Komatsu Utility F50003 Operation & Maintenance Manual Download

Page: 164 / 284

TROUBLESHOOTING

162

3.15.4.3 BRAKING SYSTEM

3.15.4.4 CONVERTER

3.15.4.5 ENGINE

TROUBLE

CAUSE

REMEDY

Braking not regular for both wheels:

• Brake discs worn.
• No oil in brake pump.
• Air in braking circuit.

(•) Change.
(•) Top up and bleed circuit.
(•) Bleed circuit.

Braking not regular on one side only:

• Air in braking circuit.
• Brake disc worn.

(•) Bleed circuit.
(•) Change.

TROUBLE

CAUSE

REMEDY

Low pressure in the clutch:

• Oil level too low.
• Clutch pressure adjusting valve

locked open.

• Faulty delivery pump.
• Clutch shaft or piston rings.
• Leakages due to clutch piston pump

locked open.

• Top up.

(•) Clean element and seat.

(•) Change.
(•) Change rings.
(•) Clean valve carefully.

Pump delivery insufficient:

• Oil level too low.
• Suction filter clogged.
• Faulty pump.

• Top up.
• Clean filter.

(•) Change.

Overheating:

• Damaged rings.

• Faulty pump.
• Oil level too low.
• Dirty heat exchanger.
• Damaged heat exchanger.

(•) Remove, disassemble and reas-

semble the unit.

(•) Change.

• Top up.
• Clean.
• Change.

Noisy converter:

• Faulty pump.
• Damaged bearings.

(•) Change.
(•) Remove and change.

Lack of power:

• Low engine rpm causes stall speed.
• Defect as if due to overheating.

(•) Check and set up engine governor.

• See remedies in case of overheat-

ing.

TROUBLE

CAUSE

REMEDY

Oil pressure warning light remains on
even with engine at high speed:

• Oil level in oil pan too lo.
• Oil filter clogged.
• Oil unsuitable for the season.

• Top up.
• Change filter.
• Change.

Summary of Contents for F50003

Page 1: ...se of this machine may cause serious injury or death Operators and maintenance personnel must read this manual before operating or maintaining this machine This manual should be kept inside the cab for reference and periodically reviewed by all personnel who will come into contact with the machine ATTENTION ...

Page 2: ......

Page 3: ...ance operations that have been carried out are important to have a clear prospect of the situation and to know exactly what has been done and what has to be done after the next maintenance interval Therefore it is advisable to consult both the hour meter and the maintenance plan frequently q Komatsu Dealers have gathered a considerable amount of experience over years of work in close contact with ...

Page 4: ...eath The use of this term must be limited to situations of extreme danger WARNING q Indicates a situation of potential danger that if not avoided may cause serious injury and even death CAUTION q Indicates a situation of potential danger that if not avoided may cause moderate injury This term can also be used as a warning in case of dangerous procedures Other terms used in the signs In addition to...

Page 5: ...perty or the machine if this has been tampered with by modifying the standard setting of the hydraulic system WARNING q Before carrying out any electric welding operation disconnect the battery and the alternator See 2 8 13 PRECAUTIONS CONCERNING THE BATTERY AND THE ALTERNATOR WARNING q Install only authorized additional equipment See 6 1 AUTHORIZED OPTIONAL EQUIPMENT WARNING q The machine can tra...

Page 6: ...if the equipment is supplied by Komatsu these publications are enclosed to this manual q The instructions regarding the assembly of the authorized equipment the controls requiring special ar rangements on the machine and the hydraulic couplings necessary for the operation of the equipment are grouped in the final section of this manual Komatsu BACKHOE LOADERS are constructed exclusively for the ha...

Page 7: ...untimely reduced Every new machine must be used carefully paying special attention to the following indications q After the start let the engine idle for 5 minutes in such a way as to warm it up gradually before actual operation q Avoid operating the machine with the limit loads allowed or at high speed q Avoid abrupt starts or accelerations useless sudden decelerations and abrupt reversals q Afte...

Page 8: ...the EU harmonised standards The Product Identification Number PIN is stamped on the lower part of the plate The customer must be able to indicate the PIN at any time that is why it must compulsorily be written in the following table The plate with the CE marking is applied inside the cab on the left vertical wall of the frame at the height of the brake pedals RKAB2670 RKAB2680 37A 98 11820 MODELLO...

Page 9: ...s RKAB2680 NUMERO DI OMOLOGAZIONE HOMOLOGATION NUMBER TIPO TYPE MODEL MASSA TOTALE AMMISSIBILE TOTAL MASS WEIGHT CARICO AMMISSIBILE ASSE ANT WEIGHT FRONT AXLE CARICO AMMISSIBILE ASSE POST WEIGHT REAR AXLE Product Identification Number PIN DA FROM DA FROM DA FROM A TO A TO A TO Massa rimorchiabile non atto POTENZA MOTORE MATRICOLA SERIAL NUMBER ANNO MANUFACTURED BY KOMATSU UTILITY EUROPE S p A 3602...

Page 10: ... of the engine block bears the Manufacturer s mark and contains the follow ing data 1 Engine type 2 Engine family 3 Serial number 4 EC Type Approval 5 EPA The serial number 3 is also stamped on the right side of the cylinder block on the upper part of the oil cooling heat ex changer 1 4 5 FRONT AXLE SERIAL NUMBER The serial number of the front axle is stamped on the plate po sitioned on the right ...

Page 11: ...oned on the right side of the axle body 1 4 7 TRANSMISSION SERIAL NUMBER The transmission serial number is stamped on the plate pos tioned on the right side of the transmission case 1 4 8 CAB SERIAL NUMBER The cab serial number is stamped on the plate postioned on the left side of the rear wall RKAB2730 RKAB2750 RKAB2740 ...

Page 12: ... IDENTIFICATION 10 1 4 9 SERIAL NUMBERS AND DEALER S ADDRESS Machine no Mod Front axle no Rear axle no Transmission no Dealer Address Tel Contact person NOTES Cab no Product identification number PIN Engine no ...

Page 13: ...AND RELEVANT MEANINGS 22 2 1 3 POSITION OF THE NOISE PLATES ON MACHINES WITH CAB 28 2 1 4 VIBRATIONS TO WHICH THE OPERATOR IS SUBJECTED 29 2 2 GENERAL PRECAUTIONS 30 2 2 1 GENERAL SAFETY RULES 30 2 2 2 SAFETY DEVICES AND GUARDS 30 2 2 3 CLOTHING AND PERSONAL PROTECTION ITEMS 30 2 2 4 UNAUTHORIZED MODIFICATIONS 30 2 2 5 LEAVING THE OPERATOR S SEAT 31 2 2 6 GETTING ON AND OFF THE MACHINE 32 2 2 7 CH...

Page 14: ...3 2 8 5 WORKING UNDER THE MACHINE 53 2 8 6 KEEPING THE MACHINE CLEAN 54 2 8 7 USE OF THE ENGINE DURING MAINTENANCE 54 2 8 8 PERIODICAL CHANGE OF THE SAFETY RELATED PARTS 54 2 8 9 STOP THE ENGINE BEFORE CARRYING OUT ANY MAINTENANCE OPERATION OR INSPECTION 55 2 8 10 RULES TO BE FOLLOWED DURING FUEL OR OIL TOPPING UP 56 2 8 11 CHECKING THE COOLANT LEVEL IN THE RADIATOR 56 2 8 12 USING LAMPS 56 2 8 13...

Page 15: ...3 4 1 CENTRAL UNIT FUSES RELAYS AND ENGINE LINE 114 3 4 1 1 FUSES 114 3 4 1 2 RELAYS 116 3 4 2 VENTILATION HEATING AND AIR CONDITIONING FUSES AND RELAYS 117 3 4 2 1 FUSES 117 3 4 2 2 RELAYS 117 3 5 GUARDS CAB AND DRIVER S SEAT 118 3 5 1 ENGINE HOOD 118 3 5 2 CAB 119 3 5 3 VENTILATION AND HEATING 122 3 5 4 AIR CONDITIONER if installed 123 3 5 5 SEAT 125 3 5 5 1 SEAT STANDARD 125 3 5 5 2 SEAT OPTION...

Page 16: ...S 148 3 12 3 CHANGING THE STANDARD FRONT BUCKET 148 3 13 USING THE MACHINE AS AN EXCAVATOR 149 3 13 1 POSITIONING THE BUCKET ACCORDING TO THE WORK THAT MUST BE CARRIED OUT 149 3 13 2 POSITIONING THE MACHINE FOR DIGGING OPERATIONS 150 3 13 3 SLIDING THE BACKHOE UNIT SIDEWARDS 151 3 13 4 DIGGING METHOD 152 3 13 4 1 CHANGING THE BACKHOE BUCKET 153 3 14 LONG PERIODS OF INACTIVITY 154 3 14 1 PREPARING ...

Page 17: ... 4 6 1 1 FUEL SYSTEM 182 4 6 1 2 DELIVERY HYDRAULIC SYSTEM 183 4 6 1 3 FRONT LOADER HYDRAULIC SYSTEM 184 4 6 1 4 BACKHOE HYDRALIC SYSTEM 185 4 6 1 5 OPERATOR S SAFETY 186 4 7 MAINTENANCE PLAN 187 4 8 MAINTENANCE PROCEDURES 189 4 8 1 WHEN REQUIRED 189 4 8 1 a CHECKING CLEANING OR CHANGING THE ENGINE AIR FILTERS 189 4 8 1 b CHECKING AND CLEANING THE CAB AIR FILTER 190 4 8 1 c CHECKING AND CLEANING T...

Page 18: ... OIL LEVEL 211 4 8 8 f CHECKING THE HYDRAULIC TRANSMISSION OIL LEVEL 212 4 8 8 g CHECKING THE WHEEL NUT DRIVING TORQUE 212 4 8 9 MAINTENANCE AFTER THE FIRST 500 HOURS OF OPERATION Only for machines in which synthetic biodegradable oil type HEES is used 213 4 8 10 MAINTENANCE EVERY 500 HOURS OF OPERATION 213 4 8 10 a CHANGING THE ENGINE OIL 213 4 8 10 b CHANGING THE ENGINE OIL FILTER 214 4 8 10 c C...

Page 19: ...AUTIONS REGARDING SAFETY 242 6 1 2 PRECAUTIONS REGARDING THE INSTALLATION OF EQUIPMENT 243 6 1 3 CHARACTERISTICS OF THE OPTIONAL EQUIPMENT 244 6 2 FRONT EQUIPMENT QUICK COUPLING DEVICES 245 6 2 1 MANUAL QUICK COUPLING 245 6 2 2 HYDRAULIC QUICK COUPLING FOR STANDARD BUCKET 246 6 2 3 HYDRAULIC QUICK COUPLING FOR 4in1 BUCKET AND OPTIONAL EQUIPMENT WITH UNIDIRECTIONAL OIL FLOW 246 6 3 4in1 BUCKET 247 ...

Page 20: ...68 6 8 1 1 CONTROL version with mechanically controlled backhoe 268 6 8 1 2 CONTROL version with servo assisted backhoe 268 6 8 2 INSTALLING AND CONNECTING THE EQUIPMENT 269 6 8 3 MAINTENANCE 269 6 9 CONFIGURATION FOR THE USE OF THE CLAMSHELL BUCKET 270 6 9 1 DESCRIPTION AND CONTROL 270 6 9 1 1 CONTROL version with mechanically controlled backhoe 270 6 9 1 2 CONTROL version with servo assisted bac...

Page 21: ...SAFETY AND ACCIDENT PREVENTION 19 ...

Page 22: ... 93 11130 DURANTE I TRASFERIMENTI SU STRADA I PEDALI FRENO DEVONO ESSERE COLLEGATI CON APPOSITO SPINOTTO 42N 93 11110 I NON INSERIRE LA DOPPIA TRAZIONE IN TRASFERIMENTO STRADALE GB D F E P DO NOT ENGAGE 4 WHEEL DRIVE DURING ROAD TRAVELLING W HREND DER STRASSENFAHRT NICHT DIE 4 RADANTRIEB EINSCHALTEN NE PAS ENGAGER LES 4x4 POUR LE DEPLACEMENT ROUTIER DESCONECTAR 4x4 ANTES DE CIRCULAR EN CARRETERA N...

Page 23: ...SAFETY NOISE AND VIBRATION PLATES 21 SW L 1000 kg RKA13490 42N 93 11320 RKAB4740 42N 93 11310 ...

Page 24: ...ined in the following list WORK AREA q Do not approach or stand in the equipment operating radius when the boom and the bucket are lifted DO NOT OPEN THE ENGINE HOOD q Do not open or remove the hood when the engine is running HYDRAULIC OIL TOPPING UP q Only for machines in which synthetic biodegradable oil type HEES is used OVERTURNING THE FORKS q When overturning the forks for use or storage be v...

Page 25: ...k absorber q Do not bring the shock absorber near sparks or naked flames q Do not make holes in the shock absorber do not weld or use oxyhydrogen flames q Do not hit the shock absorber DO NOT START THE ENGINE WITH INCORRECT PROCEDURES q Start the engine and operate the machine only while seated with fastened safety belt q Do not attempt to start the engine by causing a short circuit with the termi...

Page 26: ...ed with the apposite pin DO NOT ENGAGE THE 4WD q When the machine travels on roads do not engage the 4WD HYDRAULIC OIL TOPPING UP HYDRAULIC OIL LEVEL PRIMA DI PARTIRE PER IL TRASFERIMENTO SU STRADA BLOCCARE LA LEVA COMANDO PALA 42N 93 12460 RKA14770 DURANTE I TRASFERIMENTI SU STRADA I PEDALI FRENO DEVONO ESSERE COLLEGATI CON APPOSITO SPINOTTO 42N 93 11110 RKA14780 I GB D F E P 42N 93 11120 RKA1479...

Page 27: ...LIC OIL FILTER REFUELLING FUEL FILTER ENGINE LUBRICATING OIL FILTER ENGINE AIR SUCTION FILTER ENGINE COOLANT 37A 98 12310 RKA14820 37A 98 12240 RKA14830 D 37A 98 12250 RKA14840 D 37A 98 12230 RKA14850 37A 98 12260 RKA14860 37A 98 12340 RKA14870 ...

Page 28: ...6 COOLANT PRESSURE TRANSMISSION OIL LEVEL TRANSMISSION OIL FILTER POWER OUTLET BOOM LOCK SWING LOCK 37A 98 12270 RKA14880 395 93 11440 RKA14590 395 93 11420 RKA14580 42N 93 11270 RKA14890 12 V 42N 93 11320 RKA14900 42N 93 11310 RKA14910 ...

Page 29: ...TY NOISE AND VIBRATION PLATES 27 ANCHORAGE POINT EMERGENCY EXIT BRAKE OIL DO NOT LIFT MORE THAN 1000 kg 42N 93 11360 RKA14920 42N 93 11260 RKA14930 B RAKE OI L B R A K E O I L RKA14940 RKA14950 SWL 1000 Kg ...

Page 30: ... ask for new ones to Komatsu or to your Komatsu Dealer q In case of replacement of a component provided with a noise plate make sure that this plate is applied also on the new piece NOISE OUTSIDE THE CAB q This value indicates the noise level outside the machine and refers to the noise perceived by persons in the vicinity of the work area NOISE INSIDE THE CAB q This value indicates the maximum noi...

Page 31: ...JECTED q According to the results of the tests carried out to determine the vibrations transmitted to the operator by the ma chine the upper limbs are subjected to vibrations lower than 2 5 m sq sec while the seated part of the body is subjected to vibrations lower than 0 5 m sq sec ...

Page 32: ...th 2 2 3 CLOTHING AND PERSONAL PRO TECTION ITEMS q Do not wear large or loose clothes rings and watches and do not approach the machine with loose long hair since they can get entagled in the moving parts of the machine and cause serious personal injury or damage Also avoid wear ing clothes that are dirty with oil or fuel since they catch fire very easily q Wear a hard hat goggles safety shoes mas...

Page 33: ...r the equipment to the ground 2 Press the servo control locking button LED on NOTE q On machines equipped with backhoe servo controls all movements are inhibited when the button is in locking posi tion LED on 3 Engage the safety lock of the mechanical controls 4 Apply the parking brake 5 Shift the reversing gear lever to the neutral position 6 Stop the engine If you have to go so far away that you...

Page 34: ...f they are loose and clean the handles and steps if they are dirty with oil or grease Carefully clean the cab floor if it is dirty with oil grease mud or rubble 2 2 7 CHECKING THE REAR VIEW MIR RORS q Make sure that the rear view mirrors are clean and correctly positioned they must allow the operator to see the rear of the machine with no need to move the chest with respect to the normal work posi...

Page 35: ...p tighten the fuel and oil safety caps securely q Do not fill the tank completely in order to leave room for the fuel to expand q If some fuel is inadvertently spilled wipe it up immediately 2 2 9 PREVENTING BURNS q If the engine coolant the engine oil and the hydraulic oil are hot use heavy cloths and wear gloves heavy clothing and safety goggles before carrying out any check or touching the hot ...

Page 36: ...ab provides suitable protection use an ap proved and homologated respirator 5 The powder gathered during the cleaning operations must be wet and put in a sealed and marked container so that it can be safely disposed of according to the regulations in force 2 2 11 PREVENTING DAMAGE CAUSED BY THE WORK EQUIPMENT q Do not stand within the operating radius of the work equip ment even when the operator ...

Page 37: ...he cab is inadvertently hit or the machine overturns during work the cab may be damaged with consequent reduction of its stiffness and of the safety that must be guaranteed to the operator ROPS FOPS Contact Komatsu or your Komatsu Dealer to have the cab structure and resistance checked in case of impact or damage 2 2 14 PRECAUTIONS CONCERNING THE EQUIPMENT q When installing and using optional equi...

Page 38: ...s q Check the water depth and the force and flow direction of the current before operating in water or on river banks 2 3 2 FIRE PREVENTION q Completely remove all wood chips rubbish paper and other flammable materials that may have accumulated inside the engine compartment since they can cause fires q Check the fuel and hydraulic system pipes for leaks and if necessary repair them Wipe up any exc...

Page 39: ...l ensure good visibility on the work area q Adjust the rear view mirrors if they have moved so that the operator seated in the driving position can clearly see the area behind the machine If any window light or mirror is damaged change it q Make sure that the road lights stop lights direction indicators and work lights are properly working If necessary change the faulty bulbs with new ones making ...

Page 40: ...ure it with the safety pins 3 Install the teeth protection casing on the front bucket 4 Lift the backhoe boom until engaging the safety coupling The arm and bucket must in any case be completely folded 5 The backhoe must be rotated and resting against the machine structure This is the only position homologated for road travel in Italy 6 For travelling with folded backhoe the unit must be moved on ...

Page 41: ...ting the job q Only one person must be entrusted with giving signals q The operator must make sure that the signalman is always within his field of vision and follow all his sig nals The use of hand signals serves to direct the lifting handling and positioning of the loads lifted by the work equip ment Hand signals can also be used during digging operations or when the machine travels if the field...

Page 42: ...e hand in the di rection of the movement to be carried out 5 LIFT THE BOOM One arm laterally outstretched in horizontal position and clenched fingers point the thumb upwards 6 LOWER THE BOOM One arm laterally outstretched in horizontal position and clenched fingers point the thumb downwards 7 SWING THE BOOM One arm laterally outstretched in horizontal position point the forefinger towards the desi...

Page 43: ...CKET Keep one hand still and open Rotate the other hand verti cally with the forefinger pointing towards the open hand 13 TRAVEL WHILE STEERING Lift the forearm corresponding to the inner steering side with clenched fist Rotate the other fist vertically indicating the wheel s turning direction 14 TRAVEL WHILE STEERING Lift the forearm corresponding to the inner steering side with clenched fist Rot...

Page 44: ...erally indicating the distance to be covered 18 CARRY OUT THE MOVEMENTS SLOWLY One hand still in front of the hand that indicates the move ment to be carried out The figure represents the lift slowly signal 19 STOP One arm outstretched laterally hand open and palm fac ing downwards move the arm forwards and backwards 20 EMERGENCY STOP Both arms outstretched laterally in horizontal position hands o...

Page 45: ...ACT THE TELESCOPIC ARM One forearm lifted forwards and clenched fingers point the thumb in the direction of the movement to be carried out 23 EXTEND THE TELESCOPIC ARM One forearm lifted forwards and clenched fingers point the thumb in the direction of the movement to be carried out RKA15340 RKA15350 RKA15360 ...

Page 46: ...starting to travel in reverse make sure that the acoustic alarm is functioning perfectly See 3 3 6 pos 1 REVERSING GEAR LEVER 2 4 5 MOVING THE MACHINE q When moving the machine position the front bucket at about 30 40 cm from the ground this position makes it possible to evaluate the space required for the movements more pre cisely and at the same time ensures the stability of the ma chine q If th...

Page 47: ...ge a low gear and the four wheel drive q Do not travel down slopes in neutral you may lose control of the machine and cause serious injuries and even death q Avoid disengaging the gearshift with the push button posi tioned on the loader control lever q When travelling down a slope engage a low gear so that the braking action of the engine is used to hold the machine with no need to overload the br...

Page 48: ...ith the behaviour rules to be followed in case of electrocution 5 Keep the phone number of the electric energy company and of the nearest hospital at hand q If the work equipment gets accidentally entangled in the ca bles the operator must not leave the cab until the electricity company has insulated the line q When carrying out this kind of operations warn everyone standing in the work area to ma...

Page 49: ...is used to clear snow or as snowplough on roads installing the specific optional equipment and even chains if necessary be careful to the road shoulders and to any object obstacle buried in the snow way side posts milestones signs just above the asphalt etc 2 4 10 PREVENTING DAMAGE CAUSED BY THE WORK EQUIPMENT q When working in tunnels galleries under electric cables or other ducts air telephone l...

Page 50: ...ty blocks under the front and rear wheels q Always rest the work equipment on the ground if it is neces sary to park with lifted arms make sure that the safety locks are engaged q Always engage the control lever safety locks NOTE q The servo control locking button inhibits also the movements of the backhoe when this is equipped with servo controls q When leaving the machine apply the parking brake...

Page 51: ...th q Position the ramps with a maximum inclination of 15 q Make sure that the ramp surface is clean and there is no trace of grease oil soil and ice remove dirt from the wheels before starting to load the machine on the vehicle q The machine must be loaded on the vehicle with the bucket directed forwards that is in the direction of advancement of the vehicle q Do not correct the trajectory of the ...

Page 52: ... and remove the ignition key q Avoid short circuiting the battery terminals through acciden tal contact with metal objects or tools or through the inver sion of the terminals q Tighten the battery terminals securely Loose terminals may generate sparks and even cause the explosion of the bat tery 2 6 2 STARTING WITH BOOSTER CABLES q When starting the machine with booster cables always wear safety g...

Page 53: ...deformed cables C q During the removal no one should be allowed to get near the machines or the cable q Do not get astride the cable q Move the machine only as far as necessary to allow the re quired repairs to be carried out q Do not remove the machine in any way other than that indi cated in paragraph 3 15 1 HOW TO REMOVE THE MA CHINE CAUTION q The maximum applicable force for each draw hook is ...

Page 54: ...lways attach warning plates to the steering wheel to the control levers and to the ignition key before performing any maintenance operation if necessary attach additional warning tags also around the machine and in particular on the cab door handles 2 8 2 TOOLS q Use only the tools supplied together with the machine and high quality tools suitable for the tasks to be performed q Do not use worn da...

Page 55: ...The normal or special equipment that must be installed on the machine or that have been removed must be stored in a safe place and positioned in such a way as to prevent them from falling down If they fall on someone they may cause serious bodily harm q When assembling or removing any equipment make sure that the ropes and the lifting hook are in good conditions and properly dimensioned for the lo...

Page 56: ...G MAINTENANCE q During maintenance operations run the engine only when indispensable If the engine must be running for ex ample when checking the functionality of the alternator it is advisable that someone remains seated in the driv ing position so that the engine can be stopped whenever necessary q During maintenance operations with running engine neither move the control locking devices from th...

Page 57: ...ainte nance engage the safety LOCKS of the equipment control levers apply the parking brake and carry out any mainte nance operation with the help of another person an operator must remain on board and the words to be used during the operation must be agreed upon NOTE q The servo control locking button inhibits also the movements of the backhoe when this is equipped with servo controls q The maint...

Page 58: ...d keep it con stantly in contact with the filler until you have finished in or der to avoid sparks due to static electricity q Do not fill the tank completely in order to leave room for the fuel to expand 2 8 11 CHECKING THE COOLANT LEVEL IN THE RADIATOR q Let the engine and the radiator cool down before checking the coolant level in the radiator q If it is necessary to remove the cap with hot eng...

Page 59: ... cable and then the negative cable q If electrical welding operations are to be carried out on the machine it is necessary to disconnect the battery and also the alternator 2 8 14 PRECAUTIONS CONCERNING THE STARTER q Start the engine only when correctly seated in the driving po sition q Do not attempt to start the engine by causing a short circuit with the terminals of the starter This may cause f...

Page 60: ... gloves dur ing the inspections and use a piece of cardboard or a sheet of plywood to check for oil leakages Small leakages from pipes under pressure and the resulting jets are extremely dangerous since they can perforate the skin and get in the blood circulation or injure the eyes q If you are struck by a jet of high pressure oil or are injured even if slightly consult a doctor without delay 2 8 ...

Page 61: ...omponents since clothes or parts of the body may get caught into them q If hands clothes or tools become entangled in the fan blades or the fan belt they may be cut off torn or seriously injured damaged for this reason avoid touching any revolv ing part 2 8 20 WASTE MATERIALS q Do not dispose of used oil in the sewer system rivers etc q Always put used oil in containers Do not drain used oil di re...

Page 62: ...ric and polymeric waste according to the regulations in force q Do not touch any burnt elastomeric or polymeric waste and in case of accidental burning avoid inhaling the toxic gases produced q In case of contact with the skin immediately rinse with a so lution made of water and an alkaline detergent for about 30 minutes and then contact a poisoning treatment center with out delay 2 8 22 PRECAUTIO...

Page 63: ... TO BE TAKEN WHEN USING SYNTHETIC BIODE GRADABLE OIL TYPE HEES q It is not possible to mix the synthetic biodegradable oil type HEES with ordinary hydraulic oils since when the temperature increases insoluble compounds are generated which are deposited on the filters and clog them the maximum concentration of ordinary oil must not exceed 1 of the total quantity of oil q Biodegradable oil can be us...

Page 64: ...62 THIS PAGE WAS INTENTIONALLY LEFT EMPTY ...

Page 65: ...THE MACHINE AND ITS OPERATIONS 63 ...

Page 66: ...inct essential functions a SAFETY LOCK 1 for the position of the arm when the machine is subjected to maintenance on the propeller unit and inspection of the hydraulic system equipment and of the auxiliary equipment housed in the engine compart ment and in any case to the inspections and maintenance operations that must be carried out with lifted arm A b SAFETY LOCK 2 for the position of the arm w...

Page 67: ...ications of the safety locks concern a Installation of the front bucket swing lock 1 b Locking position of the button inhibiting the front loader control 2 LED on c Installation of the teeth guard 3 RKAB2880 2 1 RWAA0770 RKA13810 3 ...

Page 68: ...vented both in the central and in the folded position by means of a pin To lock the boom proceed as follows 1 Fold the bucket and arm completely 2 Press the button 1 LED on to raise the safety lock 3 3 Lift the boom completely and release the button 1 LED off to engage the safety lock to the boom 4 Rotate the boom and insert the swing lock pin 4 RKAB2900 RKAB2890 2 1 RKAB2910 3 RKAB2920 4 3 ...

Page 69: ...LED on 6 Stop the engine and shift the levers 6 to settle the safety locks 7 Inhibit the movements of the backhoe control levers by shifting the lever 7 to the locking position NOTE q On machines equipped with backhoe servo controls the movements are inhibited by the servo control locking button see 3 3 2 pos 12 SERVO CONTROL LOCKING BUT TON RKA13820 5 RKAB2930 7 6 ...

Page 70: ... FRONT GENERAL VIEW 1 Front bucket 2 Bucket dumping cylinder 3 Bucket lifting arm 4 Cab 5 Hydraulic oil tank 6 Rear axle 7 Fuel tank 8 Lifting cylinder 9 Front axle 10 Backhoe bucket cylinder RKAB5630 3 9 8 7 6 10 1 2 2 4 5 RIGHT FORWARD LEFT ...

Page 71: ... 3 Boom 4 Arm cylinder 5 Boom cylinder 6 Revolving support 7 Right access platform and tool box 8 Backhoe sliding guides 9 Stabilizers 10 Backhoe locking cylinders 11 Boom swing cylinders 12 Sliding plate RIGHT FORWARD LEFT RKAB5730 2 7 1 3 4 5 9 8 10 11 6 12 ...

Page 72: ...nt loader control lever 11 Parking brake 12 Hand accelerator 13 Arm and swing control lever Standard version ISO pattern controls Boom and swing control lever On request Komatsu pattern and X pattern controls 14 Boom and bucket control lever Standard version ISO pattern controls Arm and bucket control lever On request Komatsu pattern and X pattern controls 15 Right stabilizer control lever 16 Left...

Page 73: ...king brake 12 Hand accelerator 13 Arm and swing control lever Standard version ISO pattern controls Boom and swing control lever On request only with Pattern Change Komatsu pattern con trols 14 Boom and bucket control lever Standard version ISO pattern controls Arm and bucket control lever On request only with Pattern Change Komatsu pattern con trols 15 Left stabilizer control lever 16 Right stabi...

Page 74: ...rning light 2 Four wheel drive warning light 9 General alarm warning light 3 Differential locking warning light 10 High beam warning light 4 Parking brake warning light 11 Low beam warning light 5 Transmission oil temperature warning light 12 Parking lights and instrument lights warning light 6 Left direction indicator warning light 13 Direction selector dimmer switch horn blinking front windshiel...

Page 75: ...RNING LIGHT It comes on when the parking brake is applied 5 TRANSMISSION OIL TEMPERATURE WARNING LIGHT It comes on and activates the acoustic alarm when the trans mission oil exceeds the maximum temperature allowed when it comes on immediately stop the machine put it in neutral and let it cool down with the engine idling at approximately 1200 rpm until the warning light goes out If this occurs rep...

Page 76: ... on at the same time as the warning light 6 when the hazard flashers are activated see 3 3 2 pos 16 HAZARD FLASHERS 8 LOW OIL PRESSURE OR BRAKING SYSTEM FAIL URE WARNING LIGHT It comes on to indicate that the brake oil pressure is low or that there is no oil in the reservoir due to leakages 9 GENERAL ALARM WARNING LIGHT This warning light comes on a for about 3 seconds during the general warning l...

Page 77: ...GHT It comes on when the parking lights are operated with one click of the switch 17 positioned on the side dashboard see 3 3 2 pos 17 PARKING LIGHTS AND LOW BEAM SWITCH 13 DIRECTION SELECTOR DIMMER SWITCH HORN BLINKING FRONT WINDSHIELD WIPER WASHER This is a combined switch positioned under the steering wheel on the right side and controls the following functions A Left direction indicator B Righ...

Page 78: ...warning light 10 Revolving light warning light 11 Acoustic alarm 12 Servo control locking button 13 Backhoe speed control button 14 Backhoe sliding lock switch 15 Backhoe boom lock switch 16 Hazard flashers 17 Low beam and parking lights switch 18 Four wheel drive switch 19 Rear horn 20 Safety valve switch if installed 21 Load stabilizer system switch if provided 22 Optional equipment switch if pr...

Page 79: ...tor reaches the red area indicating that the tem perature is too high the acoustic alarm sends out a continu ous signal the warning light 7 comes on and the general alarm warning light flashes on and off see 3 3 1 pos 9 GENERAL ALARM WARNING LIGHT 3 REVOLUTION COUNTER HOUR METER This is a combined instrument that indicates the engine speed with a pointer while the number of operating hours appears...

Page 80: ... working and the battery is not charged correctly IMPORTANT q If the warning light remains off when the ignition key is turned to position I this means that the alternator is faulty or broken 6 GLOW PLUG PREHEATING WARNING LIGHT It comes on when the ignition key is turned to position for the cold start of the engine see 3 6 2 2 STARTING WITH COLD ENGINE OR IN COLD CLIMATES 7 ENGINE COOLANT TEMPERA...

Page 81: ...G THE EN GINE AIR FILTERS 10 REVOLVING LIGHT WARNING LIGHT It comes on when the revolving light is operated by means of the switch positioned on the upper right side of the cab see 3 3 5 pos 2 REVOLVING LIGHT SWITH 11 ACOUSTIC ALARM The acoustic alarm starts when the circuits are energized with the ignition key turned to position and stops automatical ly after the automatic check on the warning li...

Page 82: ...e quantity of oil delivered by the hydraulic pump to be selected Whenever restarted the machine auto matically selects the POWER mode LED on even if when it stopped the selected mode was ECONOMY This position makes it possible to use the maximum oil delivery and is indis pensable for a correct use of the backhoe When the button is pressed LED off the ECONOMY operating mode is selected To return to...

Page 83: ...a chine is temporarily parked stopped on the roadway or in any case in anomalous position 17 PARKING LIGHTS AND LOW BEAM SWITCH This is a two position switch with one click it switches on the parking lights and instruments with two clicks it switches on the low beam The parking lights can be switched on even with the machine at rest 18 FOUR WHEEL DRIVE SWITCH When pressed LED on this switch engage...

Page 84: ...te the electric safety valves when the load stabilizer system LSS is operated For further information regarding the LSS see 6 11 LOAD STABILIZER SYSTEM LSS Optional 21 LOAD STABILIZER SYSTEM SWITCH LSS if provided Pressing the switch LED on enables the load stabilizer sys tem LSS When the switch is in this position the battery can be re charged and the pressure is kept constant For further informa...

Page 85: ...mperature of the air delivered by the heater can be ad justed through the knob positioned under the switch Turn the knob clockwise to increase the temperature and counterclock wise to reduce it If the machine is provided with air conditioning system the same knob can be used to adjust the air flow and therefore the temperature inside the cab For further information see 3 5 4 AIR CONDITIONER if ins...

Page 86: ...TTON 2 DIFFERENTIAL LOCKING PUSH BUTTON This push button must be used with low gears and reduced speed only when it is necessary to make the rear driving wheels integral with each other in case of slipping see 3 3 6 pos 11 DIFFERENTIAL LOCKING PUSH BUTTON The warning light 3 on the front instrument panel see 3 3 1 pos 3 DIFFERENTIAL LOCKING WARNING LIGHT indi cates that the push button is in use 3...

Page 87: ...3 3 6 pos 13 4 IN1 BUCKET FOLDING PUSH BUTTON 5 FRONT LOADER SPEED CONTROL PUSH BUTTON This button is used to increase the speed of the front loader movements 3 3 4 PUSH BUTTON ON THE GEARSHIFT LEVER 1 DECLUTCH PUSH BUTTON This push button is used to shift gears when the machine is travelling See 3 3 6 pos 15 DECLUTCH PUSH BUTTON RKA14060 RKA14070 RKAB3120 ...

Page 88: ...OLVING LIGHT SWITH This switch must be operated when it is necessary to travel on roads and after connecting the light to the outlet installed on the cab roof 3 REAR WORK LIGHT SWITCH This switch enables the rear work lights installed on the cab IMPORTANT q When travelling on roads switch off the work lights 4 REAR WINDSHIELD WIPER SWITCH This switch operates the rear windshield wiper RKAB4620 1 R...

Page 89: ...ight of the in spection lamp when maintenance operations are to be carried out and visibility is scarce and of the emergency light The outlet is powered with the revolving light switch See 3 3 2 pos 13 BACKHOE SPEED CONTROL BUTTON 8 CIGARETTE LIGHTER SOCKET The socket 8 is positioned on the lower part of the side dash board and is powered by a 12V supply It is used for the ciga rette lighter and i...

Page 90: ...rclockwise and releasing it Always interrupt the pas sage of current before carrying out any operation on the bat tery or the electric system and before carrying out any welding operation on the machine To restore the electric contact put back the switch and turn it clockwise 10 APERTURE FOR THE INSTALLATION OF A CAR RA DIO if provided If the machine is provided with an aperture for the installati...

Page 91: ...lever 5 Gearshift lever 6 Parking brake 7 Hand accelerator 8 Backhoe boom locking button 9 Backhoe sliding lock switch 10 Declutch push button 11 Differential locking push button 12 4in1 bucket opening push button 13 4in1 bucket folding push button 14 Front loader speed control push button 15 Declutch push button RKAB3090 5 4 9 6 8 RKAB3100 7 RKAB3080 1 5 3 2 RKAB3110 14 11 13 12 10 RKAB3120 15 ...

Page 92: ...INSTRUMENTS AND CONTROLS 90 16 Left stabilizer control lever 17 Right stabilizer control lever 18 Left backhoe control lever 19 Right backhoe control lever RKAB3130 19 18 RKAB3140 16 17 ...

Page 93: ...t lever 6 Parking brake 7 Hand accelerator 8 Backhoe boom locking button 9 Backhoe sliding lock switch 10 Declutch push button 11 Differential locking push button 12 4in1 bucket opening push button 13 4in1 bucket folding push button 14 Front loader speed control push button 15 Declutch push button RKAB3090 5 4 9 6 8 RKAB3100 7 RKAB3080 1 5 3 2 RKAB3110 14 11 13 12 10 RKAB3120 15 ...

Page 94: ...zer control switch 17 Right stabilizer control switch 18 Left backhoe control lever 19 Right backhoe control lever 20 Pattern change control lever if provided and only for the version with servo assisted backhoe RKAB3140 16 17 RKA15080 18 19 20 ...

Page 95: ...elt q Non compliance with these rules may cause serious accidents IMPORTANT q Operate the lever only when the engine is running at low speed q The engine can be started only with the lever in neutral position N q If the operator deems it necessary the machine may also be equipped with an acoustic alarm for move ments in reverse This device can be installed on a special area in the rear part of the...

Page 96: ...en the pedals 2 are used individually reduce the speed and keep the bucket as low as possible The pedals must al ways be connected with each other by means of the connec tion pin A when the high gears are engaged and when the machine travels on roads IMPORTANT q When the machine is running at high speed and only with the 4th gear engaged the braking power is in creased with the automatic engagemen...

Page 97: ...on the opera tor s right and controls the lifting and lowering of the arm and the folding and dumping of the bucket according to the orthog onal movements listed below If the machine is properly equipped the shifting of the lever to position E one click sets the loader to a free or floating posi tion that is to a position in which it can automatically follow the undulation of the ground Shifting t...

Page 98: ... single functions are operated at the same time N Neutral A Arm lowering Bucket folding B Arm lowering Bucket dumping C Arm lifting Bucket dumping D Arm lifting Bucket folding IMPORTANT q All movements are inhibited when the safety button A is in locking position LED on see 3 3 2 pos 12 SERVO CONTROL LOCKING BUTTON CAUTION q When the machine travels on roads the servo control locking device must a...

Page 99: ...he machine unattended even if tem porarily By means of the lever 5 it is possible to engage one of the four available gears which are arranged according to the dia gram The choice of the gear to be engaged is up to the operator it is advisable to use the low gears for heavy duty applications and to use the high gears for movements on flat surfaces or to trav el at high speed This precaution serves...

Page 100: ...ven death q The parking brake must be released if the machine breaks down and it is necessary to remove it Braking is obtained by pulling the lever completely upwards until the safety device is coupled release is obtained by press ing the lower safety device while releasing the lever which au tomatically returns downward CAUTION q The warning light 4 on the front instrument panel see 3 3 1 pos 4 P...

Page 101: ... indications given on the plate C applied inside the right dashboard If possible avoid using the machine with the lever completely pushed for ward since in this way consumption will be considerably in creased and the life of both the engine and the machine shortened The plate C is characterized by two coloured areas the green area A and the red area B referring to different en gine speeds q Green ...

Page 102: ... in this position even when the boom is connect ed to the safety lock To engage the safety lock proceed as follows Fold the arm and the bucket Press the button 8 LED on to raise the safety lock and keep it pressed Lift the boom com pletely and release the button LED off to engage the safety lock to the boom Before moving the machine make sure that the lock is proper ly positioned in its seat IMPOR...

Page 103: ...in locking position For further details see 3 3 2 pos 12 SERVO CON TROL LOCKING BUTTON CAUTION q Before starting any operation make sure that the back hoe is fixed on its guides 10 DECLUTCH PUSH BUTTON WARNING q Do not use this button for more than 15 20 seconds q Do not use this button during travel on roads and espe cially when travelling downhill since this function re leases the clutch and set...

Page 104: ...nt panel see 3 3 1 pos 3 DIFFERENTIAL LOCKING WARNING LIGHT sig nals that the differential is locked 12 4 IN1 BUCKET OPENING PUSH BUTTON On machines equipped with 4in1 bucket the distributor for the opening of the bucket is controlled via the push button 12 po sitioned on the loader control lever Press the button to open the bucket when the button is re leased the bucket stops NOTE q This control ...

Page 105: ...pe cially when travelling downhill since this function re leases the clutch and sets the machine in neutral The push button 15 is used to shift gears when the machine is moving See 3 3 6 pos 5 GEARSHIFT LEVER 16 17 STABILIZER CONTROL LEVERS WARNING q Before moving the machine make sure that the stabiliz ers are completely raised q When travelling on roads raise the stabilizers and en gage the safe...

Page 106: ...the backhoe equipment or in any case with the seat rotated by 180 with respect to the regular driving position Remember that the operator is allowed to move the machine only while seated in the correct driving position with locked seat and fastened safety belt q Before leaving the work position lower the equipment to the ground and do not stop the engine if the safety lock is not engaged q When tr...

Page 107: ... driving position Remember that the operator is allowed to move the machine only while seated in the correct driving position with locked seat and fastened safety belt q Before leaving the driver s seat lower the equipment to the ground engage the safety device to lock the con trols and raise both joysticks towards the rear of the machine q Before starting work check the control pattern by carry i...

Page 108: ... trols and start work 5 At the end of work lower the equipment to the ground and lock the controls again with button A LED on 6 Before rotating the seat to the driving position shift the joysticks in vertical position paying attention to the safety distance from the rear window If the end of stroke of the joysticks needs adjusting use the screws positioned on the front part of the same see 3 3 6 3...

Page 109: ...roportional to the angle of inclination are obtained since the two hydraulic distributors responsible for each single function are operated at the same time LEVER 18 COMBINED MANOEUVRES N Neutral A Arm opening Boom swing to the left B Arm opening Boom swing to the right C Arm folding Boom swing to the right D Arm folding Boom swing to the left LEVER 19 COMBINED MANOEUVRES N Neutral A Boom lowering...

Page 110: ...ts proportional to the angle of inclination are obtained since the two hydraulic distributors responsible for each single function are operated at the same time LEVER 18 COMBINED MANOEUVRES N Neutral A Boom lowering and swing to the left B Boom lowering and swing to the right C Boom lifting and swing to the right D Boom lifting and swing to the left LEVER 19 COMBINED MANOEUVRES N Neutral A Arm ope...

Page 111: ... axis simultaneous movements proportional to the angle of inclination are obtained since the two hydraulic distributors responsible for each single function are operated at the same time LEVER 18 COMBINED MANOEUVRES N Neutral A Boom lifting and swing to the left B Boom lowering and swing to the left C Boom lowering and swing to the right D Boom lifting and swing to the right LEVER 19 COMBINED MANO...

Page 112: ... con trol pattern he prefers The pattern change control lever 20 has two positions q Pos 1 ISO PATTERN control system Lever in position B q Pos 2 OPTION PATTERN control system Lever in position C The control lever 20 is held in its position by means of a safe ty screw D When it is necessary to change the control pat tern raise the mat and loosen the safety screw D until releasing the lever 20 comp...

Page 113: ...e adjusted only with engine off and the operator seated in the driving position q Before using the machine make sure that both the steering wheel and the adjusting lever are locked Non compliance with these instructions may lead to se rious accidents The lever 1 is positioned under the steering wheel and allows the latter to be adjusted according to the physical structure of the operator Different...

Page 114: ...derately trying to accompany them until they reach the desired posi tions q At the end of digging operations with the backhoe al ways shift both joysticks back to the vertical position 3 ARM SUPPORT ADJUSTING KNOB only for the version with servo assisted backhoe WARNING q The operator must adjust the arm supports while seated in the driving position before starting work and with the machine comple...

Page 115: ...icated by the arrow B 2 After adjusting both joysticks make sure that their posi tion is within the desired values If an adjustment should be necessary proceed as follows It is also possible to adjust the stroke of the joysticks when they are not used and are in vertical position Once they have been lifted make sure that the safety distance between the joystick C and the rear window D is sufficien...

Page 116: ...4 1 1 FUSES RKAB3240 1 RKAB3250 POSITION COLOUR CAPACITY A CIRCUIT INVOLVED F1 Light blue 15 Central front work lights F2 Light blue 15 Central rear work lights F3 Violet 3 Front left and rear right parking light parking light warning light instru ment backlighting F4 Violet 3 Front right and rear left parking light cigarette lighter light F5 Red 10 Front horn F6 Light blue 15 Lateral rear work li...

Page 117: ...enoid valve loader arm floating device solenoid valve return to dig solenoid valve direction indicator F22 Brown 7 5 Servo control locking solenoid valve EC power solenoid valve PPC power supply F23 Red 10 Steering unit F24 Brown 7 5 Direction indicator power supply F25 Red 10 Declutch relay forward gear solenoid valve reverse gear solenoid valve reverse alarm F27 175 General system fuse ignition ...

Page 118: ...K11 10 RKA14610 RKAB3270 K14 K15 RKAB3280 K12 K13 POSITION DESCRIPTION K1 Safety unit against repeated start K2 Blinking K3 Low beam relay K4 High beam relay K5 Front horn relay K6 Return to dig relay K7 Stop light relay K8 Start enabling relay K9 Forward gear relay K10 Reverse relay K11 Direction indicator power supply relay declutch K12 Machine functions relay K13 Start relay K14 Glow plug prehe...

Page 119: ...e following tables indicate the characteristics and the func tions of the single fuses and relays 3 4 2 1 FUSES 3 4 2 2 RELAYS 1 RKAB4830 1 RKAB4840 2 POSITION COLOUR CAPACITY A CIRCUIT INVOLVED 1 Yellow 20 1st and 2nd fan speed power supply 2 Orange 40 3rd fan speed power supply 3 Brown 7 5 Air conditioning compressor POSITION DESCRIPTION 4 3rd fan speed relay 5 General heating relay 6 Air condit...

Page 120: ...Before opening the hood lower the equipment to the ground and apply the parking brake q Before carrying out any maintenance operation inside the engine compartment park the machine on firm and flat ground lift the loader arm and engage the safety lock q Non compliance with these rules may lead to serious accidents After releasing the lock press the push button 1 raise the hood 2 and open it comple...

Page 121: ...t door emergency door is not locked The cab s rear window can be opened completely once opened this window must be secured to the upper part of the cab parallel to the roof The side windows can be opened partially or completely even if the doors are completely closed These solutions are particularly useful during the summer since they ensure constant air circulation and therefore reduced stress fo...

Page 122: ...sh the lever toward the outside of the cab After lifting the lever 3 push its end downwards in order to engage it in the upper coupling pin 5 as shown in Fig ure B If it is necessary to open the rear side windows completely proceed as follows 1 Release the lever 3 from the upper coupling pin 5 fol lowing the direction indicated by the arrow shown in Fig ure C 2 With the window open lower the lever...

Page 123: ...be locked by engaging the lever 3 with the lower 4 or upper 5 coupling pin q When the rear side windows are rotated towards the front of the machine in order to open them completely make sure that they are perfectly fixed in the relevant rubber elements 7 q Periodically lubricate the rubber elements 7 with spe cific greases in order to facilitate the coupling opera tion On request the cab access d...

Page 124: ...e vents 2 for the flows that serve to defrost and defog the front window A radiator having the function to heat the air conveyed into the cab is installed beside the fan this is used in the cold season and receives the hot water necessary for the heat exchange directly from the engine cooling circuit The water supply flow is partialized or excluded by means of a cock operated by the knob 4 The int...

Page 125: ...side tem perature is particularly high Ventilation and air change are achieved by means of a 3 speed fan which is built in the air conditioning system and as sembled on the outside of the machine under the cab The ventilation can be adjusted via the selector 2 The ventilation and cooling system ensures air suction both from the outside and the inside of the cab Air suction from the outside is prot...

Page 126: ...hine operates min every 5 days max every 15 days q Before operating the air conditioner interrupt the circu lation of hot water in the engine by rotating the valve 9 positioned in the engine compartment clockwise The air conditioner can be started by means of the switch 1 positioned on the side dashboard After starting the air conditioner LED on turn the knob 3 completely counterclockwise and adju...

Page 127: ... physical structure of the operator The adjustment of the suspension is carried out with the snap lever 3 and can be controlled by observing the position of the indicator 4 The operator must carry out this adjustment while seated the right suspension degree is reached when the indicator is posi tioned in correspondence with the seat frame If the indicator protrudes from the frame it is necessary t...

Page 128: ... will automatically adapt to the physical structure of the operator The degree of suspension can be adjusted by rotating the knob 3 and checking the graduated scale on the knob itself The ideal position is reached when the weight indicated on the scale corresponds to the operator s weight In any case the operator can choose the degree of suspension at his sole dis cretion Turn the knob 3 clockwise...

Page 129: ...achine he must position it on the appropriate hole pro vided on the left console 3 5 8 FIRST AID KIT CAUTION q Periodically make sure that the first aid kit contains the necessary disinfectants bandages medicins etc and check their condition and expiry date The first aid kit case 1 must be positioned inside the cab and precisely in the compartment provided on the left body side by the owner of the...

Page 130: ...S SEAT 128 3 5 10 STORAGE COMPARTMENT A storage compartment 1 has been obtained on the inner side of the right mudguard and can be reached after opening the door 2 The door is equipped with a lock 3 2 3 RKAB4700 2 RKAB4710 1 ...

Page 131: ... instruments and of the dashboard 11 the condition of the cab windows and the efficiency of lights work lights and direction indicators 10 the effi ciency of the instruments and of the dashboard 3 6 1 2 DAILY CHECKS WARNING q Do not smoke while refuelling and adding oil and avoid using naked flames or non homologated lighting means to check the fuel or oil level in order not to cause fires q If so...

Page 132: ...cks are intended to verify 1 if the safety locks of the front bucket and the backhoe control levers are engaged 2 the hand accelerator idling position 3 the reversing gear neutral position 4 if the gearshift lever is in neutral 5 if the parking brake is applied The following check is carried out by turning the ignition key to position to apply voltage to the control panel and check the functionali...

Page 133: ...ine make sure that the gearshift and reversing gear levers are in neutral position A safety device does not allow the machine to be started with engaged gears or selected travel direction The machine is also equipped with an acoustic alarm that is activated when the operator with the engine running shifts the reversing gear lever from the neutral position with the seat rotated and not in the cor r...

Page 134: ...rting the engine with a different power source make the electrolyte melt and make sure that it isn t frozen any more and that there are no leaks 1 Turn the key to the preheating position for maximum 15 seconds in the coldest weather The preheating time is determined according to the out side temperature and the ratio is approx 1 second for each degree below 0 C 2 Press the accelerator pedal comple...

Page 135: ... immediately eliminated 3 6 4 HEATING THE HYDRAULIC OIL When warming up the engine especially in the cold season it is advisable to heat also the hydraulic system oil For this purpose when the coolant temperature has reached approximately 60 C proceed as follows 1 Press the front loader release button LED off see 3 3 2 pos 12 SERVO CONTROL LOCKING BUT TON 2 Lift and rotate the front bucket slowly ...

Page 136: ... oil and make sure that the sta bilizers have been raised and that both the front bucket and the backhoe are in transport position The control levers must be in the neutral position N At this point release the parking brake Proceed as follows 1 Select the travel direction by shifting the control lever 1 forward F or backward R 2 Select the gear by means of the gearshift lever 2 3 Accelerate gradua...

Page 137: ...fferential can be per formed even with the machine running straight at very low speed that is with the rear wheels turning at the same speed 3 6 5 2 ENGAGING THE FOUR WHEEL DRIVE WARNING q The four wheel drive must be engaged only with ma chine at rest or travelling at low speed q When travelling on roads or removing the machine dis engage the four wheel drive The four wheel drive can be engaged a...

Page 138: ... to be carried out are the following 1 Always check the work area for snow landslips gravel loose ground and anything that may suddenly modify the work conditions and the stability of the machine 2 When it is necessary to travel downhill the front bucket must always be directed downward in transport position 3 When loading or travelling uphill the front bucket must al ways be directed upward 4 Whe...

Page 139: ...ich you are working is sufficiently firm If it is necessary to work with the machine immersed in water make sure that the maximum depth does not exceed 50 cm and in any case that the engine cooling fan does not touch the water since it may get damaged or even break CAUTION q When working in water or on muddy ground lubricate the articulations more frequently than usual q After work remove any dirt...

Page 140: ...ly wide space 2 Shift the reversing gear lever to position N and apply the parking brake 3 Rest the front bucket and the backhoe bucket onto the ground if this is not possible because the space is insuffi cient the backhoe must be folded in the transport position and secured with the appropriate lock 4 Press the servo control locking button LED on 5 Engage the safety lock of the mechanical control...

Page 141: ...und 2 Shift the reversing gear lever to position N and apply the parking brake 3 Operate the backhoe controls until the bucket teeth are in digging position and thrust them into the ground 4 Press the servo control locking button LED on 5 Engage the safety lock of the mechanical controls NOTE q On machines equipped with backhoe servo controls all movements are inhibited when the servo control lock...

Page 142: ...the engine idle at a minimum speed of 1200 1300 rpm for about 5 minutes in order to allow it to cool down gradually before stopping it Before stopping the engine proceed as follows 1 Rest the front loader and backhoe equipment onto the ground 2 Shift the levers to the neutral position and connect the safety devices 3 Shift the hand accelerator lever to the idling position 4 Shift the reversing gea...

Page 143: ...q Position the ramps with a maximum inclination of 15 q Remove any trace of oil grease or ice from the ramps and the loading board q Do not change direction when the machine is already on the ramps if necessary go down and find the correct direction 1 The machine must get on the ramps with the front bucket 1 directed forward and lifted from the ground 2 After loading the machine on the truck lower...

Page 144: ...ring transport the machine must be secured to the vehicle with closed doors and windows 1 Check the overall dimensions of the means of transport the height width and weight of the means of trans port machine included must be compatible with the road and any tunnel underpass bridge electric or tele phone line that may be found on the way 2 Keep to the regulations in force regarding signals speed li...

Page 145: ...ICANTS 3 10 2 COOLANT WARNING q The coolant containing antifreeze is flammable do not smoke and do not use naked flames during the checks and when preparing the mixture 1 Use only red permanent antifreeze suitable for aluminium radiators Pure red antifreeze must be diluted with water 50 to ensure protection down to 36 C 2 Do not mix different brands of antifreeze 3 The use of red permanent antifre...

Page 146: ...w forward and reverse move ments and operate all the bucket and backhoe cylinders slowly more than once These operations serve to warm up and fluidize the oil in the hydraulic circuit the transmission the axles and the brakes 3 10 5 PRECAUTIONS TO BE TAKEN AT THE END OF WORK 1 Remove mud and water completely from the machine body Park the machine on firm ground if the machine must be parked near b...

Page 147: ...antifreeze requires only the check of the level and the periodical change of the flu id For the relevant specifications see 4 3 FUEL COOLANT AND LUBRICANTS 2 Make sure that the cooling fan belt is in good conditions 3 Make sure that the fins of the radiator and of the heat exchanger are clean 4 Check the radiator cap gasket and spring in case of doubt regarding tightness and setting change the cap...

Page 148: ...l 2 If the machine is provided with automatic RETURN TO DIG device the horizontal parallel position of the bucket with re spect to the ground is determined by the sensor 3 located on the cylinder and is reached when the sensor does not detect the rod 1 any longer In case of malfunction of the device check and if necessary carry out the required adjustments To adjust the sensor see 4 8 1 m ADJUSTIN...

Page 149: ... loader hydraulic sys tem to accelerate the operations if such device is provid ed Once the device has been connected it lowers the arm completely and at the same time brings the bucket in per pendicular position with respect to the ground This is par ticularly useful for the operator since in this way the machine is ready for the successive loading phase For the correct use of the return to dig d...

Page 150: ...ps may come off always use gloves goggles and helmet q The change of the equipment must be carried out by two persons who must decide together the words and sig nals to be used during operations q Avoid using your fingers to align the holes since the may be injured or even cut off q The described procedures are valid also for the cou pling of the mechanical connections of the optional equipment 1 ...

Page 151: ...ays fasten the safety belt before starting any manoeuvre q Always lower the stabilizers before starting any digging operation q Before starting work alert the persons in the vicinity by means of the horn integrated in the side dash board or in the left backhoe control lever if the machine is equipped with backhoe servo controls 3 13 1 POSITIONING THE BUCKET ACCORDING TO THE WORK THAT MUST BE CARRI...

Page 152: ...DING THE BACKHOE UNIT SIDEWARDS 2 Remove the boom anti rotation pin introduce it in the apposite hole and release the boom from the safety lock 3 Lower the front bucket 1 to the ground force this movement until lifting the front wheels 2 in order to trans fer the weight onto the bucket Apply the parking brake 4 Rotate the seat by 180 fasten the safety belt accelerate up to 1500 1600 rpm and lower ...

Page 153: ... Swing the boom 2 against the machine 4 Manoeuvre the bucket 3 and the arm 4 until the bucket teeth are perpendicular to the ground when arm and boom form an angle of approx 90 plant the bucket teeth onto the ground 5 Release the backhoe unit see 3 3 6 pos 9 BACKHOE SLIDING LOCK SWITCH 6 Make the unit slide by manoeuvring the arm CAUTION q Carry out this manoeuvre by operating the arm opening fold...

Page 154: ...ili tate the filling of the bucket and therefore increase productivity 4 The removal depth must be correct and suitable to the type of ground excessive depth may lock the move ments overload the engine and the pump and slow down the digging operations 5 To dump on heaps dump the bucket as soon as it gets near the dumping area the inertia resulting from the movement will ensure the compaction of th...

Page 155: ...the mechanical connections of the optional equipment 1 Position the bucket on level ground directing it so that the flat part of the bucket back rests on the ground 2 Remove first the tie rod pin 1 and then the arm connec tion pin 2 3 Change the bucket taking care to clean the pins and bushings perfectly and to grease the pins slightly before reinstalling them IMPORTANT q Install the arm connectio...

Page 156: ... use naked flames near the machine Place a container under the machine to gather the fuel and prevent it from spreading around If some fuel should be spilled clean the dirty area immediately IMPORTANT q To protect the cylinder rods when the machine is not used position the work equipment as shown in the figure This serves to prevent the cylinder rods from rusting RKA14670 ...

Page 157: ...lic circuits and the lubricants axles reduction gears converter following the indications given in the maintenance instructions 3 Change all the filtering elements air filter engine oil filter hydraulic circuit filters fuel filter 4 To prevent the deformation of the tyre sidewalls insert supports or blocks under the axles to nullify the weight of the machine 5 Grease the exposed rods of the hydrau...

Page 158: ...mes when preparing the engine for a long period of in activity 7 Loosen the alternator fan and coolant pump belts 8 Reconnect the fuel pump intake pipe to the fuel tank 9 Seal the exhaust pipe and all the intake and breather openings with adhesive tape and vynil bags 10 Position a sign with the clear writing NO ENGINE OIL on the steering wheel and on the engine IMPORTANT q These operations must be...

Page 159: ...ngine by proceeding as indicated in paragraph 3 6 2 STARTING THE ENGINE and make sure that the engine oil pressure warning light goes out when the starter has run for approx 5 seconds 10 After starting the engine let it idle for 15 minutes 11 Warm up the hydraulic cylinders by slowly lifting and extending all the equipment more than once 3 14 5 AFTER THE PERIOD OF INACTIVITY Considering that diffe...

Page 160: ...in mud and cannot get out using only its motive power or in case of breakdown use a wire rope as shown in the figures on the right IMPORTANT q Before recovering the machine shift the gear lever to neutral disengage the four wheel drive and release the parking brake 3 15 2 AFTER THE FUEL HAS RUN OUT Before starting the engine when the fuel has run out and therefore air has entered the fuel supply c...

Page 161: ...ely rinse the involved part with plenty of water If the acid gets into the eyes immediately rinse with plenty of water and consult a doctor without delay q When working on the battery always wear goggles and gloves q When removing the battery disconnect first the earth cable when installing the battery connect first the positive cable q If a tool makes contact with the positive terminal and the ma...

Page 162: ...used as starting aid must have greater capacity or at least the same capacity as the battery of the machine to be started q Make sure that the cables and pliers are neither corroded nor damaged q Make sure that the pliers hold the terminals firmly CONNECTING THE CABLES AND STARTING THE ENGINE 1 Make sure that the ignition key is in position 2 Connect the positive poles of the two batteries with ea...

Page 163: ...harge battery Change Starter pinion engages and then disen gages Battery charge insufficient Charge battery Starter makes engine run slowly Battery charge insufficient Faulty starter Charge battery Change Starter disengages before engine has started Faulty cables Battery charge insufficient Check and repair Charge battery Engine oil pressure warning light does not come on when engine is stopped ig...

Page 164: ...lean element and seat Change Change rings Clean valve carefully Pump delivery insufficient Oil level too low Suction filter clogged Faulty pump Top up Clean filter Change Overheating Damaged rings Faulty pump Oil level too low Dirty heat exchanger Damaged heat exchanger Remove disassemble and reas semble the unit Change Top up Clean Change Noisy converter Faulty pump Damaged bearings Change Remove...

Page 165: ...el supply circuit Other causes Change Check pipes connections fuel and injection pumps Bleed circuit Contact Dealer Engine overheats Radiator clogged Insufficient tension of water pump and fan belts Low coolant Air filters clogged Clean fins Check and adjust belt tension Top up Clean or change filters Engine power insufficient Impurities or water in fuel supply cir cuit Fuel filter clogged Air fil...

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Page 167: ...MAINTENANCE 165 ...

Page 168: ...ions for arc welding 1 Turn the ignition key to position O 2 Disconnect the battery first the negative pole and then the positive pole 3 Disconnect the alternator 4 Do not apply more than 200V continuously 5 Connect the earth cable within 1 m from the point where the welding operation must be carried out 6 Avoid placing gaskets and bearings between the welding area and the earth cable q Do not use...

Page 169: ...G q Oils filters coolant gaskets electric wires and batteries are considered special waste and must be col lected and disposed of according to the regulations in force q The combustible material of some components may become extremely dangerous if it burns For this reason avoid any contact of burnt material with your skin or eyes and do not inhale the fumes see 2 8 PRECAUTIONS TO BE TAKEN DURING M...

Page 170: ...con ditions check the coolant level in the expansion tank daily and top up when necessary q The coolant containing antifreeze is flammable do not use naked flames near the coolant and do not smoke while topping up FLUID SPECIFICATIONS Engine oil SAE 15W 40 Specifications API CI 4 ACEA E7 Hydraulic system oil SAE 10W 30 Specifications API CF CF2 CD Biodegradable hydraulic system oil Only for machin...

Page 171: ...re not to draw condensate from the drum bottom q If fuel runs out or if the fuel filter has been replaced it is necessary to bleed the circuit 4 2 2 NOTES REGARDING THE HYDRAULIC SYSTEM q Be extremely careful when performing maintenance operations on the hydraulic system since soon after work the oil is very hot The circuit is pressurized not only during work but also at the end of work q The main...

Page 172: ...nstallation of any op tional equipment contact your Komatsu Dealer q If any electric welding operation has to be carried out disconnect the battery and the alternator 4 2 4 NOTES REGARDING LUBRICATION q Lubrication makes the operations carried out with the machine and work equipment smoother while preventing wear and the noise that may be produced if the joints are dry q Lubrication is to be carri...

Page 173: ... ITEM CODE DESCRIPTION Q ty CHANGE INTERVAL Hydraulic oil drain filter 42N 62 15470 Cartridge 1 EVERY 500 HOURS OF OPERATION Engine oil filter EA504074043 Cartridge 1 Fuel filter EA504073234 Cartridge 1 Converter oil filter CA0040952 Cartridge 1 EVERY 1000 HOURS OF OPERATION Air filter 848101189 848101190 Main cartridge Safety cartridge 1 1 WHEN REQUIRED WHEN REQUIRED Front bucket 312204054 801580...

Page 174: ...m OIL API CD CF CF2 98 40 Hydraulic system with biodegradable oil see 4 3 1 98 40 Front axle Differential OIL UTTO FLUID 7 7 Final reduction gear ea 0 75 0 75 Rear axle Differ ential and final re duction gears 15 15 Hydraulic transmission OIL GM DEXRON II D DEXRON is a registered trade mark of General Motors Corpora tion 20 20 Braking system 0 8 0 8 Fuel tank DIESEL OIL 150 Engine cooling system P...

Page 175: ...ydraulic circuit in the transmission in the axles and in the brakes First filling quantity total quantity of oil including the oil for the components and pipes Oil change quantity quantity of oil necessary to fill the system or unit during the normal inspection and mainte nance operations ASTM American Society of Testing and Materials SAE Society of Automotive Engineers API American Petroleum Inst...

Page 176: ...t be used for the engine the trans mission the braking system etc q Before introducing biodegradable oil in the hydraulic system empty the system completely disconnect ing the cylinders and all the parts that may contain conventional oil and replace the drain filter with a new one q Start the engine and let it idle without using the work equipment wait until the oil reaches a temperature of at lea...

Page 177: ...iving torque table is not valid for screws or nuts that must fasten parts made of nylon or similar materials onto washers or components made of nylon or nonferrous metals or requiring specific driving torques RYA02980 Thread diameter a mm Pitch mm Wrench size b mm 8 8 10 9 kgm Nm kgm Nm 6 8 10 12 14 1 1 25 1 5 1 75 2 10 13 17 19 22 0 96 0 1 2 3 0 2 4 6 0 5 7 8 0 8 12 5 1 9 5 1 23 2 45 4 9 77 8 122...

Page 178: ...Nm Cab Front support screws Rear support screws 20 4 1 20 4 1 200 9 8 200 9 8 Wheels Front Rear 28 5 1 51 1 280 9 8 500 9 8 Front bucket Teeth 16 1 157 9 8 Backhoe bucket Central teeth Side teeth 16 1 16 1 157 9 8 157 9 8 Engine and transmission Front support central screw Rear support central screw 20 1 20 1 196 9 8 196 9 8 RKA12600 a Thread diameter mm a Wrench size mm DRIVING TORQUE kgm Nm 9 16...

Page 179: ...type of lubricant to be used is indicated in the lubricant chart see 4 3 FUEL COOLANT AND LU BRICANTS 19 1 2 3 4 5 6 7 10 19 9 8 11 12 13 14 15 17 12 13 14 15 16 17 18 10 11 500h check change 17 1 2 12 3 4 5 6 7 8 11 15 14 9 19 10 18 16 13 10h 50h 250h 1000h 2000h 42N 93 11210 RKA15780 Hydraulic oil Grease Engine oil Transmission oil Brake oil ...

Page 180: ...5 1 LUBRICATION DIAGRAM q The points indicated are symmetrical and must be lubricated every 10 hours of operation q The fork sliding bars and the safety pins must be lubricated with grease only to protect them from oxida tion q The fork joints A must be lubricated only if the forks are used 10 h A RKA15470 Grease Grease ...

Page 181: ...ICATION DIAGRAM front bucket quick couplings IMPORTANT q For the other greasing points see 4 5 1 LUBRICATION DIAGRAM q The points indicated are symmetrical and must be lubricated every 10 hours of operation RWAA9200 10 h Grease ...

Page 182: ...LUBRICATION 180 4 5 4 LUBRICATION DIAGRAM offset device IMPORTANT q For the other greasing points see 4 5 1 LUBRICATION DIAGRAM RKA14130 10 h Grease ...

Page 183: ...ts immediately in case of failures or anomalies even if the time interval prescribed for their change has not elapsed yet If the pipe clamps show signs of deterioration like deformations or cracks change them together with the pipes In addition to the periodical change of the components listed in the following page the inspections described here below are to be carried out on the hydraulic pipes I...

Page 184: ...be changed see the spare parts catalogue q When changing pipes always change O rings gaskets and analogous components 4 6 1 1 FUEL SYSTEM No Safety related components that periodically need changing Q ty Change interval 1 Fuel pipe Fuel tank Fuel pump 1 Every 2 years or 4000 hours whichever occurs first 2 Fuel pipe Injection pump Fuel tank 1 RKA14150 2 1 ...

Page 185: ...D COMPONENTS 183 4 6 1 2 DELIVERY HYDRAULIC SYSTEM No Safety related components that periodically need changing Q ty Change interval 1 Hydraulic pipe Hydraulic pump distributor 1 Every 2 years or 4000 hours whichever occurs first RKA14160 1 ...

Page 186: ...TEM No Safety related components that periodically need changing Q ty Change interval 2 Hydraulic pipes Cylinders loader arm 4 Every 2 years or 4000 hours whichever occurs firs 3 Hydraulic pipes Cylinders loader bucket 4 4 Hydraulic pipes Cylinders 4in1 bucket 4 RKA14170 4 4 4 2 2 2 3 4 3 3 ...

Page 187: ... SYSTEM No Safety related components that periodically need changing Q ty Change interval 5 Hydraulic pipes Cylinder backhoe boom 2 Every 2 years or 4000 hours whichever occurs firs 6 Hydraulic pipes Cylinder backhoe arm 2 7 Hydraulic pipes cylinder backhoe bucket 4 RKA14180 7 6 5 ...

Page 188: ...ERIODICAL CHANGE OF THE SAFETY RELATED COMPONENTS 186 4 6 1 5 OPERATOR S SAFETY No Safety related components that periodically need changing Q ty Change interval 1 Safety belt 1 Every 4 years 1 RWA31240 ...

Page 189: ... 197 MAINTENANCE INTERVALS IN CASE OF USE OF THE DEMOLITION HAMMER a CHANGING THE HYDRAULIC OIL FILTER 198 b CHANGING THE HYDRAULIC OIL 198 CHECKS TO BE CARRIED OUT BEFORE STARTING THE ENGINE a VARIOUS CHECKS 199 b CHECKING THE COOLANT LEVEL 199 c CHECKING THE FUEL LEVEL 200 d CHECKING THE ENGINE OIL LEVEL 200 MAINTENANCE EVERY 10 HOURS OF OPERATION a LUBRICATING THE JOINTS 201 MAINTENANCE AFTER T...

Page 190: ...ANGING THE ENGINE OIL FILTER 214 c CHANGING THE HYDRAULIC SYSTEM OIL FILTER 214 d CHANGING THE FUEL FILTER 217 e DRAINING THE FUEL TANK 218 f DRAINING THE HYDRAULIC OIL TANK only for machines in which synthetic biodegradable oil type HEES is used 219 g CLEANING THE OUTSIDE OF THE RADIATOR 220 h CLEANING THE OUTSIDE OF THE A C CONDENSER only for machines with air conditioner 221 MAINTENANCE EVERY 1...

Page 191: ...engine hood see 3 5 1 ENGINE HOOD To clean the primary element proceed as follows 1 Release the safety retainer 1 moving it toward the outside 2 Turn the cover 2 counterclockwise by approximately 12 5 3 Lift the cover 2 and extract the filtering element 3 4 Slightly strike the filtering element 3 on the palm of your hand in such a way as to remove the dust and blow com pressed air on the inner sur...

Page 192: ...ove making sure that all the filter components are perfectly secured 4 Push the safety lock 1 towards the inside 4 8 1 b CHECKING AND CLEANING THE CAB AIR FILTER WARNING q Wear safety goggles during the cleaning operations The air suction for the ventilation of the cab is protected by a filter positioned on the right side of the cab This filter blocks all the impurities contained in the air and mu...

Page 193: ...om getting into the suction duct 4 Put back the filtering element 3 the container of the storage compartment 2 and close the door 1 IMPORTANT q If the filtering element is excessively clogged or damaged change it with a new one 4 8 1 d CHECKING THE DETERGENT LEVEL IN THE WINDSHIELD WASHER RESERVOIR The reservoir 1 is positioned inside the engine compartment and contains detergent for the front and...

Page 194: ...the grease to use see 4 3 FUEL COOLANT AND LUBRICANTS CAUTION q Inject grease until all the residual old grease has come out q After lubrication remove all the grease that has come out and clean the area 4 8 1 g FUSES AND RELAYS CHECK AND CHANGE IMPORTANT q When changing a fuse make sure that the ignition key is in position q If the fuses are oxidized corroded or do not fit perfectly in their seat...

Page 195: ...king system reaches the maximum level 5 Press the left brake pedal thoroughly and keeping it pressed loosen the drain screw 1 of the corresponding brake until the pedal reaches the end of stroke Use a 13 mm wrench 6 While keeping the pedal completely pressed tighten the drain screw 1 7 Release the brake pedal wait a few seconds and repeat the operations described above until no air bubbles can be ...

Page 196: ...o check also the conditions of the articulated heads 3 if a consid erable slack is observed change them immediately 4 8 1 j CHECKING THE BRAKING EFFICIENCY IMPORTANT q During running in check the braking efficiency after the first 100 hours of operation q Perform this check on firm level ground with no people or obstacles around This check must be carried out after setting the work equipment in th...

Page 197: ... ENGINE 2 Align the machine in travel position on a straight road section and proceed up the slope with 20 gradient 3 Stop the machine with the service brake shift the reversing gear lever 1 to the neutral position N and stop the engine 4 Apply the parking brake lock position release the service brake slowly and make sure that the machine does not move ADJUSTMENT 1 With the engine off release the ...

Page 198: ...s lock them in this position Use a 22 mm wrench 4 8 1 m ADJUSTING THE AUTOMATIC RETURN TO DIG DEVICE OF THE FRONT BUCKET if installed The device for the automatic return of the front bucket to the dig ging position automatically brings the front bucket to the loading position when it is lowered to the ground The sensor is positioned on the right dumping cylinder and deter mines the horizontal posi...

Page 199: ...s included between 0 5 and 1 0 mm If the slack exceeds the values indicated loosen the screws 3 remove the adjusting plate 4 and remove one or more washers 5 from both the adjusting points according to the needs Once they have been removed the washers 5 must be po sitioned again between the adjusting plate 4 and the screws 3 During the adjustment check the condition of the adjusting element 2 and ...

Page 200: ...indications given in the table on the right If the machine contains synthetic biodegradable oil type HEES the filter must be changed after the first 50 hours of operation 4 8 2 b CHANGING THE HYDRAULIC OIL Change the hydraulic oil in the tank according to the intervals indi cated in the table on the right On machines containing synthetic biodegradable oil type HEES change the oil after the first 5...

Page 201: ...bility of the warning plates 8 Make sure that the ladders and handles used to reach the driver s seat and the inside of the cab are clean 4 8 3 b CHECKING THE COOLANT LEVEL WARNING q Do not remove the radiator cap the coolant level must be checked with cold engine through the expansion tank The coolant level must be checked on the expansion tank 1 when the engine is cold and must be included betwe...

Page 202: ...lling screw the filler cap 2 thoroughly and lock it 4 8 3 d CHECKING THE ENGINE OIL LEVEL WARNING q Soon after the machine has been stopped the engine is very hot and may cause burns let the engine cool down before carrying out any check The dipstick 1 can be reached after opening the engine hood See 3 5 1 ENGINE HOOD The oil level must be checked with cold engine and the machine parked on level g...

Page 203: ...FUEL COOLANT AND LUBRI CANTS and 4 5 1 LUBRICATION DIAGRAM IMPORTANT q As a general rule it is important to consider that each cylinder is provided with two grease nipples posi tioned on the couplings and that each pin serving as fulcrum point for a movement is provided with at least one grease nipple POINTS TO BE LUBRICATED ON THE FRONT LOADER RKA14240 7 2 9 8 12 11 10 6 1 3 5 4 1 4in1 bucket ope...

Page 204: ...arm extension cylinder base pin 1 point 6 Bucket cylinder base pin 1 point 7 Telescopic arm extension cylinder head pin 1 point 8 Bucket cylinder head and lever tie rod coupling pin 3 points 9 Tie rod bucket coupling pin 2 points 10 Bucket fulcrum pin 1 point 11 Lever fulcrum pin 1 point 12 Arm fulcrum pin 1 point 13 Arm cylinder head pin 1 point 14 Boom fulcrum pin 2 points 15 Boom swing cylinder...

Page 205: ...ing position q If it is necessary to top up stop the engine and eliminate the residual pressure from the equipment circuits by mov ing the controls more than once and from the tank by slowly loosening the filler cap 2 The oil level must be visible through the window 1 provided on the tank and must be included between the MIN and MAX marks If the level is near the MIN reference mark open the engine...

Page 206: ...tightness and make sure that there are no air leakages from the pipe that con nects the radiator to the expansion tank If the problem persists contact your Komatsu Dealer 4 8 6 c CHECKING THE BRAKING SYSTEM OIL LEVEL This operation must be carried out when the warning light 1 on the front instrument panel comes on see 3 3 1 pos 8 LOW OIL PRESSURE OR BRAKING SYSTEM FAILURE WARNING LIGHT The brake f...

Page 207: ...ning the grease nipples by applying the grease pump filled with the prescribed grease See 4 3 FUEL COOLANT AND LUBRICANTS and 4 5 1 LU BRICATION DIAGRAM Once the lubrication procedure has been carried out make sure that all the points have been lubricated and remove the used grease that may have spread out of the joints IMPORTANT q If the machine is used in difficult conditions carry out this oper...

Page 208: ...5 1 LU BRICATION DIAGRAM Once the lubrication procedure has been carried out remove the contaminated grease that may have spread out of the joints and of the central coupling 4 8 6 f CHECKING THE TYRE PRESSURE WARNING q Inflate the tyres only after positioning them in a protection cage q Stand beside the tyre to inflate it q Do not exceed the pressure values indicated in the techni cal data sheet ...

Page 209: ...sate and must be car ried out with full tank in order to prevent air from entering the fuel circuit The condensate must be drained at the end of work before the engine has completely cooled down in order to prevent it from freezing if the temperature drops considerably The water separator can be reached after removing the engine hood see 3 5 1 ENGINE HOOD Drain the condensate by loosening the plug...

Page 210: ...F OPERATION and 4 8 11 MAINTENANCE EVERY 1000 HOURS OF OPERATION For checks and adjustments contact your Komatsu Dealer 4 8 8 MAINTENANCE EVERY 250 HOURS OF OPERATION Carry out the following operations together with those to be performed every 50 HOURS 4 8 8 a CHECKING THE ALTERNATOR FAN BELT WARNING q Carry out this checking and maintenance operation only with cold engine The belt 1 can be reache...

Page 211: ...1 at the centre of the section between the compressor 2 and the pulley 3 If the pressure exerted is approximately 10 kg the resulting de flection must be approx 5 6 mm When the belt is new the resulting deflection must be approx 4 mm If the resulting deflection exceeds the values indicated proceed as follows 1 Remove the belt guard 4 2 Loosen the screw 5 that fastens the cam 6 3 Loosen the screw 7...

Page 212: ...rolyte level in each cell must be about 6 mm above the plate edge if necessary remove the cell caps and top up using exclusively distilled water If on the contrary the level is low because some fluid has been spilled add electrolyte with concentration suitable for the ambient temperature see 3 10 3 BATTERY NOTE q When adding distilled water or electrolyte do not exceed the level indicated This wou...

Page 213: ...d position which is indispensable for an accurate check This a visual check and serves to verify if the lubricant reaches the hole 2 if necessary top up using the prescribed oil see 4 3 FUEL COOLANT AND LUBRICANTS Use a 17 mm wrench 4 8 8 e CHECKING THE REAR AXLE OIL LEVEL WARNING q Carry out this check with the machine parked on a level surface and the work equipment resting on the ground This ch...

Page 214: ...the oil at running temperature The oil must always reach the maximum level or be very near it Top up through the opening used for the dipstick 1 using the prescribed oil see 4 3 FUEL COOLANT AND LUBRICANTS 4 8 8 g CHECKING THE WHEEL NUT DRIVING TORQUE This check serves to restore the correct driving torque of the wheels on the hubs The driving torque must be checked by means of a torque wrench 1 s...

Page 215: ...ing the oil change will make the ground slippery therefore use anti slip shoes and im mediately remove any trace of oil from the floor q Oils filters the coolant and the battery are considered spe cial waste and must be collected and disposed of accord ing to the regulations in force When changing the engine oil change also the filter see 4 8 10 b CHANGING THE ENGINE OIL FILTER Proceed as follows ...

Page 216: ...he filter rests against the seal 4 Give another half turn by hand Start the engine make sure that there are no leakages and that the low oil pressure warning light goes out IMPORTANT q Do not use the wrench to lock the filter in order to avoid damaging the filter itself and causing oil leakages 4 8 10 c CHANGING THE HYDRAULIC SYSTEM OIL FILTER WARNING q Soon after the machine has been stopped the ...

Page 217: ...ler cap 4 to release any residual pres sure 4 Remove the cap 5 and gather the oil that flows out approx 1 2 litre Use a 19 mm socket wrench 5 Remove the filter housing 6 and collect the residual oil from the inside approx 1 litre Use a 42 mm socket wrench 6 Remove the cartridge 7 and carefully clean the housing 7 Clean the contact surface between the seal and the filter sup port 8 Install a new ca...

Page 218: ...in machines used for simple digging operations On new machines change the filter after the first 100 150 hours of operation and for the successive changes keep to the indications given in the table on the right 0 20 40 60 80 100 500 100 800 Breaker operating ratio Replacement interval H Replacement interval for element RWA10710 ...

Page 219: ...e seal and screw thoroughly until the filter rests against the seal 4 Give another half turn by hand 5 Bleed the fuel circuit BLEEDING THE CIRCUIT After refuelling proceed as follows 1 Turn the ignition key to position 2 Loosen the bleeder screw 3 on the filter housing head 2 3 Operate the fuel pump 4 and keep it running until no more air can be observed in the fuel that flows out of the filter he...

Page 220: ...n the fuel level on the indicator is above the reserve mark Its pur pose is to let out any impurity and condensate that may have accumulated in the fuel tank without let ting air into the engine fuel supply lines 1 To let the condensate flow out loosen the drain plug 1 and wait until no more water is present in the fuel that flows out IMPORTANT q The tank must be drained before starting the engine...

Page 221: ...ust be collected and dis posed of according to the regulations in force This operation serves to let the condensate accumulated on the tank bottom flow out of the tank itself for this purpose carry out the following operations in the given sequence 1 Open the engine hood see 3 5 1 ENGINE HOOD and loosen the filler cap 1 to release any residual pressure from the tank 2 Remove the drain plug 2 until...

Page 222: ...g cycle the specific detergents available on the market can certainly be used provided that the instructions given on the package are fol lowed and that the washed parts are carefully dried After washing put back the front guard 1 IMPORTANT q Do not use products containing even a slight quantity of oily substances since these facilitate the adhesion of dust which affects the heat exchange adversel...

Page 223: ...shing cy cle the specific products available on the market can certainly be used provided that the instructions given on the package are fol lowed and that the washed parts are carefully dried IMPORTANT q Do not use products containing even a slight quantity of oily substances since these facilitate the adhesion of dust which affects the heat exchange adversely q Carry out this operation whenever ...

Page 224: ...ain plug 2 and let the used oil flow out com pletely gathering it into a container with suitable capacity While the oil flows out remove the plug 1 Use a 17 mm wrench 2 Once the oil has been drained put back the drain plug 2 and add oil of the prescribed type through the hole 1 until reaching the level corresponding to the lower edge of the hole itself 3 Put back the plug 1 FINAL REDUCTION GEARS 1...

Page 225: ...used oil flow out completely gathering it into a container with suitable capacity While the oil flows out remove the level plug 1 Use a 1 2 square wrench 2 Remove the plug 3 of each reduction gear and gather the used oil into a container with suitable capacity Use a 17 mm wrench 3 Once the oil has been drained put back the drain plug 2 the plug 3 and add oil of the prescribed type through the hole...

Page 226: ...mission oil change also the filter see 4 8 11 d CHANGING THE HYDRAULIC TRANSMISSION OIL FILTER Proceed as follows 1 With the machine at operating temperature stop the engine open the engine hood see 3 5 1 ENGINE HOOD and ex tract the dipstick 2 2 Remove the drain plug 1 and let the oil flow into a container with suitable capacity Use a 1 2 square wrench 3 Remove the filter 3 and change it see 4 8 ...

Page 227: ...after the first 250 hours of operation and successively eve ry 1000 hours Carry out this operation whenever the transmission oil is changed Proceed as follows 1 Raise the front mat and remove the cover 1 Use a 13 mm wrench 2 Unscrew and remove the old filter 2 by means of the special wrench provided 3 Clean the contact surface between the seal and the filter sup port 3 4 Lubricate the seal fit it ...

Page 228: ...ilters the coolant and the battery are considered spe cial waste and must be collected and disposed of accord ing to the regulations in force 1 Open the engine hood see 3 5 1 ENGINE HOOD and slowly loosen the filler cap 1 to release any residual pres sure from the tank then remove it 2 Remove the drain plug 2 and let the oil flow out gathering it into a container with suitable capacity Use a 41 mm...

Page 229: ...ine making each piston move several times in order to bleed the system Stop the machine in maintenance position check the oil level again and top up if necessary Always use oil of the prescribed type see 4 3 FUEL COOL ANT AND LUBRICANTS 14 Close the engine hood IMPORTANT q Do not start the engine with empty tank since this would certainly damage the pump q In machines equipped with demolition hamm...

Page 230: ...regulations in force IMPORTANT q The change of the permanent coolant does not require any washing cycle to descale the circuit 1 Open the engine hood see 3 5 1 ENGINE HOOD 2 Loosen and remove the upper cap 1 of the radiator 3 Open the drain cock 2 of the radiator and let the fluid flow out gathering it into a container with suitable capacity Drain the expansion tank 3 while the fluid flows out 4 C...

Page 231: ... be carried out with the machine positioned on level ground and parking brake applied Drain the oil and wash the system proceeding as follows 1 Apply a small pipe for the collection of the oil to the drain screws 1 and loosen them Use a 13 mm wrench 2 Remove the front guard 2 and the cap 3 3 Operate the brake pedals connected with each other until the oil contained in the reservoir 3 runs out 4 Fi...

Page 232: ...nditioning system is very dangerous If it is sprayed into the eyes or in case of contact with the skin it may cause blindness or frostbite To avoid any explosion do not gener ate sparks and do not use naked flames near the air conditioner q Oils filters the coolant and the battery are considered special waste and must be collected and dis posed of according to the regulations in force q Maintenanc...

Page 233: ...AINING SCREWS AND DAMPING ELEMENTS This procedure must be carried out by qualified personnel Have this operation performed by your Komatsu Deal er 4 8 13 b CHECKING AND ADJUSTING THE ENGINE VALVE CLEARANCE AND THE INJECTION TIMING ADVANCE Since these checks and adjustment operations require the use of special tools have these operations carried out by qualified personnel supplied by your Komatsu D...

Page 234: ...according to the regulations in force q Have the dewatering filter changed only by specialized personnel and for this purpose contact your Ko matsu Dealer The filter 1 must be changed every 4000 hours of operation or every 2 years whichever occurs first The filter must also be changed whenever operations involving the opening of the air conditioning system are performed 4 8 14 b CHECKING THE OPERA...

Page 235: ...TECHNICAL SPECIFICATIONS 233 ...

Page 236: ...CAL DATA 5 1 1 STANDARD OVERALL DIMENSIONS 5 1 1 1 OVERALL DIMENSIONS WITH STANDARD ARM 5 1 1 2 OVERALL DIMENSIONS WITH TELESCOPIC ARM 2190 2175 6035 1670 2900 200 3650 2340 RKA14270 2340 200 2900 3880 RKA14280 2190 2175 1670 6035 ...

Page 237: ...gine model S4D104E 3 Maximum power 2200 rpm EEC 80 1269 kW 74 Maximum torque 1400 100 rpm EEC 80 1269 Nm 398 ELECTRICAL SYSTEM Alternator 12V Electrical output 95 A Grounding negative Battery 160 12V Starter kW 3 0 TRAVEL SPEED calculated with 16 9 30 tyres and engine at 2200 rpm The machines destined to the Italian and German markets are not homologated with 4th reverse gear FORWARD REVERSE GEARS...

Page 238: ... Good Year bar 2 70 365 70 R18 SPT9 Dunlop bar 3 75 320 80 R18 IT530 134A8 Good Year bar 3 20 REAR TYRES SIZE MAKE INFLATION PRESSURE Recommended 16 9 28 PR10 Good Year Mitas Ecomega bar 2 20 16 9 28 PR12 Mitas Ecomega bar 2 60 16 9R28TL 151A8 Michelin bar 3 10 16 9 30 PR10 bar 2 20 440 80 R28 IT530 156A8 Good Year bar 3 20 ...

Page 239: ...ine positioned on firm and flat ground 5 1 3 1 SYMBOL TABLE A Standard arm length L 1900 mm B Telescopic arm completely retracted C Telescopic arm completely extended D Standard operating weight E Standard backhoe bucket width and weight W 600 mm 160 kg F Operating hydraulic pressure G Lowered stabilizers P Lifting capacity Z Distance of the lifting point from the ground X Distance between the boo...

Page 240: ... 1 m 2 m 1 m 0 1 m 24 5 MPa 245 Bar W 600 mm 160 Kg 7460 Kg D F E G A B C W 990 990 990 725 990 990 990 700 990 990 990 680 990 990 990 650 990 990 990 550 990 990 990 530 990 990 990 500 990 990 990 475 990 990 875 375 990 990 850 360 990 990 825 340 990 990 800 320 1000 Kg RKA14290 Z X P 1900 Min Max ...

Page 241: ...TECHNICAL DATA 239 5 1 3 3 LIFTING CAPACITIES TELESCOPIC ARM ...

Page 242: ...240 THIS PAGE WAS INTENTIONALLY LEFT EMPTY ...

Page 243: ...AUTHORISED OPTIONAL EQUIPMENT 241 ...

Page 244: ...ions Komatsu declines any responsibility for accidents or damage WARNING q When removing or installing any equipment take the following precautions and be careful to ensure that operations are carried out in total safety q Carry out installation and removal on a firm and flat surface q When the operations are carried out by two or more operators decide the communication signals in ad vance and res...

Page 245: ...tability of the machine If it is necessary to travel up or down a slope proceed very carefully since the machine may lose its bal ance and overturn q When work equipment with overall dimensions exceeding those of the standard equipment is installed be particularly careful since more space is necessary for the movements of the equipment and of the machine ...

Page 246: ...e capacity stamped on the forks see 6 4 PAL LET FORKS a Measure referred to the equipment diameter e Measure referred to the equipment length EQUIPMENT MAX WEIGHT kg MAX DIMENSIONS MAX ISO CAPACITY m3 MAX OPERATING PRESSURE bar MAX FLOW RATE l min Width mm Height mm Front bucket 450 2320 940 1 1 Front 4 in1 bucket 750 2340 1015 1 0 200 75 Forks on front bucket 190 q q T Pallet forks 320 1800 800 t...

Page 247: ...se position to withdraw the coupling pins completely 2 Start the machine and position the equipment carrier 2 perpendicular to the equipment to be installed 3 Using the bucket control lever 3 position the fixed rod 4 of the equipment carrier under the upper seats 5 on the bucket 6 4 Lift the arm 7 and engage the fixed rod 4 in the upper seats 5 lift the bucket slightly 5 Turn the lever 1 completel...

Page 248: ...ssure by proceeding as follows 1 Turn the ignition key to position 2 Press the servo control locking button and make sure that the LED is off release position see 3 3 2 pos 12 SERVO CONTROL LOCKING BUTTON 3 Operate the loader arm control lever and the 4in1 bucket opening and folding buttons more than once 4 Turn the ignition key to position O q If any oil has been spilled wipe it up immediately in...

Page 249: ...ed by means of two hydraulic cylinders 1 controlled by an additional distribu tor The opening and folding of the bucket are controlled via two push buttons 5 and 6 positioned on the loader control lever 7 which also maintains all its normal functions see 3 3 6 pos 4 FRONT LOADER CONTROL LEVER 6 3 2 SAFETY DEVICES The 4in1 bucket is provided with teeth guard 3 If the bucket is equipped with pallet ...

Page 250: ...ing brake and elimi nate the residual pressure from the hydraulic circuits by proceeding as follows 1 Turn the ignition key to position 2 Press the servo control locking button and make sure that the LED is off release position see 3 3 2 pos 12 SERVO CONTROL LOCKING BUTTON 3 Operate the loader arm control lever and the 4in1 bucket opening and folding buttons more than once 4 Turn the ignition key ...

Page 251: ...IAL 2 Unloading on high surfaces by opening the bucket instead of overturning it vertical unloading 3 Handling logs branches etc with the grapple function opening and closing by using the teeth provided on the mobile jaw 4 to grasp them 4 Flushing and levelling with open bucket IMPORTANT q To flush the ground open the bucket and move the ma chine forward working with the fixed part of the bucket q...

Page 252: ... of the forks The allowed load is generally stamped on the forks 6 4 1 DESCRIPTION They are usually applied to the 4in1 bucket and when they are not used they must be overturned towards the back of the machine and secured with the safety pins provided The pallet forks 1 make it possible to use the machine as a normal lift truck and the controls to lift and oscillate them are the same used to contr...

Page 253: ... the material before lifting the load move the forks in such a way as to lift their prongs and there fore prevent the load from slipping DANGER q When the forks are overturned for use or storage be careful to the grasping points since hands and feet may be injured and even cut off If possible this operation should be carried out by two persons q Use the lifting oscillation and shifting controls sl...

Page 254: ... they are overturned in rest position the forks are firmly secured inside their respective sup ports 5 If any slack should be observed between the forks and the safety pin 3 immediately carry out the necessary adjust ment The correct adjusting procedure is as follows Release the stop nut 10 and loosen the adjusting screw 11 until taking up the slack between the fork and the safety pin 3 Use a 22 m...

Page 255: ...oved 3 Loosen and remove the screws 9 that fasten the slide bar 2 4 Hold one of the supports 8 and withdraw the slide bar 2 repeat the same operation for the other support 6 4 5 INSTALLING THE FORKS To install the pallet forks repeat the procedure described for the removal in the reverse order taking the same pre cautions 6 4 6 MAINTENANCE No specific maintenance operation is required for this dev...

Page 256: ...er unit the movements of the levers described in 3 3 6 1 pos 18 19 BACKHOE CONTROL LE VERS version with mechanical controls remain unchanged The movements of the telescopic arm are as follows 1 Extension of the arm obtained by pressing the pedal 3 with the toe 2 Retraction of the arm obtained by pressing the pedal 3 with the heel 6 5 1 2 CONTROL version with servo assisted backhoe In the version w...

Page 257: ...ty element 6 must be posi tioned as shown in Fig B 6 5 3 USING THE TELESCOPIC ARM WARNING q Before releasing and extending the arm make sure that the stabilizers rest on firm ground q If possible work with the backhoe centered on the guides and unload the material as near the machine as possible q If it is necessary to work with misaligned backhoe or with the backhoe completely shifted on the guid...

Page 258: ...e the ignition key q Adjust the screws and guides one by one q Do not place tools in the space between the safety locks and the arm 1 Position the machine on flat ground and lower the stabiliz ers 2 Lift the boom fold the bucket completely and extend the telescopic part 7 completely 3 Fold the arm until the slide guides 8 are perpendicular to the ground and in any case positioned so that the exten...

Page 259: ...9 by 270 3 4 turn and lock them with the lock nuts 10 8 Start the machine extend and retract the telescopic arm more than once to make sure that it slides correctly CAUTION q The wear limit allowed for the rubber blocks is repre sented by the minimum engagement of the adjusting dowels 9 in the lock nuts the rubber blocks must be replaced when the heads of the dowels 9 are 5 mm back with respect to...

Page 260: ... this way pressurized oil is conveyed into the cir cuit when the pedal is released the oil flow is interrupted and therefore the hammer stops 6 6 1 2 CONTROL version with servo assisted backhoe In the version with servo controls the hammer is operated via the small pedal 5 positioned on the cab floor The movements of the levers described at point 3 3 6 1 pos 18 19 BACKHOE CONTROL LEVERS version wi...

Page 261: ...NECES SARY TO 1 Make sure that the position of the hammer with respect to the material to be broken is as perpendicular as possible and that the arm thrust is sufficient so that all the power of the hammer can be exploited 2 Keep the pressure of the excavator on the hammer con stant as the bit penetrates the material Always follow the hammer while it penetrates and operate the excavator arms in or...

Page 262: ...always correct the hitting position of the hammer by means of the bucket and arm control 5 Always make sure that the arm thrust is optimal in order to avoid harmful and useless strokes IMPORTANT q During work do not use the demolition hammer with the bucket cylinder at the end of stroke but always leave a minimum space of 5 cm RWA06450 RKA14440 R ...

Page 263: ... HAMMER 261 ALWAYS AVOID THE FOLLOWING INCORRECT USES 1 Gathering or moving stones with the demolition hammer 2 Rotating the upper structure while using the hammer 3 Moving the tool while it is hitting the material to be broken RWA06460 RWA06480 RKA15540 ...

Page 264: ...rizontal position or even with greater inclination 5 Levering with the tool after driving it into the material to be broken 6 Hitting the ground with the hammer bit 7 Lifting the machine by levering on the hammer bit with the bucket cylinder completely extended RKA15560 RKA15550 RWA06500 RKA14460 ...

Page 265: ...mmediately in or der to prevent the surface from getting slippery For the installation of the demolition hammer it is necessary to connect the mechanical constraints of the backhoe bucket as described in 3 13 4 1 CHANGING THE BACKHOE BUCKET and to carry out the hydraulic connections using the pipes pro vided After connecting the mechanical constraints carry out the hy draulic connections by procee...

Page 266: ...etting into them 5 Start the machine and raise the demolition hammer posi tioning it vertically 6 Stop the machine again and lubricate the joints see 4 5 1 LUBRICATION DIAGRAM and the hammer see the specific operation and maintenance manual 7 Before starting work check the tightness of the circuit WARNING q Wear thick gloves and safety goggles during this check q To check the system for leaks use ...

Page 267: ...relevant gaskets WARNING q Make sure that the plugs are properly tightened and that there are no leakages if the circuit is inadvert ently pressurized small leakages can be turned into thin jets that may perforate the skin or injure the eyes q Always wear thick gloves and safety goggles to carry out this check q To check the system for leaks use a piece of cardboard or a wooden board 5 Disconnect ...

Page 268: ...CONTROL The offset device is an integral part of the boom 3 and makes it possible to carry out digging operations beyond the machine outline If the offset device is in neutral position the boom can be used as a standard boom if it is necessary to dig beyond the ma chine outline the backhoe must be translated and the offset device must be operated to reproduce the parallelism between the arm 4 and ...

Page 269: ...n unchanged The movements of the arm are as follows 1 Swing to the left obtained by pressing the push button 7 when the button is released the arm stops 2 Swing to the right obtained by pressing the push button 8 when the button is released the arm stops IMPORTANT q The offset boom controls are inhibited when the safety button is in locking position see 3 3 2 pos 12 SER VO CONTROL LOCKING BUTTON 6...

Page 270: ...When the pedal 1 is pressed with the heel oil is deliv ered to the left side of the circuit and discharged from the right side of the same The movements of the levers described at point 3 3 6 1 pos 18 19 BACKHOE CONTROL LEVERS version with me chanical controls remain unchanged except for the bucket control which is used for positioning the optional equipment This configuration includes also the fi...

Page 271: ...e ignition key to position CAUTION q During the successive steps take care to prevent any impurities from getting into the circuit q If any oil has been spilled wipe it up immediately in or der to prevent the surface from getting slippery 2 Remove the plugs of the two pipes and of the installed equipment 3 Connect the delivery and return pipes 4 Start the machine and carry out several manoeuvres w...

Page 272: ...ile for its opening and folding it is possible to use the circuit used for the opening and folding of the standard bucket excluding the control cylinder see 6 9 2 INSTALLING THE CLAM SHELL BUCKET 6 9 1 1 CONTROL version with mechanically controlled backhoe The additional distributor that manages the swing of the clamshell bucket is controlled by means of a pedal 1 po sitioned on the left side of t...

Page 273: ...g and folding the standard bucket is used also for opening and closing the clamshell bucket ex cluding the control cylinder See 3 3 6 1 pos 18 19 BACKHOE CONTROL LEVERS version with servo controls and 6 9 2 INSTALLING THE CLAMSHELL BUCKET The swing movements are the following 1 Clockwise swing obtained by pressing the push button 2 2 Counterclockwise swing obtained by pressing the push button 3 IM...

Page 274: ... 1 Remove the standard bucket from the backhoe see 3 13 4 1 CHANGING THE BACKHOE BUCKET 2 Retract the bucket control piston completely 3 Connect the clamshell bucket to the arm 4 Stop the machine and move the controls in all directions to release the residual pressure IMPORTANT q If the machine is equipped with backhoe servo controls to eliminate the residual pressure proceed as follows 1 With the...

Page 275: ...plings for the opening and folding of the clamshell bucket 8 Remove the plugs from the rigid pipes of the system and connect the pipes 9 Start the machine and lift the clamshell bucket a few cen trimetres from the ground 10 Open fold and swing the bucket several times in order to check the tightness of the system WARNING q Wear thick gloves and safety goggles during this check q To check the syste...

Page 276: ... with delivery 1 and return 2 couplings for the use of a hand hydraulic hammer the connec tion to the machine is made up by two flexible pipes 3 The hammer circuit is separated from the normal circuits of the machine by means of a solenoid valve controlled by a push button positioned on the side dashboard The operation of the push button 4 which includes a connec tion warning light energizes the s...

Page 277: ...ion key to position and press the ham mer control push button 4 to release the residual pres sure from the hammer delivery pipe 3 Turn the ignition key to position IMPORTANT q If the machine is equipped with backhoe servo controls to eliminate the residual pressure proceed as follows 1 With the engine at rest turn the ignition key to posi tion 2 Press the servo control locking button and make sure...

Page 278: ...circuits follow the procedure indicated in the previous paragraph 6 10 2 1 CONNECTING THE HAND HAMMER 5 Disconnect the hammer CAUTION q If quick couplings are not provided place sealing plugs with the relevant gaskets on the couplings of the ma chine and of the hammer WARNING q Make sure that the plugs are properly tightened and that there are no leakages if the circuit is inadvertently pres suriz...

Page 279: ...loader make sure that they are disconnected When the operation of the system is not required any longer move the switch back to the neutral position LED off 6 11 1 LOAD STABILIZER SYSTEM LSS ACCUMULATOR CAUTION q If it is necessary to repair or change the accumulator of the load stabilizer system contact your Komatsu Dealer Failure to comply with this instruction may cause seri ous injury and even...

Page 280: ...for example spec buckets drills hydraulic hammers or other equipment provid that it is authorized by Komatsu If necessary the bucket can be attached to the quick coupling even in reversed position as shown in Fig A For the assembly or disassembly of the quick coupling device on from the backhoe arm keep to the indications given in pa graph 3 13 4 1 CHANGING THE BACKHOE BUCKET The quick coupling de...

Page 281: ...g holes in the bucket Lock the pins 2 and 3 with the relevant safety retainers 4 Clean the pins 2 3 and the bushings carefully before inserting them in the bucket and if necessary grease them slightly 3 Remove the safety pin 5 with the relevant retainer 6 from the quick coupling 1 4 Move the arm near the bucket and with a simple folding movement engage the front pin 2 with the quick coupling 1 5 S...

Page 282: ... Insert the safety pin 5 with the relevant retainer 6 in the quick coupling 1 6 Store the release lever 9 in the apposite space inside the cab WARNING q Be particularly careful when releasing the equipment from the quick coupling 1 Before definitively releasing the equipment from the quick coupling 1 make sure that the former is posi tioned in such a way as to constitute no danger for the operator...

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Komatsu Utility F50003, Operation & Maintenance Manual

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