Hitachi Zaxis 17U-5A Operator'S Manual Download

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MAINTENANCE

7-58

Replace Fuel Filter Element
--- every 500 hours

IMPORTANT:



Be sure to use only genuine Hitachi elements for the

fuel filter element. Failure to do so may deteriorate

the engine performance and/or shorten the engine

service life. Please be noted that all engine failures

caused by using other manufacturers' elements are

excluded from Hitachi Warranty Policy.



Take care not to allow dirt and/or water to enter the

fuel tank.

1. Park the machine following the same procedures as

described on page 7-7 for preparation for inspection and

maintenance.

2. Close fuel cock (6).
3. Place a 0.5 liter or larger capacity container under fuel

filter (1).

4. Loosen ring nut (3) of fuel filter (1). Remove filter cup (4).

5. Replace element (2) with a new one.

6. Clean filter cup (4). Install new element (2). Install filter

cup (4) with ring nut (3).

7. Open fuel cock (6).
8. Loosen air bleed plug (5). When fuel comes close to the

plug hole, close air bleed plug (5).

9. Bleed Air from the Fuel System

After replacing the fuel filter element, bleed air from the

fuel supply system.

( Refer to the "Bleed Air from the Fuel System".)

ZX17U-5A

ZX26U-5A

MABA-07-049

MABA-07-050

M503-07-038

Summary of Contents for Zaxis 17U-5A

Page 1: ...nd up ZX26U 5A 030001 and up PRINTED IN THE NETHERLANDS 2020 04 ZX17U 5A 26U 5A HYDRAULIC EXCAVATOR OPERATOR S MANUAL ENMABA 3 2 URL http www hitachi c m com 17U 5A 26U 5A Hydraulic Excavator ENMABA 3 2 PART NO Operator s Manual ...

Page 2: ...e Consult your nearest Hitachi dealer Warranty is provided as a part of Hitachi s support program for customers who operate and maintain their equipment as described in this manual The warranty is explained on the warranty certificate which you should have received from your dealer This warranty provides you the assurance that Hitachi will back its products where defects appear within the warranty...

Page 3: ...TATION BREAK IN OPERATINGTHE ENGINE DRIVINGTHE MACHINE OPERATINGTHE MACHINE TRANSPORTING MAINTENANCE MAINTENANCEUNDERSPECIALENVIRONMENTALCONDITIONS STORAGE TROUBLESHOOTING SPECIFICATIONS OPTIONAL ATTACHMENT INDEX VISIBILITY MAP INDEX ENMABA 3 2 GETTINGON OFFTHEMACHINE ...

Page 4: ......

Page 5: ...9 Prevent Burns S 30 Replace Rubber Hoses Periodically S 31 Avoid High Pressure Fluids S 31 Prevent Fires S 32 Evacuating in Case of Fire S 34 Beware of Exhaust Fumes S 34 Precautions for Welding and Grinding S 35 Avoid Heating Near Pressurized Fluid Lines S 36 Avoid Applying Heat to Lines Containing Flammable Fluids S 36 Precautions for Handling Accumulator ZX26U 5A S 36 Remove Paint Before Weldi...

Page 6: ...e Bucket 5 15 Use Correct Track Shoe 5 16 Using Rubber Crawler 5 17 Avoid other than Specified Machine Operations 5 19 Shackle Bracket Usage 5 20 Emergency Boom Lowering Procedure 5 21 Precautions for After Operations 5 24 TRANSPORTING 6 1 Transporting by Road 6 1 Loading Unloading on a Truck 6 2 Fastening Machine for Transporting 6 5 Unloading 6 6 Lifting Machine 6 7 MAINTENANCE 7 1 Correct Maint...

Page 7: ...ONDITIONS 9 1 Maintenance Under Special Environmental Conditions 9 1 STORAGE 10 1 Storing the Machine 10 1 TROUBLESHOOTING 11 1 Troubleshooting 11 1 SPECIFICATIONS 12 1 Std Specification 12 1 Working Ranges 12 2 Bucket Types and Applications ZX17U 5A 12 3 Std Specification 12 4 Working Ranges 12 5 Bucket Types and Applications ZX26U 5A 12 6 Noise Level Results 12 7 Vibration Level 12 7 Electric Fa...

Page 8: ...CONTENTS MEMO ...

Page 9: ...ly make them available upon request Machine 1 MODEL TYPE 2 Product Identification Number 3 Year of Manufacturing 4 Operating mass No additional counter weight version 5 Mass of additional counter weight 6 Engine power in KW according to ISO 14396 2002 Product Identification Number PRODUCT IDENTIFICATION NUMBER fNOTE SS3097499 HCMABA50X00030001 PRODUCT IDENTIFICATION NUMBER PIN Marks to indicate th...

Page 10: ...MACHINE NUMBERS 2 Engine TYPE MFG NO Travel Motor TYPE MFG NO ZX17U 5A ZX26U 5A ZX17U 5A ZX26U 5A MABA 00 003 MABA 00 004 MABA 00 005 MABA 00 006 ...

Page 11: ...MACHINE NUMBERS 3 Swing Motor TYPE MFG NO Hydraulic Pump TYPE MFG NO ZX26U 5A ZX26U 5A ZX17U 5A ZX17U 5A MABA 00 007 MABA 00 008 MABA 00 009 MABA 00 010 ...

Page 12: ...MACHINE NUMBERS 4 MEMO ...

Page 13: ... a potentially hazardous situation which if not avoided could result in death or serious injury CAUTION indicates a potentially hazardous situation which if not avoided may result in minor or moderate injury DANGER or WARNING safety signs are located near specific hazards General precautions are listed on CAUTION safety signs Some safety signs do not use any of the designated signal words above af...

Page 14: ...orization Failure to do so may deteriorate the part safety function and or service life In addition personal accident machine trouble and or damage to material caused by unauthorized modifications will void Hitachi Warranty Policy Do not use attachments and or optional parts or equipment not authorized by Hitachi Failure to do so may deteriorate the safety function and or service life of the machi...

Page 15: ...bers for doctors ambulance service hospital and fire department posted near your telephone Wear Protective Clothing Wear close fitting clothing and safety equipment appropriate to the job You may need A hard hat Safety shoes Safety glasses goggles or face shield Heavy gloves Hearing protection Reflective clothing Wet weather gear Respirator or filter mask Be sure to wear the correct equipment and ...

Page 16: ... or earplugs to protect against objectionable or uncomfortably loud noises Inspect Machine Inspect your machine carefully each day or shift by walking around it before you start it to avoid personal injury In the walk around inspection be sure to cover all points described in the Inspect Machine Daily Before Starting section in the operator s manual SA 434 SA 435 ...

Page 17: ...ls pilot control shut off lever or control levers which may result in serious injury or death Avoid storing transparent bottles in the cab Do not attach any transparent type window decorations on the windowpanes as they may focus sunlight possibly starting a fire Refrain from listening to the radio or using music headphones or mobile telephones in the cab while operating the machine Keep all flamm...

Page 18: ...ppery material such as oil grease or mud is present on steps handrails or platforms thoroughly remove such material Adjust the Operator s Seat A poorly adjusted seat for either the operator or for the work at hand may quickly fatigue the operator leading to misoperations The seat should be adjusted whenever changing the operator for the machine The operator should be able to fully depress the peda...

Page 19: ...er to the LOCK position Turn the key switch OFF to stop the engine Before leaving the machine close all windows doors and access covers and lock them up Fasten Your Seat Belt If the machine should overturn the operator may become injured and or thrown from the cab Additionally the operator may be crushed by the overturning machine resulting in serious injury or death Prior to operating the machine...

Page 20: ...ine If any faulty illumination is present immediately repair it Ensure the cab door windows doors and covers are securely locked Check the mirrors for problems If there is replace the problem part s or clean the mirror Operate Only from Operator s Seat Inappropriate engine starting procedures may cause the machine to runaway possibly resulting in serious injury or death Start the engine only when ...

Page 21: ... the engine starts Jump starting is a two person operation Never use a frozen battery Failure to follow correct jump starting procedures could result in a battery explosion or a runaway machine Keep Riders off Machine Riders on machine are subject to injury such as being struck by foreign objects and being thrown off the machine Only the operator should be on the machine Keep riders off Riders als...

Page 22: ...area of operation and machine movement Do not permit persons other than the operator to enter areas where there is danger such as flying objects Always beware of the surroundings while operating When working in a small area surrounded by obstacles take care not to hit the upperstructure against obstacles When loading onto trucks bring the bucket over the truck beds from the rear side Take care not...

Page 23: ...force ground edges and road shoulders as necessary Keep the machine well back from the edges of excavations and road shoulders When working on an incline or on a road shoulder employ a signal person as required Confirm that your machine is equipped with a FOPS cab before working in areas where the possibility of falling stones or debris exist When the footing is weak reinforce the ground before st...

Page 24: ...force the ground first using large pieces of steel plates strong and firm enough to easily support the machine Note that there is always a possibility of machine tipping over when working on rough terrain or on slopes Prevent machine tipping over from occurring When operating on rough terrain or on slopes Reduce the engine speed Select slow travel speed mode Operate the machine slowly and be cauti...

Page 25: ...point a signal person to coordinate the job site Make sure that all personnel obey the signal person s directions Confirm Direction of Machine to Be Driven Incorrect travel pedal lever operation may result in serious injury or death Before driving the machine confirm the position of the undercarriage in relation to the operator s position If the travel motors are located in front of the cab the ma...

Page 26: ...ope keep the bucket facing the direction of travel approximately 200 to 300 mm 8 to 12 in A above the ground If the machine starts to skid or becomes unstable immediately lower the bucket to the ground and stop Driving across the face of a slope or steering on a slope may cause the machine to skid or turnover If the direction must be changed move the machine to level ground then change the directi...

Page 27: ...ers An arrow mark seal is stuck on the inside surface of the side frame to indicate the machine front direction Select a travel route that is as flat as possible Steer the machine as straight as possible making small gradual changes in direction Before traveling on them check the strengths of bridges and road shoulders and reinforce if necessary Use wood plates in order not to damage the road surf...

Page 28: ...ket and or other work tools to the ground Run the engine at slow idle speed without load for 5 minutes to cool down the engine Stop the engine and remove the key from the key switch Pull the pilot control shut off lever to LOCK position Block both tracks and lower the bucket to the ground Thrust the bucket teeth into the ground if you must park on a grade Position the machine to prevent rolling Pa...

Page 29: ...N BYSTANDERS BEFORE MOVING MACHINE USE A SIGNAL PERSON WHEN BACKING UP IF YOUR VIEW IS OBSTRUCTED ALWAYS KEEP THE SIGNAL PERSON IN VIEW Use hand signals which conform to your local regulations when work conditions require a signal person No machine motions shall be made unless signals are clearly understood by both signalman and operator Learn the meanings of all flags signs and markings used on t...

Page 30: ...put a NO ADMISSION sign at the machine operating site and areas exposed by flying objects to prevent anyone from entering the work area Check that all personnel or obstacles other than the signal person are not present in the working area before operating the machine Never Position Bucket Over Anyone Never lift move or swing bucket above anyone or a truck cab Serious injury or machine damage may r...

Page 31: ...TER THAN YOU CAN JUMP FREE FASTEN YOUR SEAT BELT The danger of tipping is always present when operating on a grade possibly resulting in serious injury or death To avoid tipping Be extra careful before operating on a grade Prepare machine operating area flat Keep the bucket low to the ground and close to the machine Reduce operating speeds to avoid tipping or slipping Avoid changing direction when...

Page 32: ...gas lines and water lines If a fiber optic cable should be accidentally severed do not look into the end Doing so may result in serious eye injury Contact your local diggers hot line if available in your area and or the utility companies directly Have them mark all underground utilities Operate with Caution If the front attachment or any other part of the machine hits against an overhead obstacle ...

Page 33: ...htning may strike the machine If lightning comes close immediately stop the operation and take the following action When you are around the machine or operating cab less machine evacuate to a safe place far away from the machine When you are in the cab stay in the cab until lightning has passed and safety is secured Close the cab doors and windows Lower the bucket to the ground and stop the engine...

Page 34: ...ged chains or frayed cables sables slings or ropes Before craning position the upperstructure with the travel motors at the rear Move the load slowly and carefully Never move it suddenly Keep all persons well away from the load Never move a load over a person s head Do not allow anyone to approach the load until it is safely and securely situated on supporting blocks or on the ground Never attach ...

Page 35: ... glasses hard hat and face shield During machine operation debris from earth rock or metal may fly off from the track and bucket resulting in a serious personal injury or death Ensure nobody presents in or around the work area while machine is operating Falling of accumulated earth or dirt onto people may result in a serious personal injury or death Before performing maintenance or inspection unde...

Page 36: ... Safely Avoid Fires Handle fuel with care it is highly flammable If fuel ignites an explosion and or a fire may occur possibly resulting in serious injury or death Do not refuel the machine while smoking or when near open flame or sparks Always stop the engine before refueling the machine Fill the fuel tank outdoors All fuels most lubricants and some coolants are flammable Store flammable fluids w...

Page 37: ...ne control lever 1 is in the slow idle position and then reduce the engine speed Turn the travel mode switch 2 to slow speed for ZX26U 5A 4 Never load or unload the machine onto or off a truck or trailer using the front attachment functions when driving up or down the ramp 5 Never steer the machine while on the ramp If the traveling direction must be changed while on the ramp unload the machine fr...

Page 38: ...f lever to the LOCK position 9 Allow the engine to cool If a maintenance procedure must be performed with the engine running do not leave the machine unattended If the machine must be raised maintain a 90 to 110 angle between the boom and arm Securely support any machine elements that must be raised for service work Inspect certain parts periodically and repair or replace as necessary Refer to the...

Page 39: ...ith a guard In case the light bulb is broken spilled fuel oil antifreeze fluid or window washer fluid may catch fire Warn Others of Service Work Unexpected machine movement can cause serious injury Before performing any work on the machine attach a Do Not Operate tag on the control lever This tag is available from your authorized dealer SA 037 SS2045102 4 ...

Page 40: ... the machine or attachment Do not support the machine on cinder blocks hollow tires or props that may crumble under continuous load Do not work under a machine that is supported solely by a jack Stay Clear of Moving Parts Entanglement in moving parts can cause serious injury To prevent accidents care should be taken to ensure that hands feet clothing jewelry and hair do not become entangled when w...

Page 41: ...g in severe personal injury or death Travel reduction gears are under pressure As pieces may fly off be sure to keep body and face away from AIR RELEASE PLUG to avoid injury GEAR OIL is hot Wait for GEAR OIL to cool then gradually loosen AIR RELEASE PLUG to release pressure Avoid Injury from Attachment Falling Accident Stored attachments such as buckets hydraulic hammers and blades can fall and ca...

Page 42: ...ve the radiator cap until the engine is cool When opening turn the cap slowly to the stop Allow all pressure to be released before removing the cap The hydraulic oil tank is pressurized Again be sure to release all pressure before removing the cap Hot fluids and surfaces Engine oil gear oil and hydraulic oil also become hot during operation The engine hoses lines and other parts become hot as well...

Page 43: ...may result in severe burns gangrene or otherwise serious injury or death Avoid High Pressure Fluids Fluids such as diesel fuel or hydraulic oil under pressure can penetrate the skin or eyes causing serious injury blindness or death Avoid this hazard by relieving pressure before disconnecting hydraulic or other lines Tighten all connections before applying pressure Search for leaks with a piece of ...

Page 44: ...ssure lines Never install bent or damaged lines pipes or hoses Replace fuel hoses and hydraulic hoses periodically even if there is no abnormality in their external appearance Check for Shorts Short circuits can cause fires Clean and tighten all electrical connections Check before each shift or after eight 8 to ten 10 hours operation for loose kinked hardened or frayed electrical cables and wires ...

Page 45: ...rials such as dead leaves from entering However flammable materials which have passed through the wire screen may cause fires Check and clean the machine every day and immediately remove accumulated flammable materials Check Key Switch If a fire breaks out failure to stop the engine will escalate the fire hampering fire fighting Always check key switch function before operating the machine every d...

Page 46: ...t be opened break the front or rear window panes with the emergency evacuation hammer to escape from the cab Refer to the explanation pages on the Emergency Evacuation Method Beware of Exhaust Fumes Prevent asphyxiation Engine exhaust fumes can cause sickness or death If you must operate in a building be sure there is adequate ventilation Either use an exhaust pipe extension to remove the exhaust ...

Page 47: ...fe place before starting welding Only qualified personnel should perform welding Never allow an unqualified person to perform welding Grinding on the machine may create fire hazards Store flammable objects in a safe place before starting grinding After finishing welding and grinding recheck that there are no abnormalities such as the area surrounding the welded area still smoldering SA 818 ...

Page 48: ...eat to Lines Containing Flammable Fluids Do not weld or flame cut pipes or tubes that contain flammable fluids Clean them thoroughly with nonflammable solvent before welding or flame cutting them Precautions for Handling Accumulator ZX26U 5A High pressure nitrogen gas is sealed in the accumulator and the gas damper Inappropriate handling may cause explosion possibly resulting in serious injury or ...

Page 49: ...bestos and Silicon Dust and Other Contamination Take care not to inhale dust produced in the work site Inhalation of asbestos fibers may be the cause of lung cancer Inhalation of silicon dust or other contamination may cause sickness Depending on the work site conditions the risk of inhaling asbestos fiber silicon dust or other contamination may exist Spray water to prevent asbestos fibers silicon...

Page 50: ...ntinue to use or charge the battery when electrolyte level is lower than specified Explosion of the battery may result Loose terminals may produce sparks Securely tighten all terminals Connect terminals to the correct electrical poles Failure to do so may cause damage to the electrical parts or fire Battery electrolyte is poisonous If the battery should explode battery electrolyte may be splashed ...

Page 51: ...emical products used with your machine Dispose of Waste Properly Improperly disposing of waste can threaten the environment and ecology Potentially harmful waste used with Hitachi equipment includes such items as oil fuel coolant brake fluid filters and batteries Use leakproof containers when draining fluids Do not use food or beverage containers that may mislead someone into drinking from them Do...

Page 52: ...ely dangerous practice Precautions for Communication Terminal Electrical wave transmitted from the communication terminal may cause malfunction of other electronic devices Inquire the device manufacturer for electrical wave disturbance upon using an electronic device near the communication terminal ...

Page 53: ...sual aids supplied with the machine This map shows an approximation of the residual masking This can be used as a guide when conducting a site risk assessment utilized for site management and to consider additional visual aids Conditions Driver s visibility on 1mRB and VTC are evaluated under ISO 5006 Test Height on 1mRB 1mRB to VTC on VTC 1 0 m to 1 2 m Ground Level Operator eye Height 1 2 m from...

Page 54: ...dard visual aids supplied with the machine This map shows an approximation of the residual masking This can be used as a guide when conducting a site risk assessment utilized for site management and to consider additional visual aids Conditions Driver s visibility on 1mRB and VTC are evaluated under ISO 5006 Test Height on 1mRB 1mRB to VTC on VTC 1 0 m to 1 2 m Ground Level Operator eye Height 1 2...

Page 55: ...e safety signs clean In case a safety sign is broken or lost immediately obtain a new replacement and affix it again in position on the machine Use the part No indicated under the right corner of each safety sign illustration when ordering it at your authorized dealer Always read the Operator s Manual before operating servicing disassembling assembling and transporting the machine SAFETY SIGNS MAB...

Page 56: ...sure to lower the front attachment to the ground lock the control levers and remove the engine key before leaving the machine unattended Before starting engine pilot control shut off lever must be in up position MABA 00 022 ZX17U 5A MABA 00 023 ZX26U 5A ZX17U 5A MABC 00 003 MABA 00 023 ZX26U 5A SS4295807 SS4420333 2 ...

Page 57: ...5 Electrocution is possible if the machine is operated too close to power lines Always keep a safe distance from power lines Canopy ZX17U 5A Canopy ZX26U 5A Cab ZX26U 5A MABA 00 030 MABA 00 031 MABA 00 032 SS4420334 2 ...

Page 58: ...SAFETY SIGNS S 46 Stand clear of the equipment If knocked over by the equipment serious injury may result SS 1494 SS3085503 1 ...

Page 59: ...raulic oil cap is removed while the machine temperature is still high possibly causing a burn Wait until the machine has cooled to remove the cap ZX17U 5A ZX26U 5A MABA 00 024 ZX17U 5A MABA 00 025 ZX17U 5A MABA 00 026 ZX26U 5A MABA 00 027 ZX26U 5A SS4392290 1 SS4420336 2 ...

Page 60: ...pection and maintenance Sign indicates the hazard of rotating parts such as belt etc that could cause injury by being caught Turn it off completely before inspection and maintenance ZX17U 5A ZX26U 5A ZX17U 5A MABA 00 013 ZX26U 5A MABA 00 028 ZX17U 5A ZX26U 5A ZX17U 5A ZX26U 5A MABA 00 013 MABA 00 028 SS4425442 1 SS4672424 2 SSYD00008926 0 SS4425120 1 ...

Page 61: ... lock the window in the stored position on the cab equipped machine Serious injury may result if the plug flies off the track adjuster Read the Operator s Manual before loosening the track and adjust the track sag following the correct procedure SS 1495 ZX26U 5A MABA 00 033 SS4425121 1 SS4392288 2 ...

Page 62: ...SAFETY SIGNS S 50 Possible severe burns Do not touch the engine components while they are hot ZX17U 5A ZX26U 5A MABA 00 029 MABA 00 014 SS4425443 1 ...

Page 63: ...he machine swings Stand clear of the swing radius Sign indicates the hazard of rotating parts such as fan etc that could cause injury by being caught Turn it off completely before inspection and maintenance ZX26U 5A MABA 00 029 ZX17U 5A ZX26U 5A MABC 00 006 MABC 00 007 SS3078858 2 SS4408870 2 ...

Page 64: ... the machine should overturn the operator may become injured and or thrown from the cab and or crushed by the overturning machine CAB ZX26U 5A CANOPY ZX26U 5A CANOPY ZX17U 5A MABC 00 020 MABC 00 021 MABC 00 022 SS4448289 1 ...

Page 65: ... side frames retracted only when traveling on a flat narrow work site Except for the above operating conditions always operate the machine with the side frames extended for travel excavation and blade operations Failure to do so may cause the machine to turn over SS4676482 0 MABA 00 046 ZX17U 5A ...

Page 66: ...ROPS TOPS or TOP Guard other than authorized personnel If an operator s station is detached or a bolt is installed removed by unauthorized personnel it may not comply with ROPS TOPS or TOP Guard Consult your nearest authorized dealer when any modification is required CANOPY ZX17U 5A CANOPY ZX26U 5A CAB ZX26U 5A SS 3644 SS 3645 SS 3646 MABA 00 021 MABC 00 024 MABA 00 034 ...

Page 67: ...4 Boom Cylinder 5 Arm 6 Arm Cylinder 7 Bucket 8 Bucket Cylinder 9 Work Light 10 Boom Swing Cylinder 11 Blade 12 Blade Cylinder 13 Front Idler 14 Track Frame 15 Track Shoe 16 Travel Device Components Name MABA 01 001 6 3 2 1 16 15 14 13 12 11 10 4 9 7 8 5 ...

Page 68: ...e not to contact door striker 2 dWARNING Never attach a wire on handrails 4 and door striker 2 to lift the cab or main body or while transporting the machine on a truck or trailer as it is dangerous Door knob 6 handle 5 on the front window and release lever 7 are not handrails Do not use them as a handrail when getting on and off the machine Do not hold control lever 3 or pilot control shut off le...

Page 69: ...Seat Back Box Optional 10 Seat Belt 11 Operator s Seat 12 Travel Mode Pedal 13 Auxiliary Pedal 14 Auxiliary Power Optional 15 Side Frame Extend Retract Lever 16 Pilot Control Shut Off Lever 17 Fuse Box 18 Selector Valve 19 Blade Lever 20 Engine Control Lever 21 Numeric Keypad Lock System Optional 11 1 12 13 4 6 7 MABA 01 003 2 3 5 8 9 10 6 MABA 01 004 15 16 14 18 17 MABA 01 005 19 21 20 ...

Page 70: ...Seat 12 FM AM Radio Cab equipped machine Optional 13 Door Opener Cab equipped machine 14 Auxiliary Pedal 15 Auxiliary Power Optional 16 Pilot Control Shut Off Lever 17 Fuse Box 18 Selector Valve 19 Blade Lever 20 Numeric Keypad Lock System Optional 21 Travel Mode Switch 22 Heater Control Switch Cab equipped machine 23 Engine Control Lever 11 1 14 6 7 2 3 4 8 9 10 6 16 15 17 19 23 20 5 18 MABA 01 0...

Page 71: ... Travel Mode Switch ZX26U 5A 7 Heater Control Switch ZX26U 5A Cab equipped machine 8 Wiper Switch ZX26U 5A Cab equipped machine Three operational positions are provided on this switch OFF Neither the wiper nor the washer operates Center The wiper operates WASHER The washer operates together with the wiper M1M7 01 007 4 1 2 3 MABA 01 005 5 MABA 01 006 9 MABA 01 010 7 8 6 5 Cab ZX26U 5A Canopy ...

Page 72: ...ator When the remaining fuel level indicator comes ON at flat ground the remaining fuel level is as follows Refill fuel as soon as possible Model Fuel Level ZX17U 5A Approximately 5 Liters ZX26U 5A Approximately 6 Liters Preheat Indicator It is lit when the key switch is turned to the HEAT position After turning the key switch to the HEAT position the preheat indicator turns OFF when preheating is...

Page 73: ...ound at the same time Immediately stop the engine Check the engine oil pressure system and the oil level for any abnormality Hour Meter Total accumulated machine operation hours counted since the machine started working are displayed in the unit of HOUR h One digit after the decimal point indicates the tenths of an hour 6 minutes Fuel Gauge The gauge segment position indicates the fuel level Refil...

Page 74: ...at the right rear in the operator s station Blower Operation Turn heater cock 1 in the engine compartment clockwise to close it Adjust air flow following the same method as mentioned in the Heater Operation Defroster Operation Adjust air flow by operating heater adjust knob 2 Remove clouding on the window pane by directing air flow from air vents 3 and 4 toward the window pane 1 2 3 4 MABA 01 011 ...

Page 75: ...OPERATOR S STATION 1 9 Radio ZX26U 5A Cab equipped machine Optional 1 Radio Clock 1 MABA 01 013 ...

Page 76: ... Switch DISP Push this switch to switch over the display between radio wave frequency and time 7 Preset Switch PRESET One FM and MW AM station per button can be preset using these respective buttons 8 Volume Control Button VOL Push this switch to adjust the volume Push the button to increase the volume in a step by step manner Push the button to decrease the volume in a step by step manner Radio O...

Page 77: ...s the PRESET button No flashes 3 times and frequency display becomes ON 3 Repeat steps 1 and 2 for other PRESET buttons 7 Station Auto Presetting Procedure Pushing SOUND control switch 2 long with the radio switch ON will search for the optimum receiving radio frequency stations and automatically allocate each station in preset memory buttons 1 to 6 fNOTE Performing auto presetting operation will ...

Page 78: ... the TRE state treble level is increased by one step When DOWN button 3 is pressed with the TRE state treble level is decreased by one step Sound Adjustment Bass Control When UP button 3 is pressed with the Bas state bass level is increased by one step When DOWN button 3 is pressed with the Bas state bass level is decreased by one step Digital Clock Setting Procedure Pushing DISP button 6 long in ...

Page 79: ...ver ZX26U 5A Cab equipped machine dCAUTION Open the door all the way until it securely locks in the latch on the side of the cab To unlock the door push down door lock release lever 1 located at the left side of the operator s seat 1 MABA 01 014 ...

Page 80: ...t window to prevent the wiper from operating when the front window is opened Before closing the front window ensure that the wiper switch is turned OFF When opening the front window ensure that the left and right locks are definitely activated 4 Close the upper front window by following steps 1 and 2 in the reverse order Removing and Storing Lower Front Window 1 Open the upper front window beforeh...

Page 81: ...r 1 horizontally Move the seat backward and forward Seat fore aft is adjustable Adjustable range is as follows Model Adjustable Range ZX17U 5A 14 Steps 140 mm in total ZX26U 5A 11 Steps 110 mm in total Seat Back Box Pocket 2 is located at the back side of the seat Put the operator s manual inside 1 2 MABA 01 007 MABA 01 008 ...

Page 82: ... 2 If the cab door is difficult to open or use open the upper front window Escape through the window See page OPENING UPPER FRONT WINDOW for the opening method of the upper front window dCAUTION Take care not to be injured by pieces of broken window glass 3 If the front window can not be opened break the window glass by using the emergency evacuation tool 1 located at the cab rear Then escape thro...

Page 83: ...nce Seat Belt 1 Confirm that seat belt 1 is not twisted Securely insert the end of seat belt 1 into buckle 2 Lightly pull on the belt to confirm that the buckle locks securely 2 Push button 3 on buckle 2 to unfasten seat belt 1 Replace the seat belt if it is damaged or worn out or if the seat belt has external damage due to accident Room Lamp ZX26U 5A Cab equipped machine Push switch 4 on the cab ...

Page 84: ...OPERATOR S STATION 1 18 MEMO ...

Page 85: ...tly affecting the service life of the machine Thoroughly perform the break in operation The service life and the performance of the machine can be greatly affected by operation and maintenance of the machine during the initial stage of operation Perform the break in operation with the engine output less than 80 of the maximum output for the first 50 hours ...

Page 86: ...BREAK IN 2 2 MEMO ...

Page 87: ...normal noise of upper structure Looseness and missing of mounting bolts and nuts Washer Fluid Undercarriage Sag wear and break of crawler Oil leaks and wear on upper lower rollers and front idlers Oil leaks from travel devices Looseness and missing of mounting bolts and nuts Working Device Check cylinders pipe lines and hoses for oil leaks and damages Wear and damage of the bucket Check bucket tee...

Page 88: ...lb or a warning lamp burned out the alarm will not be displayed even if any abnormality occurs on the machine Accordingly in case any of the indicator bulbs or the warning lamps do not come ON immediately contact your authorized dealer for repair If any of alternator 3 or engine oil pressure 4 indicator fails to light after indicator light check is completed the machine may have trouble Immediatel...

Page 89: ...nds at a time If engine fails to start return key switch to OFF Wait for more than 30 seconds then try again Failure to do so may cause damage to the starter and or discharging the batteries 5 Release key switch 2 immediately after the engine has started Key switch 2 will automatically return to ON position fNOTE The horn sounds even though key switch 2 is turned OFF The engine does not start unle...

Page 90: ...onds at a time If engine fails to start return key switch to OFF Wait for more than 30 seconds then try again Failure to do so may cause damage to the starter and or discharging the batteries 6 Release key switch 2 immediately after the engine has started Key switch 2 will automatically return to ON position fNOTE The horn sounds even though key switch 2 is turned OFF The engine does not start unl...

Page 91: ...ine oil pressure indicator 2 stays ON immediately stop the engine Inspect the engine oil pressure system and the oil level IMPORTANT In case any abnormality is found on the monitor unit immediately stop the engine Inspect the cause of the trouble Check engine noise and exhaust gas color Check that the engine noise and exhaust gas color are normal fNOTE Check the exhaust gas color as follows After ...

Page 92: ...tery is exhausted start the engine using booster battery as shown below Connecting the booster batteries 1 Stop the engine of the machine on which booster battery is mounted 2 Connect one end of red cable 1 to the positive terminal of the machine battery and the other end to the positive terminal of the booster battery 3 Connect one end of black cable 2 to the negative terminal of the booster batt...

Page 93: ...first 2 Disconnect the other end of black booster negative cable 2 from the booster battery 3 Disconnect red booster positive cable 1 from the booster battery 4 Disconnect red booster positive cable 1 from the machine battery To hinge 3 of the machine tank cover Red Booster Battery Machine Battery Black 1 2 M503 03 002 Disconnect First ...

Page 94: ...ept for special cases before stopping the engine lower the bucket and the blade to the ground 2 Pull pilot control shut off lever 1 to LOCK position 3 Turn the engine control lever to the slow idle position and run the engine for 5 minutes to cool the engine 4 Turn key switch 2 OFF to stop the engine ...

Page 95: ...e When combined operation is needed set the travel lever in an intermediate position fNOTE Travel lever dampers are provided for smooth control In extremely cold weather lower than 20 C the travel lever will become heavy to operate This is caused by increase in oil viscosity which is not abnormal Forward Reverse Travel Move both levers forward together to travel forward Pull the levers back togeth...

Page 96: ...osite directions each other Move one lever forward and pull the other back at the same time dCAUTION During pivot or spin turn machine operations the base machine may shake When turning the machine in a tight area slowly operate the machine while taking care not to allow the machine to come into contact with the surrounding objects Spin Turn Pivot Turn M1MF 04 001 M104 04 007 M1MF 04 001 M104 04 0...

Page 97: ...s caused by increase in oil viscosity which is not abnormal Forward Reverse Travel Move both levers or pedals forward together to travel forward Pull the levers or pedals back together to travel in reverse The travel speed can be controlled by adjusting the lever or pedal operating stroke Ascending Descending Slopes The machine gradeability is 25 47 Slowly operate the travel levers or pedals when ...

Page 98: ...site directions Push one lever or pedal forward and pull the other back at the same time dWARNING During pivot or spin turn machine operations the base machine may shake When turning the machine in a tight area slowly operate the machine while taking care not to allow the machine to come in contact with the surrounding objects Spin Turn Pivot Turn M104 04 005 M104 04 007 M1M7 04 012 M1M7 04 013 ...

Page 99: ...avel mode from the slow to fast while descending a slope Return the travel levers to neutral once before shifting the travel mode Depress the travel mode pedal 1 to select the fast travel mode while depressing When release the travel mode pedal 1 return to the slow travel mode MABA 04 001 1 ...

Page 100: ...switch 1 is pushed while the machine is traveling at high speed the travel speed becomes slow Travel mode switch 1 turns OFF fNOTE At low temperature when the machine is traveling with travel mode switch 1 in the fast travel mode position the slow travel mode may not automatically be selected even if the traveling loads increase This symptom is not abnormal Drive the machine after conducting suffi...

Page 101: ...r not to damage the road surface Be careful of steering when operating on asphalt roads in summer When crossing train tracks use wooden plates in order not to damage them Do not make contact with electric wires or bridges When crossing a river measure the depth of the river using the bucket and cross slowly Do not cross the river when the depth of the river is deeper than the upper edge of the upp...

Page 102: ...m to evacuate the machine Operate the boom the arm and the travel levers simultaneously at this time to prevent the machine from being loaded abnormally If the track frame bottom comes in contact with the ground or if mud and or grabbles are tightly packed into the undercarriage the machine may become impossible to travel Raise each track above the ground with the boom and arm extended remove mud ...

Page 103: ...e bucket s round side on the ground 1 Swing the upperstructure 90 2 Position the boom and the arm so that the angle between them becomes 90 to 110 Push the ground with the round part of the bucket bottom to raise the track off the ground 3 Do not raise the track with the boom and the arm when the boom is swung 4 Place blocks under the machine frame to support the machine 90 to 110 º M1M7 04 006 ...

Page 104: ...opes and the edge corners if the frame IMPORTANT A bracket is provided on the track frame to install a shackle for towing a lightweight object on some machines Never attempt to tow the machine using this lightweight object towing bracket Breaking the towing bracket may result Refer to the descriptions on Shackle Bracket Usage on page 5 15 in Operating the Machine section for usages of the shackle ...

Page 105: ... swing bearing swing gears and center joint IMPORTANT If the swing bearing swing gears and center joint are submerged in water or mud by mistake premature wearing on parts such as the swing bearing may result Grease must be changed or overhauling will be required immediately Stop operating the machine as soon as possible and contact your authorized dealer Swing Internal Gear Grease Capacity Model ...

Page 106: ... to skid or becomes unstable lower the bucket immediately Driving across the face of a slope or steering on a slope may cause the machine to skid or turnover If the direction must be changed move the machine to level ground then change the direction to ensure safe operation Avoid swinging the upperstructure on slopes Never attempt to swing the upperstructure downhill The machine may tip over If sw...

Page 107: ...ket and the blade to the ground IMPORTANT Turbocharger may be damaged if the engine is not properly shut down 3 Turn the engine control lever counterclockwise to the slow idle position Run the engine at slow idle speed for approximately 5 minutes to cool the engine 4 Turn the key switch to OFF Remove key 2 from the key switch 5 Pull pilot control shut off lever 1 to the LOCK position IMPORTANT Pro...

Page 108: ...DRIVING THE MACHINE 4 14 MEMO ...

Page 109: ...ng Do not change the control lever operation pattern Failure to do so may result in operation mistake of the machine A label showing the control patterns of the levers and pedals is attached on the right side in the cab When a lever is released it will automatically return to neutral and that machine function will stop 1 Arm Roll Out 2 Arm Roll In 3 Swing Left 4 Swing Right 5 Boom Lower 6 Boom Rai...

Page 110: ... at the operator s right foot as illustrated to the right Boom Swing Operation 1 Turn cover 2 for boom swing pedal 1 forward 2 Step on the left side of boom swing pedal 1 to swing left Step on the right side of pedal 1 to swing right 3 Turn cover 2 backward over boom swing pedal 1 when boom swing operation is no longer required 3 Swing Left 4 Swing Right 3 4 2 1 Unlock Position 2 Lock Position MAB...

Page 111: ... on the operator s right to raise and lower the blade When blade lever 1 is released it automatically returns to neutral holding the blade in the present position until lever 1 is operated again 2 Blade Raise 3 Blade Lower 1 2 3 3 2 MABA 05 001 MABA 04 002 ...

Page 112: ...ure to do so may result in damage to the blade and the undercarriage When jacking up the machine with this blade the surface beneath the blade comes under high pressure increasing the risk of surface collapse Always be sure that the surface is strong enough to support the weight of the machine before jacking up the machine Avoid dangerous uneven distribution of weight to the blade by maintaining e...

Page 113: ...frames fully retracted only when traveling through a flat narrow work site Except for this condition whenever traveling the machine performing excavation or operating the blade be sure to fully extend the side frames Failure to do so may cause the machine to turn over IMPORTANT Before extending or retracting the side frames park the machine on a level surface with no obstructions and remove packed...

Page 114: ...ade and stopping the engine When extending the blade width 1 Remove blade pin 5 2 Turn over the extension blade 4 and align the pin hole 3 Install blade pin 5 4 Extend the left side following steps 1 to 3 above When retracting the blade width 1 Remove blade pin 5 2 Turn over the extension blade 4 so that the cutting edge side may turn to the track shoe side Align the pin hole 3 Install blade pin 5...

Page 115: ...ll control lever function without holding pilot control shut off lever 1 Be sure not to touch control lever 3 when operating pilot control shut off lever 1 Failure to do so may allow the machine to unexpectedly move when a body part unintentionally comes in contact with the control lever possibly resulting in serious personal injury or death When leaving the machine always stop the engine Then pul...

Page 116: ... all control levers and pedals are in neutral and that no part of the machine is in motion dWARNING If any part of the machine any actuator moves when pilot control shut off lever 1 is lowered to the UNLOCK position despite the fact that all controls are placed in neutral the machine is malfunctioning Immediately pull pilot control shut off lever 1 back to the LOCK position and stop the engine The...

Page 117: ... in Cold Weather IMPORTANT In case the hydraulic oil temperature is low never operate the machine until all actuator speeds become normal after warming up operation fNOTE During cold weather season the warm up operation system automatically operates so that the engine speed increases for a moment even though the engine control lever is in the slow idle position 1 Run the engine at intermediate spe...

Page 118: ...ired depth move the machine as required to continue the trench When operating the arm avoid bottoming the cylinder to prevent cylinder damage IMPORTANT When digging at an angle avoid striking the tracks with the bucket teeth When lowering the boom avoid sudden stops that may cause shock load damage to the machine When digging a deep excavation avoid striking the boom or bucket cylinder hoses again...

Page 119: ... part and the machine may be damaged When grading by operating the boom arm and bucket simultaneously 1 When grading from the forward to the backward slowly roll in the arm while slightly raising the boom As soon as the arm passes the vertical position slowly lower the boom so that the bucket can be horizontally moved 2 When grading from the backward to the forward operate the arm and bucket rolle...

Page 120: ...machine s weight as additional digging force Severe machine damage may result Avoid Excavation Using Upperstructure and or Boom Swing Power Never attempt to move rocks or excavate a cliff face by hitting the bucket using upperstructure and or boom swing power Damage to the front attachment or shortening of the service life of the swing systems may result MZX5 05 002 ...

Page 121: ...cket digging out force Operate the boom arm and bucket simultaneously so that the bucket teeth can be effectively penetrated into the excavation surface Carefully operate the machine to prevent crushed material from spattering possibly resulting in injury to the operator and or co workers around the machine Avoid Striking With Bucket dWARNING The bucket bottom is curved Therefore hammering or pili...

Page 122: ...4 Boom Cylinder may Hit Blade When digging deeply with the blade positioned at the front the boom cylinder or bucket may accidentally hit the blade causing damage Take care to prevent this from happening MZX5 13 014 MZX5 13 015 ...

Page 123: ...oom Cylinder With Track When digging deeply with the front attachment positioned at an angle as illustrated the boom cylinder may accidentally collide with the track causing damage Take extra care to prevent this from happening Precautions for Installing Wide Bucket or Special Type Bucket If the boom is fully offset to the left and raised on the cab equipped machine with a bucket wider than shown ...

Page 124: ...arts such as track links or rollers Refer to the table for Shoe Types and Applications in the specification chapter Soil may easily become packed into the crawler during travel operation on sandy ground If the machine is driven without removing the packed soil from the crawlers the rubber crawlers will be overloaded possibly resulting in breakage of the crawlers Avoid causing the crawlers to becom...

Page 125: ...er of sliding 3 Do not travel the machine while raising one side crawler off the ground with the front attachment Shear or damage to the rubber crawler may result Precautions for Using Rubber Crawlers dWARNING The rubber crawler machine is less stable than the steel crawler machine as the edge of the rubber crawler is easier to deform than steel crawler Pay attention when operating the machine at ...

Page 126: ...rawler has a thin rubber film shown in dotted line on its roller tread During operation of a new machine or immediately after the rubber crawlers are replaced the rubber film may come off due to contact with the rollers This is not abnormal See the right illustration 6 If the rubber crawler is damaged and the rubber crawler core wire rusts the service lifetime of the rubber crawler will become sho...

Page 127: ...e machine to become unstable possibly resulting in tipping accident When lifting a load carefully swing the machine not to cause the lifted load to come in contact with personnel working near the machine Reduce the engine speed to slowly swing the machine Failure to do so may cause the machine to tip over by swing centrifugal force If traveling the machine with a lifted load is unavoidable reduce ...

Page 128: ... towing a light weight object using the shackle bracket provided on the track frame The track frame and or the shackle bracket may be damaged otherwise The maximum drawbar pull Model Maximum Drawbar Pull ZX17U 5A 4900 N 500 kgf ZX26U 5A 7800 N 800 kgf Be sure to use a shackle Keep the tow line horizontal straight and parallel to the tracks Select the slow travel mode Slowly drive the machine when ...

Page 129: ...er the boom to lower the bucket to the ground referring to the emergency boom lowering procedure stated below 1 Remove the cover above the hydraulic oil tank Loosen filler cap 1 on the hydraulic oil tank to release air pressure from the hydraulic oil tank fNOTE Upper cover 5 can not be removed unless cover 4 at the right side of hydraulic oil tank is removed for ZX17U 5A 2 Remove bolts 2 from the ...

Page 130: ...e boom spool slowly 1 Remove allen head bolts and boom spool to lower the boom Place a container to receive oil escaping from the control valve when removing the boom spool 2 Ensure the boom is completely lowered and then install the boom spool with allen head bolts Tightening Torque 6 to 7 N m 0 6 to 0 7 kgf m 4 4 to 5 2 lbf ft Boom Spool Allen Head Bolt MABA 05 012 MABA 05 013 Spool Body ...

Page 131: ...ue 60 to 70 N m 6 to 7 kgf m 44 to 52 lbf ft If the front attachment is loaded 1 Put the matching marks on lock nut in overload relief valve and adjusting screw in the boom raise circuit cylinder bottom side dWARNING Loosen the adjusting screw slowly If it is loosened rapidly the boom may also lower rapidly 2 Loosen the lock nut Loosen adjusting screw slowly by checking the movement of boom 3 Afte...

Page 132: ... day s operation drive the machine to a firm level ground where no possibility of falling stones ground collapse or floods are present Refer to the group for PARKING THE MACHINE in the DRIVING THE MACHINE section Fully refill the fuel in the fuel tank Clean the machine M1M7 05 024 ...

Page 133: ...rting weight and dimensions may vary depending on the type of shoe or front attachments installed Investigate beforehand the conditions of the route to be traveled such as dimensional limits weight limits and traffic regulations In some cases getting the permission from the local authority concerned or disassembling the machine to bring it within dimensional limits or weight limits of local regula...

Page 134: ...nt attachment when traveling on a slope Ramp Loading Dock 1 Before loading thoroughly clean the ramps loading dock and flatbed Dirty ramps loading docks and flatbeds with oil mud or ice on them are slippery and dangerous 2 Place blocks against the truck wheels while using a ramp or loading dock 3 Ramps must be sufficient in width length and strength Be sure that the incline of the ramp is less tha...

Page 135: ...ttempt to change directions whilst positioned on the ramp If repositioning is necessary first move back to the ground or flatbed modify traveling direction and begin to drive again The top end of the ramp where it meets the flatbed is a sudden bump Take care when traveling over it as the balance may be lost Extreme care must be taken when swinging the upper structure when the machine is on the tru...

Page 136: ...ne as illustrated right And then slowly rotate the upperstructure 180 while keeping the arm fully rolled in 6 Reverse the machine to the specified position 7 Rest the front attachment on supports such as wooden blocks placed on the truck flatbed Also lower the blade onto the deck at this time if fitted 8 Stop the engine Remove the key from the key switch 9 Place the pilot control shut off lever in...

Page 137: ...orner of the machine and front attachment to the truck with appropriate strength of chains or cables Transporting the machine equipped with rubber crawlers When securing the machine to the flatbed do not directly tighten the rubber crawler with wire ropes As illustrated below place soft protectors against left right side frame respectively to securely tighten the machine to the flatbed before tran...

Page 138: ...ake care when traveling over it as the balance may be lost IMPORTANT Make sure that the angle of the boom and the arm is kept at between 90 to 110 when unloading the unit Damage to the unit is possible if the arm is kept in a suspended state during unloading 1 Travel extremely slowly with the bucket on the ground and the angle of the arm and the boom kept at between 90 to 110 when moving from the ...

Page 139: ...ing lifted resulting in machine damage and or personal injury Do not lift the machine quickly Excessive load will be applied to the lifting wire ropes and or lifting tools possibly causing them to break Do not allow anyone to come close to or under the lifted machine The indicated gravity center is for the standard specification machine The gravity center will vary depending on the kinds of attach...

Page 140: ...ol shut off lever to the LOCK position 6 Stop the engine Remove the key from the key switch 7 Set a crane in an appropriate position 8 Attach shackles to the boom and blade hooks Securely thread wire ropes through the shackles 9 Slowly lift the machine so that shock loads will not be applied to the machine Take sufficient care not to lose the balance of the machine ZX17U 5A 3100 mm 122 in ZX26U 5A...

Page 141: ... use only genuine Hitachi parts Failure to do so may result in serious injury or death and or machine breakdown Failure to use recommended fuel lubricants and genuine Hitachi parts will result in loss of Hitachi product warranty Never adjust engine governor or hydraulic system relief valve Protect electrical parts from water and steam Never disassemble electrical components such as main controller...

Page 142: ...lubricants check and adjustment intervals The maintenance guide table is affixed under the seat Refer to 7 5 7 6 Check and maintenance intervals shown in this manual are those for the machines to be operated under normal conditions In case the machine is operated under more severe conditions shorten the intervals ...

Page 143: ...ers 10 Air Cleaner 11 Pump 12 Counterweight 13 Track 14 Travel Device 15 Lower Roller 16 Center Joint 17 Swing Bearing 18 Control Valve 19 Track Adjuster 20 Front Idler 21 Blade Cylinder 22 Boom Cylinder 23 Blade 24 Bucket 25 Link 26 Tooth 27 Bucket Cylinder 28 Arm 1 2 3 4 5 6 7 10 11 12 14 15 16 17 18 19 21 22 23 24 25 26 27 20 MABA 07 001 13 28 8 9 ...

Page 144: ...all necessary maintenance can be performed regularly Symbol Marks The following marks are used in the maintenance guide table Grease Front Joint Pin Swing Bearing Swing Gear Hydraulic oil filters Pilot Filter Hydraulic Oil Tank Filter Suction Filter Gear Oil Travel Reduction Device Air Cleaner Element Engine Oil Coolant Long Life Coolant Engine Oil Filter Fuel Filter Hydraulic Oil ...

Page 145: ...ng 7 25 11 Engine Oil Filter 7 28 4 Grease Every 100 hours during first time operation up to 500 hours 7 22 12 Fuel Filter 7 58 5 Grease Swing Internal Gear 7 26 13 Air Cleaner Element 7 60 6 Hydraulic Oil 7 40 14 Grease Control Lever 7 26 7 Gear Oil Travel Reduction Gear 7 32 15 Grease Bucket 7 22 8 Hydraulic Oil Filter Suction 7 40 4 5 15 3 4 9 8 6 2 1 11 12 14 13 10 1 7 Lubrication Interval hou...

Page 146: ...ngine Oil Filter 7 28 4 Grease Every 100 hours during first time operation up to 500 hours 7 22 12 Fuel Filter 7 58 5 Grease Swing Internal Gear 7 26 13 Air Cleaner Element 7 60 6 Hydraulic Oil 7 40 14 Grease Control Lever 7 26 7 Gear Oil Travel Reduction Gear 7 32 15 Grease Bucket 7 22 8 Hydraulic Oil Filter Suction 7 40 16 Grease Blade 7 24 4 9 8 6 2 1 11 12 14 13 10 1 7 Lubrication Interval hou...

Page 147: ...gine is running in order to prevent the accident If maintenance work while engine running is unavoidable strictly comply with the following items One person should take the operator s seat to be ready to stop the engine any time while communicating with other workers When working around moving parts is unavoidable pay special attention to ensure that hands feet and clothing do not become entangled...

Page 148: ... on the left link is placed in LOCK position 5 remove your hand from cover 1 Cover 1 will be locked in place Before closing cover 1 confirm that radiator front cover 6 is locked with lock 7 When closing cover 1 while raising cover 1 push stopper 4 at the arrowed position a to disengage the lock While pushing stopper 4 lower cover 1 When cover 1 is lowered by the 1 4 stroke leave stopper 4 Then low...

Page 149: ... left link is placed in LOCK position 5 remove your hand from cover 1 Cover 1 will be locked in place Before closing cover 1 confirm that radiator front cover 6 is locked with lock 7 When closing cover 1 while raising cover 1 push stopper 4 at the arrowed position a to disengage the lock While pushing stopper 4 lower cover 1 When cover 1 is lowered by the 1 4 stroke leave stopper 4 Then lower cove...

Page 150: ...t Cover 1 Insert the key into keyhole 2 and rotate the key clockwise to unlock the key Open cover 1 2 When closing cover 1 insert the key into keyhole 2 and rotate the key counterclockwise to lock cover 1 Hydraulic Oil Tank Cover Remove bolts 4 2 used to open cover 3 When closing the cover securely tighten bolts 4 Remove bolts 6 3 used to open cover 5 When closing the cover securely tighten bolts ...

Page 151: ...tton 2 and raise cover 1 to open cover 1 2 Raise cover 1 until stopper 3 fits into the lock position on bracket 4 3 Confirm that stopper 3 is in the LOCK position before releasing your hands dCAUTION When closing cover 1 confirm that cover 1 is securely locked 4 When closing cover 1 push stopper 3 while raising cover 1 by hand 5 Lower cover 1 while pushing stopper 3 Release stopper 3 when cover 1 ...

Page 152: ...r release lock 2 after opening engine cover 1 After opening the radiator front cover be sure to insert rod 3 into lock hole 4 to lock the cover When closing the radiator front cover store rod 3 into rod storing hook 5 while raising rod 3 Serial No 021095 and up When opening the radiator front cover release lock 2 by lifting up the bar after opening engine cover 1 After opening the radiator front c...

Page 153: ...g in personal injury When opening or closing the hood and access covers take extra care not to catch fingers between the base machine and the hood or access covers When opening the radiator front cover release lock 2 after opening engine cover 1 Open the radiator front cover until rod 3 fits into the lock position on rail groove 4 Raise rod 3 to release lock before closing the radiator front cover...

Page 154: ...rs during first time operation up to 500 hours Maintenance required only during first time IMPORTANT Grease front joint pins every day until break in operation 50 hours is complete B Engine Parts Quantity Interval Hours Page 8 50 100 250 500 1000 2000 1 Engine Oil Check Oil Level 1 7 27 2 Engine Oil Change ZX17U 5A 2 8 L 3 0 US qt 7 28 ZX26U 5A 3 5 L 3 7 US qt 3 Engine Oil Filter Replace 1 7 28 As...

Page 155: ... 48 Changing interval differs according to the brand of hydraulic oil used kind of filter element or average attachment operating availability Refer to the Change Hydraulic Oil and Replace Full Flow Filter Element Maintenance required only during first time E Fuel System Parts Quantity Interval Hours Page 8 50 100 250 500 1000 2000 1 Check Fuel Level 1 7 55 2 Check Water Separator 1 7 56 3 Drain F...

Page 156: ...st IMPORTANT Use soft water as a coolant Do not use strong acid or alkaline water Use the coolant with genuine Hitachi Long Life Coolant LLC mixed by 30 to 50 If a coolant mixed with less than 30 of Hitachi Long Life Coolant is used service life of the cooling parts may be shortened due to damage by freezing or corrosion of coolant system parts If mineral rich water is used for coolant water stain...

Page 157: ...ed machine As required 7 82 7 Check Clean and Function Check of Injection Nozzle 7 83 8 Inspect and Adjust Valve Clearance 7 83 9 Check and Adjust Injection Timing 7 83 10 Measure Engine Compression Pressure As required 7 83 11 Check Starter and Alternator 7 83 12 Check Crankcase Breather 7 83 13 Check Radiator Cap 7 83 14 Tightening and Retightening Torque of Nuts and Bolts 7 84 fNOTE Contact you...

Page 158: ...hese parts at the intervals shown in the table below Consult your nearest authorized dealer for correct replacement Periodic Replacement of Parts Replacement Intervals Engine Fuel hose Tank to Filter Every 2 years Fuel hose Tank to Injection Pump Engine rubber vibration insulator Every 5 years or 3000 hours whichever comes first Pump coupling Hydraulic System Main Body Pump suction hose Every 2 ye...

Page 159: ...olicy For details contact your nearest authorized dealer Recommended Engine Oil Kind of Oil Engine Oil Application Engine Crank Case Air Temp 20 to 30 C 4 to 86 F 15 to 40 C 5 to 104 F Recommended Products Hitachi Genuine Engine Oil 10W 30 DH 1 Hitachi Genuine Engine Oil 15W 40 DH 1 Alternative Products Viscosity 10W 30 15W 40 Specification JASO DH 1 IMPORTANT Hitachi Genuine Engine Oils are speci...

Page 160: ...orized dealer Recommended Hydraulic Oil Kind of Lubricant Hydraulic Oil Where to be applied Hydraulic System Change Interval 2000 hours 1000 hours Environmental Temp 20 to 40 C 4 to 104 F Recommended Products Super EX 46HN Alternative Product Product Conforming to JCMAS HK VG46W fNOTE A different interval of oil change may be required for Alternative Products For details contact your nearest autho...

Page 161: ...e Oil Pan Engine Oil Super Wide DH 1 10W30 Super Wide DH 1 15W40 Travel Device Gear Oil Hitachi Gear Oil GL 4_90 Hydraulic System Hydraulic Oil Tank Hydraulic Oil Super EX46HN Fuel Tank Diesel Fuel ASTM Grade No 2 D S15 ASTM Grade No 1 D S15 Grease Nipple Lithium Grease SEP Grease Radiator Coolant Genuine Hitachi LLC Long Life Coolant ...

Page 162: ...ry 100 hours Swing Post and Others every 500 hours or every year every 100 hours during first time operation up to 500 hours Lubricate all fittings shown in the figure Bucket Boom Cylinder Bottom Side Boom Cylinder Rod Side M1M7 05 024 M1M7 07 020 M1M7 07 021 M503 07 092 ...

Page 163: ...MAINTENANCE 7 23 Boom Foot Arm Cylinder Rod Side Bucket Cylinder Bottom Side Boom and Arm Joint Pin Arm Cylinder Bottom Side M571 07 006 M585 07 046 ZX17U 5A MABA 00 001 ZX26U 5A MABC 07 005 ...

Page 164: ...MAINTENANCE 7 24 Swing Cylinder Swing Post Blade Pins ZX26U 5A every 500 hours first time after 250 hours or every year Blade Joint Pins ZX26U 5A MABC 07 004 M1M7 07 023 MABA 07 014 ...

Page 165: ... described on page 7 7 for preparation for inspection and maintenance 2 Apply grease via grease fitting 1 with a grease gun by two to three strokes 3 Start the engine Push pilot control shut off lever to the UNLOCK position 4 Raise the bucket approx 200 mm 8 in above the ground and rotate the upperstructure 90 1 4 turn 5 Lower the bucket to the ground 6 Repeat the procedure Step 1 to 5 eight times...

Page 166: ...fitting 1 4 Start the engine Push the pilot control shut off lever to the UNLOCK position 5 Raise the bucket approx 200 mm 8 in above the ground and rotate the upperstructure 90 1 4 turn 6 Lower the bucket to the ground 7 Repeat the procedure Step 1 to 6 four times 8 Apply grease by the quantity shown in the below table If the grease is contaminated remove all old grease and replace with new greas...

Page 167: ... Check oil level before starting the engine Open the engine cover and pull out oil level gauge 1 Wipe oil level gauge 1 with cloth re insert it into the pipe to the end and then pull it out again The oil level should be between the upper and lower marks on oil level gauge 1 If oil level is below the lower limit mark add the recommended engine oil via oil filler 2 If oil level exceeds the upper lim...

Page 168: ...Place 10 liter container under the engine oil pan Remove oil filler cap 2 3 Remove drain plug 3 to drain oil 4 Then allow oil to drain through a clean cloth into a container ZX17U 5A 2 8 L 3 0 US qt ZX26U 5A 3 5 L 3 7 US qt 5 After all oil has been drained inspect the cloth for any debris such as small pieces of metal 6 Securely install drain plug 3 Wrench size 17 mm Tightening Torque 30 N m 3 kgf...

Page 169: ...e sure to use only genuine engine oil filter 4 Failure to use genuine parts or replace engine oil filter 4 may damage the engine 9 Apply a thin layer of clean oil to new engine oil filter 4 gasket O ring 10 Install new engine oil filter 4 Turn the filter cartridge clockwise by hand until the gasket touches the contact area Be sure not to damage the gasket when installing engine oil filter 4 11 Tig...

Page 170: ... oil and grease chart on page 7 19 for the brand names of oils 13 Install oil filler cap 2 14 Start the engine Run the engine at slow idle for 5 minutes 15 Stop the engine Remove the key from the key switch 16 Check for any leakage from the sealing surface 17 After 15 minutes check oil level on the dipstick and add or drain oil to maintain proper oil level The oil level should be between the upper...

Page 171: ...r oil to cool and then gradually loosen the air release plug to release pressure 4 After gear oil has cooled slowly loosen air release plug 1 to release pressure 5 Remove air release plug 1 and oil level check plug 2 Oil must be up to the bottom of the plug 2 screw hole 6 If necessary add oil until oil flows out of oil level check plug 2 screw hole 7 Clean and install air release plug 1 and oil le...

Page 172: ... and maintenance dWARNING Keep body and face away from the air release plug Gear oil may be hot just after operation Wait for gear oil to cool and then gradually loosen the air release plug to release pressure 4 After gear oil has cooled slowly loosen air release plug 1 to release pressure And temporarily retighten plug 1 5 Remove drain plug 3 and plug 1 in that order to drain gear oil 6 Clean dra...

Page 173: ... 63 US qt fNOTE Refer to the recommended oil and grease chart on page 7 19 for the brand names of oils 9 Clean and install air release plug 1 and oil level check plug 2 Model Tightening Torque ZX17U 5A 29 to 39 N m 3 to 4 kgf m 21 5 to 29 lbf ft ZX26U 5A 30 to 40 N m 3 to 4 kgf m 22 to 29 5 lbf ft 10 Repeat steps 2 to 9 for the other travel reduction gear 1 2 3 M585 07 080 ...

Page 174: ... for specified time around 10 seconds after stopping the engine 2 2 Bleed air from the hydraulic oil tank to release internal pressure 2 3 Immediately after operation all hydraulic components and hydraulic oil or lubricants are hot and highly pressurized Begin inspection and or maintenance work only after the machine has cooled down Servicing heated and pressurized hydraulic components may cause p...

Page 175: ...hoses to twist when connecting them The life of twisted hoses will be shortened considerably Do not use hydraulic oils other than those listed in the table Brand names of recommended hydraulic oil When adding hydraulic oil always use the same brand of oil do not mix brands of oil When using another manufacturer s hydraulic oil be sure to change the full amount The new machine is filled with hydrau...

Page 176: ... brand Refer to the Hydraulic System Changing intervals for the high performance element micro glass ZX26U 5A Optional Breaker Operation Availability 0 10 20 30 40 50 60 70 80 90 100 Full Flow Filter 1000 670 510 410 340 290 250 215 195 180 170 Hydraulic oil 1500 hours life time 1500 1260 1100 980 895 820 760 700 640 600 560 Hydraulic oil 3000 hours life time 3000 2300 1850 1500 1250 1080 935 800 ...

Page 177: ...380 360 340 330 320 Hydraulic oil 2000 hours life time 2000 1310 980 780 650 550 480 430 385 350 320 Average Breaker Operation Availability Changing Intervals hour When using filter paper element 0 200 400 600 800 1000 1200 1400 1600 1800 2000 0 10 20 30 40 50 60 70 80 90 100 Element Replacement Intervals Changing Interval when using 1000 hour life time Hydraulic Oil Changing Interval when using 2...

Page 178: ...ydraulic system If the oil level is higher than level gauge 1 remove oil down to the appropriate level using a pump 1 Park the machine following the same procedures as described on page 7 7 for preparation for inspection and maintenance 2 Check oil level with level gauge 1 at the side of the hydraulic oil tank Oil must be between marks on gauge 1 If necessary add oil M1M7 05 024 1 ZX17U 5A MABA 07...

Page 179: ...to cool before starting work 1 Park the machine following the same procedures as described on page 7 7 for preparation for inspection and maintenance 2 After leaving the machine without operating to cool the oil temperature bleed air pressure from the hydraulic oil tank 3 Slowly loosen drain plug 1 on the bottom of the hydraulic oil tank to drain water and sediment M1M7 05 024 1 ZX17U 5A ZX26U 5A ...

Page 180: ...aulic oil may be hot and pressurized just after operation Severe burns may result if skin comes in contact with escaping hydraulic oil Wait for the oil to cool before starting any maintenance work 1 Park the machine following the same procedures as described on page 7 7 for preparation for inspection and maintenance 2 Open the tank cover Clean the top of the hydraulic oil tank to keep dirt out of ...

Page 181: ...and into the hydraulic oil tank 8 Clean the hydraulic oil tank interior and suction filter 6 9 Install suction filter 6 and cover 2 to the hydraulic oil tank 10 Clean install and tighten drain plug 3 11 Add oil until it is between the marks on the oil level gauge 12 Bleed air from the hydraulic system Refer to the Bleed Air from Hydraulic System Wrench size 13 mm Tightening Torque 20 N m 2 kgf m 1...

Page 182: ...e right Securely insert rod assembly 5 into the pipe 10 Clean install and tighten drain plug 3 Tools Wrench and others Size PT3 8 Square Head R Plug Screw Wrench Size 12 Tightening Torque 50 N m 5 kgf m 37 lbf ft 11 Add oil until it is between the marks on the oil level gauge 12 Before securing cover 2 with bolts ensure the top edge of the rod assembly 5 is completely inserted into the hole of sup...

Page 183: ...e control lever in the slow idle position 5 Start the engine Wait 5 to 10 seconds Stop the engine 6 Check the hydraulic oil level at the level gauge located on the side of the hydraulic oil tank Add hydraulic oil if necessary 7 Restart the engine Confirm that hydraulic oil level in the hydraulic oil tank is sufficient Run the engine for approximately 1 minute 8 This is the end of the hydraulic pum...

Page 184: ...re starting any maintenance work 1 Park the machine following the same procedures as described on page 7 7 for preparation for inspection and maintenance 2 Before replacing element 6 be sure to bleed air pressure from the hydraulic oil tank by loosening cap 7 3 Loosen bolts 1 4 used to remove cover 2 and O ring 3 When removing cover 2 slowly remove cover 2 while pressing cover 2 downward so that s...

Page 185: ...1 kgf m 7 4 lbf ft 9 After replacing the filter element bleed air from the hydraulic system and check the oil level in the hydraulic oil tank Refer to the Bleed Air from Hydraulic System If the machine is operated with air mixed in the hydraulic circuit damage to the pump may result 10 Replace element 6 at the regular interval to keep hydraulic oil clean and to extend the service life of the hydra...

Page 186: ...ore starting any maintenance work 1 Park the machine following the same procedures as described on page 7 7 for preparation for inspection and maintenance 2 Before replacing the element be sure to bleed air pressure from the hydraulic oil tank by loosening cap 1 3 Remove bolts 3 under cover 2 of rear left side Wrench size 17 mm M1M7 05 024 1 ZX17U 5A MABA 07 022 ZX26U 5A MABA 07 024 1 ZX17U 5A MAB...

Page 187: ... not to allow dust and or water enter filter case 6 11 Install filter case 6 into filter head 5 while rotating filter case 6 clockwise Tightening Torque 25 to 35 N m 2 5 to 3 5 kgf m 18 0 to 26 lbf ft 12 After replacing the filter element bleed air from the hydraulic system and check the oil level in the hydraulic oil tank Refer to the Bleed Air from Hydraulic System If the machine is operated wit...

Page 188: ...to protect hands and body from high pressure fluids If an accident occurs see a doctor familiar with this type of injury immediately Tighten repair or replace any missing loose or damaged clamps hoses and lines Do not bend or strike high pressure lines Never install bent or damaged hoses or lines According to the check points shown below check hoses and lines for oil leaks and damage If any abnorm...

Page 189: ...lities Remedies Daily Contact surfaces of flange joints Leak 11 Replace Bolts Loose or leak 11 Retighten or replace O ring Welded surfaces on flange joints Leak 12 Replace Every 250 hours Flange joint neck Crack 13 Replace Welded surfaces on flange joints Crack 12 Replace Clamps Missing or deformation Loose bolts Replace or retighten Oil Cooler Interval Hours Check Points Abnormalities Remedies Ev...

Page 190: ... metal flare 4 and metal flare seat 3 1 Inspect flare 4 and flare seat 3 They must be free of dirt or obvious defects 2 Tighten fitting 1 by hand 3 Tighten fitting 1 or nut 2 to the torque values shown Do not allow a hose to twist when tightening fittings 10 Wrench size mm 17 19 22 27 Tightening Torque N m 25 30 40 65 kgf m 2 5 3 4 6 5 lbf ft 18 22 29 5 47 1 3 2 4 Metal Body M202 07 051 ...

Page 191: ... socket ring 1 counterclockwise disconnect the coupler As no check valve is provided in the coupler take care that oil may flow out of the coupler when the coupler is disconnected 2 2 After the coupler is disconnected plug the holes with the exclusively prepared plugs IMPORTANT Take care not to damage the joint surfaces when disconnecting or connecting the coupler Before disconnecting or connectin...

Page 192: ...ce is diagonally applied the coupler may be difficult to disconnect However the coupler may be easily disconnected in this case when oil pressure increases Take care not to diagonally push the coupler Failure to do so may damage the inner parts cause oil leak and or unexpected coupler disconnection 2 Disconnection Procedure Be sure to disconnect the coupler only after removing any foreign matter s...

Page 193: ... Coupler 1 Before connecting the coupler be sure to check the coupler surface for any adhered foreign matter Clean to remove the foreign matter if any Adhered foreign matter may cause oil leaks and or disconnection of the coupler 2 When a hose clamping is required put a clamp 200 mm away from the joint edge If the hose is clamped as illustrated to the right the coupler joint may slide as oil press...

Page 194: ...quality or high quality DIESEL FUEL JIS K 2204 ASTM 2 D Kerosene must NOT be used Besides using bad quality fuel drainage agent fuel additives gasoline kerosene or alcohol refueled or mixed with specified fuel may deteriorate performance of fuel filters and cause sliding problem at lubricated contacts in the injector It also affects the engine parts leading to malfunction Using fuel other than ult...

Page 195: ...RTANT Keep all dirt dust water and other foreign materials out of the fuel system when refilling fuel fNOTE ZX26U 5A Even if all segments on fuel gauge 1 on the monitor panel are lit the fuel tank may not be full Check both fuel gauge 1 on the monitor panel and level gauge 3 3 To avoid condensation fill the tank at the end of each day s operation Take care not to spill fuel on the machine or groun...

Page 196: ... water 5 Clean filter cup 2 and filter while draining water After draining water securely tighten filter cup 2 to water separator 1 with ring nut 4 6 Open fuel cock 3 IMPORTANT After draining water from the water separator bleed air from the fuel supply system Bleed Air from Fuel System Air in the fuel system will cause the engine to start hard and or run roughly Be sure to bleed air from the syst...

Page 197: ...ght access cover 1 by loosening bolts 2 3 Place a 0 5 liters or larger capacity container under drain valve 3 to collect the drained water 4 Open drain valve 3 to drain water and or sediment 5 After draining water securely tighten drain valve 3 6 Install right access cover 1 with bolts 2 MABA 07 051 MABA 07 052 MABA 07 053 MABA 07 054 1 2 ZX17U 5A ZX26U 5A ZX17U 5A ZX26U 5A 1 2 3 3 ...

Page 198: ...ocedures as described on page 7 7 for preparation for inspection and maintenance 2 Close fuel cock 6 3 Place a 0 5 liter or larger capacity container under fuel filter 1 4 Loosen ring nut 3 of fuel filter 1 Remove filter cup 4 5 Replace element 2 with a new one 6 Clean filter cup 4 Install new element 2 Install filter cup 4 with ring nut 3 7 Open fuel cock 6 8 Loosen air bleed plug 5 When fuel com...

Page 199: ... or damaged hoses According to the check points shown below check hoses for oil leaks and damage If any abnormality is found replace or retighten the hose as instructed in the table Hose Interval hours Check Points Abnormalities Remedies Daily Hose ends Leak 1 Retighten or replace Hose covers Wear crack 2 Replace Every 250 hours Hose covers Crack 3 Replace Hose ends Crack 4 Replace Hose Bend 5 Col...

Page 200: ...tanders guard against flying chips and wear personal protection equipment including goggles or safety glasses IMPORTANT To clean element 1 avoid giving shocks or striking element 1 with other objects 5 Clean element 1 by blowing compressed air less than 0 69 MPa 7 kgf cm2 outward from the inside of the filter element After cleaning be sure to check element 1 for any damage If any damage is found r...

Page 201: ...20 25 30 dCAUTION Precautions for handling antifreeze Antifreeze is poisonous if ingested it can cause serious injury or death Induce vomiting and get emergency medical attention immediately If antifreeze is accidentally splashed into eyes flush with water for 10 to 15 minutes and get emergency medical attention When storing antifreeze be sure to keep it in a clearly marked container with a tight ...

Page 202: ... burns After the coolant temperature has lowered slowly loosen cap 1 to release the inside air pressure before removing cap 1 If coolant reservoir 2 is empty add coolant through cap 1 of the radiator Remove bolt 3 and cover 4 for ZX17U 5A When refilling a long life coolant LLC use the same brand product and the same mixture ratio as already used in the machine If only water is refilled the mixture...

Page 203: ... fan pulley 1 and alternator pulley 2 Visually check the belt for wear Replace if necessary Adjust Fan Belt Tension ZX17U 5A 1 Remove bolts 4 4 used and knobs 8 2 used Remove covers 3 to open the checking port 2 Loosen adjusting bolt 6 and mounting bolt 7 of alternator 5 3 Adjust belt tension by moving alternator 5 forward or backward 4 Securely tighten bolts 6 and 7 IMPORTANT When a new belt is i...

Page 204: ...ernator 13 3 Adjust belt tension by moving alternator 13 forward or backward 4 Securely tighten bolts 14 and 15 IMPORTANT When a new belt is installed be sure to re adjust the tension after operating the engine for 3 to 5 minutes at slow idle speed to be sure that the new belt is seated correctly fNOTE Four bolts 9 are used for ZX26U 5A cab spec machine 14 13 15 10 9 MABA 07 040 12 11 MABA 07 041 ...

Page 205: ...first dWARNING Do not loosen radiator cap 1 until the coolant temperature in the radiator has cooled Hot steam may spout out possibly causing severe burns Loosen the cap slowly Release all pressure before removing the cap IMPORTANT Use soft water as a coolant Do not use strong acid or alkaline water Use the coolant with genuine Hitachi Long Life Coolant LLC mixed by 30 to 50 ZX17U 5A 1 MABA 07 036...

Page 206: ... slightly higher than slow idle to raise the coolant temperature until the first two segments come on Then run the engine further for about 10 minutes 4 Stop the engine and open radiator drain cock 2 Flush out the cooling system with tap water until draining water is clear This helps remove rust and sediment 5 Close drain cock 2 on the radiator Fill the radiator with tap water and LLC at the speci...

Page 207: ...oler inter cooler core remove them before starting the engine IMPORTANT Cover the air cleaner inlet opening to prevent the entry of dust and water while cleaning the radiator If air with pressure of higher than 0 2 MPa 2 kgf cm2 or tap water with high delivery pressure is used for cleaning damage to the radiator oil cooler fins may result Use the nozzle at 500 mm or more from the object Check the ...

Page 208: ...emoved Do not keep tools metals or flammable materials around the battery or inside the battery room If a metal tool is placed across the battery terminal and a vehicle component such as the engine block sparks may be created possibly resulting in fire and or explosion Do not continue to use or charge the battery when electrolyte level is lower than specified Explosion of the battery may result Ch...

Page 209: ...arging the batteries If the battery is used with the electrolyte level lower than the specified lower level the battery may deteriorate quickly Do not refill electrolyte more than the specified upper level Electrolyte may spill damaging the painted surfaces and or corroding other machine parts fNOTE In case electrolyte is refilled more than the specified upper level line or beyond the bottom end o...

Page 210: ...e the accurate electrolyte level in this case Therefore when the electrolyte level is flush with the U L the level is judged to be proper Then referring to the right illustrations check the level When the electrolyte level is lower than the bottom end of the sleeve refill with distilled water or commercial battery fluid up to the bottom end of the sleeve Be sure to refill with distilled water befo...

Page 211: ...rself 1 Flush your skin with water 2 Apply baking soda or lime to help neutralize the acid 3 If splashed in eyes flush with water for 15 to 30 minutes Get medical attention immediately If acid is swallowed 1 Do not induce vomiting 2 Drink large amounts of water or milk 3 Get medical attention immediately IMPORTANT Check the specific gravity of the electrolyte after it is cooled not immediately aft...

Page 212: ... 10 A OPTION ALARM 10 A LIGHT 5 A ENGINE 5 A MONITOR ACC 10 A PILOT SHUT OFF TRAVEL ILLUMI 5 A MONITOR GLOW 20 A POWER SOCKET ZX26U 5A 5 A START 5 A HORN MONITOR B RADIO OPT POWER 10 A OPT RADIO ACC OPT POWER ACC 20 A LIGHT CAB SOCKET 10 A ENGINE 5 A MONITOR ACC 5 A PILOT SHUT OFF TRAVEL ILLUMI 5 A MONITOR GLOW 20 A POWER SOCKET fNOTE One each spare fuse for respective fuse capacities is provided ...

Page 213: ...quipment appropriate to the job Procedures 1 Use hammer 2 and drift 3 to drive out locking pin 5 Take care not to damage rubber pin lock 4 2 Check locking pin 5 and rubber pin lock 4 Short locking pins and damaged rubber pin locks must be replaced with new ones WRONG 1 4 A 5 RIGHT WRONG Flush one end of the locking pin to evaluate In this instance the locking pin is too short Crack on the rubber T...

Page 214: ... surface 4 Install rubber pin lock 4 into shank 6 hole as shown 5 Position new teeth 1 over shank 6 6 Drive locking pin 5 fully into the hole as shown RIGHT RIGHT RIGHT WRONG WRONG WRONG 6 6 1 1 5 4 M104 07 060 M104 07 061 M104 07 062 ...

Page 215: ... on the ground Be sure the bucket will not roll when the pins are removed 2 Slide the O rings out of the way as shown 3 Remove bucket pins A and B to separate the arm and bucket Installation 1 Clean the pins and pin bores Apply sufficient grease to the pins and pin bores 2 Place the new bucket in a stable position 3 Fit the arm and alternate bucket Be sure the bucket will not roll Install bucket p...

Page 216: ...k Sag 1 If track sag is not within specifications loosen or tighten the track following the procedures shown on the next page 2 When adjusting track sag lower the bucket to the ground to raise one track off the ground Repeat this procedure to raise the other track Each time be sure to place blocks under the machine frame to support the machine To prevent accidents care should be taken to ensure th...

Page 217: ... the raised track dCAUTION To prevent accidents care should be taken to ensure that hands feet and any body parts do not become entangled when working around the tracks 4 When proper track sag is obtained turn valve 1 clockwise to the original condition Tightening Torque 90 N m 9 kgf m 66 5 lbf ft dCAUTION Consult your authorized dealer if grease is not sufficiently drained Tighten the Track Rubbe...

Page 218: ...nd or death may result Be sure to remove the rubber track only after taking appropriate measures to prevent the front idler from coming off Removing Rubber Crawler 1 Lower the bucket and blade to raise one track off the ground as shown Place blocks under machine frame to support the machine 2 Slowly turn valve 1 to allow grease to escape from the grease outlet 3 Insert two or three steel pipes int...

Page 219: ...rce to the rubber track to seat it on the idler 5 Insert a steel pipe into gaps among lower rollers track frame and rubber track and rotate the rubber track slowly to correctly seat the rubber track on the idler 6 Confirm that the rubber track is correctly engaged with the sprocket and idler 7 Adjust track sag Refer to Adjust Track Sag 8 After checking that the rubber track is correctly engaged wi...

Page 220: ...ot allow anyone to stand in front of the front idler After the rubber track is removed the front idle will become free If the front idle comes off unexpectedly personal injury and or death may result Be sure to remove the rubber track only after taking appropriate measures to prevent the front idler from coming off Consult your authorized dealer for replacing the track When replacing the track cha...

Page 221: ...ng the machine thoroughly examine belt 1 buckle 2 and attaching hardware 3 If any item is damaged or materially worn replace the seat belt or component before operating the machine We recommend that the seat belt be replaced every three years regardless of its apparent condition 2 3 1 MABA 07 048 ...

Page 222: ...electrical parts may be damaged 1 Park the machine following the same procedures as described on page 7 7 for preparation for inspection and maintenance 2 Sweep the cab floor clean using a brush and brush dust from the cab floor while spraying water Sweep out the mud and dust with a brush as much as possible before applying water 3 When cleaning the floor mat sweep dust water along the grooves on ...

Page 223: ...ection Timing every 1500 hours Consult your authorized dealer for check and repair Measure Engine Compression Pressure as required Consult your authorized dealer for check and repair Check Starter and Alternator every 1000 hours Consult your authorized dealer for check and repair Check Crankcase Breather every 1500 hours Consult your authorized dealer for check and repair Check Radiator Cap every ...

Page 224: ...dance with the torque values shown in the following table Nuts and bolts should be replaced with those of the same or higher grade Check tightness after the first 50 hours then every 250 hours For tightening nuts and bolts other than specified in the table below refer to the Tightening Torque Chart at the end of this section Consult your authorized dealer for check and repair ...

Page 225: ...Control valve mounting bolts 10 4 17 50 5 36 Control valve base mounting bolts 10 4 17 50 5 36 8 Swing device mounting bolts 12 4 19 90 9 65 9 Battery mounting nuts 6 4 10 5 0 5 3 5 10 Canopy mounting bolts 10 4 17 50 5 36 14 5 22 140 14 101 11 Swing bearing mounting bolts Upperstructure 10 16 17 50 5 36 Undercarriage 10 18 17 50 5 36 12 Travel device mounting bolts 10 16 8 Socket 65 6 5 47 13 Spr...

Page 226: ...nting bolts 10 4 17 50 5 36 Control valve base mounting bolts 10 4 17 50 5 36 8 Swing device mounting bolts 12 4 19 90 9 65 9 Battery mounting nuts 6 4 10 5 0 5 3 5 10 Canopy mounting bolts 12 8 19 110 11 81 11 Cab mounting bolts 12 11 19 110 11 81 12 Swing bearing mounting bolts Upperstructure ZX26U 5A 12 16 19 110 11 81 Undercarriage ZX26U 5A 12 20 19 110 11 81 13 Travel device mounting bolts 12...

Page 227: ...0 220 22 160 M24 36 19 950 95 700 700 70 520 280 28 205 M27 41 19 1400 140 1030 1050 105 770 400 40 295 M30 46 22 1950 195 1440 1450 145 1070 550 55 410 M33 50 24 2600 260 1920 1950 195 1440 750 75 550 M36 55 27 3200 320 2360 2450 245 1810 950 95 700 dCAUTION If fixing bolts for counterweight are loosened consult your nearest authorized dealer IMPORTANT Apply lubricant e g white zinc B solved into...

Page 228: ...MAINTENANCE 7 88 MEMO ...

Page 229: ...vice intervals Radiator Clean the oil cooler screen to prevent clogging of the radiator core Fuel System Clean the filter element and strainer regularly at shorter service intervals Electrical Parts Clean the commutator especially for the starter and alternator Rocky Ground Track Carefully operate while checking for cracks damage and loose bolts and nuts Do not use rubber crawlers Front Attachment...

Page 230: ...MAINTENANCE UNDER SPECIAL ENVIRONMENTAL CONDITIONS 9 2 MEMO ...

Page 231: ...eading NO COOLANT Protection Against Dust and Moisture Store the machine in a dry storage area using a protective cover Tools Inspect and repair then store Lubrication Operation If oil film on the metal surfaces is lost rust may begin possibly causing abnormal wear of the machine when the machine operation is restarted If the machine is stored for a long time operate hydraulic functions for travel...

Page 232: ...STORAGE 10 2 MEMO ...

Page 233: ...lectronic components Engine Consult the nearest Hitachi dealer for the engine troubleshooting Engine Auxiliaries Problem Cause Solution Batteries will not be charged Broken battery separator Replace Faulty regulator Adjust and replace Faulty ground line Repair Faulty alternator Repair or replace Batteries discharge quickly after being charged Shorted cable Repair or replace Shorted battery separat...

Page 234: ...l system Repair and adjust Starter rotates No fuel After checking that no fuel is leaking refill fuel Faulty injection pump Repair and adjust Air in the fuel system Bleed air Clogged fuel filter After draining water replace the element Frozen fuel Warm the fuel pump with hot water or wait until the atmospheric temperature rises Faulty preheat system Repair and adjust Even though the engine is star...

Page 235: ...orn pusher Replace Does not move smoothly Worn pusher Repair or replace Faulty pilot valve Replace Does not return to neutral Faulty pilot valve Replace The lever is tilted in the neutral position due to increase in play Worn joint Repair or replace Faulty pilot valve Replace Mark Consult your authorized Hitachi dealer ...

Page 236: ...s pilot shut off solenoid valve pilot shut off switch Repair or replace The pilot control shut off lever is in the LOCK position Turn the pilot shut off lever to the UNLOCK position All actuators have no power Malfunction due to worn hydraulic pump Replace Decreased main relief valve set pressure in the control valve Adjust Lack of hydraulic oil Refill Clogged suction strainer in the hydraulic oil...

Page 237: ...ty pilot circuit line Repair or replace Only one cylinder is inoperable or has no power Broken oil seal in cylinder Repair or replace Oil leak due to damage to cylinder rod Repair or replace Faulty pilot valve Replace Faulty pilot circuit line Repair or replace Low set pressure of main or port relief valve boom arm and bucket Adjust and replace Hydraulic oil temperature increases Stained oil coole...

Page 238: ...unter balance valve Replace Does not travel smoothly Overly tensioned or slackened crawler sag Adjust Deformed track frame Repair or replace Embedded foreign matter such as rock fragments Remove Dragged parking brake Repair Faulty counter balance valve Replace Travel speed does not change Faulty travel speed switch Replace Poor contact in connector Repair or replace Damaged wire harness Repair Fau...

Page 239: ...essure of swing relief valve Adjust and replace Mark Consult your authorized Hitachi dealer Immediately after the control valve swing motor relief valve and or the swing motor is replaced a noise may be emitted and or operation may not be performed smoothly due to air trapped in the hydraulic line Slowly continue to operate the machine for approx 10 minutes to bleed air After repair work is comple...

Page 240: ...TROUBLESHOOTING 11 8 MEMO ...

Page 241: ...m ft in 165 7 E Counterweight Clearance mm ft in 450 1 6 F Engine Cover Height mm ft in 1150 3 9 G Undercarriage Length mm ft in 1570 5 2 H Undercarriage Width mm ft in 980 3 3 1280 4 2 I Sprocket Center to Idler Center mm ft in 1210 4 J Track Shoe Width mm ft in 230 9 Ground Pressure kPa kgf cm2 psi 26 6 0 27 3 9 Swing Speed min 1 rpm 9 4 9 4 Travel Speed fast slow km h mph 4 2 2 4 2 6 1 5 Gradea...

Page 242: ...ll Length mm ft in 3500 11 6 G Minimum Swing Radius mm ft in 1530 5 H Boom Swing Pivot Offset Distance mm ft in 105 4 I Blade Bottom Highest Position mm ft in 285 11 J Blade Bottom Lowest Position mm ft in 225 9 K Offset Distance mm ft in L355 1 2 R555 1 10 fNOTE The dimensions do not include the height of the shoe lug The dimensions of the machine equipped with rubber crawlers are shown L Left R ...

Page 243: ...ried loosened earth sand mud and so on Their bulk density shall be less than 1600 kg m as a standard Loading work For loading operation of dried loosened earth and sand Their bulk density shall be less than 1100 kg m as a standard Bucket Types and Applications ZX17U 5A Bucket Bucket Capacity m yd ISO Heaped Bucket Width mm Front End Attachment With side cutter mm in Without side cutter mm in 0 93 ...

Page 244: ... Clearance mm ft in 530 1 9 F Engine Cover Height mm ft in 1490 4 11 1470 4 10 G Undercarriage Length mm ft in 1960 6 5 H Undercarriage Width mm ft in 1500 4 11 I Sprocket Center to Idler Center mm ft in 1530 5 J Track Shoe Width mm ft in 300 1 Ground Pressure kPa kgf cm2 psi 24 8 0 25 3 6 25 7 0 26 3 7 Swing Speed min 1 rpm 9 1 9 1 Travel Speed fast slow km h mph 4 5 2 9 2 8 1 8 Gradeability 25 t...

Page 245: ...t in 2430 7 12 F Overall Length mm ft in 4180 13 9 4180 13 9 G Minimum Swing Radius mm ft in 1940 6 4 2020 6 8 H Boom Swing Pivot Offset Distance mm ft in 85 3 I Blade Bottom Highest Position mm ft in 320 1 1 J Blade Bottom Lowest Position mm ft in 315 1 1 K Offset Distance mm ft in L555 1 10 R700 2 4 fNOTE The dimensions do not include the height of the shoe lug The dimensions of the machine equi...

Page 246: ...d gravel clay ordinary earth and so on Light duty excavating For digging and loading operation of dried loosened earth sand mud and so on Their bulk density shall be less than 1600 kg m as a standard Bucket Types and Applications ZX26U 5A Bucket Bucket Capacity m yd ISO Heaped Bucket Width mm Front End Attachment With side cutter mm in Without side cutter mm in 1 30 m 4 3 Arm Hoe Bucket 0 05 0 065...

Page 247: ... hands and arms will be exposed is lower than 2 5 m s Entire body The acceleration to which the operator s entire body will be exposed is lower than 0 5 m s fNOTE The acceleration is measured in accordance with ISO 2631 1 ISO 5349 and SAE J1166 Dozer blade on ground Electric Fans We consider our products exempted from EU regulation 327 2011 implementing EU directive 2009 125 EC based on the fact t...

Page 248: ...full hydraulic capacity ISO 10567 Net lifting capacities are equal to the values obtained by deducting the ATT mass from the values described in the table below ZX17U 5A Boom 1 82 m Counterweight 120 kg Canopy Unit kg Arm X Z 1 2 3 MAX REACH m 0 93 m Z2 420 230 200 3 27 Z1 390 220 210 3 15 Z3 1120 390 280 2 58 2 Z m 1 0 1 2 0 1 2 3 4 Z2 Z1 Z3 3 X m MABA 12 009 ...

Page 249: ... 3 4 MAX REACH m 1 30 m Z2 370 240 230 4 07 Z1 620 350 240 3 90 Z3 1680 630 350 300 3 35 Boom 2 10 m Counterweight 150 kg Cab Unit kg Arm X Z 1 2 3 4 MAX REACH m 1 30 m Z2 380 240 240 4 07 Z1 640 360 250 3 90 Z3 1680 650 360 310 3 35 2 Z m 1 0 1 2 3 0 1 2 3 4 Z2 Z1 Z3 5 3 4 X m MABA 12 010 ...

Page 250: ...SPECIFICATIONS 12 10 MEMO ...

Page 251: ...avoid damaging the machine hydraulic breaker crusher or quick coupler follow the precautions given below Precautions for connecting breaker crusher or quick coupler piping Do not allow impurities to enter into the system when disconnecting connecting hoses of the breaker crusher or the quick coupler with the arm end piping When the breaker crusher or quick coupler is not installed always install c...

Page 252: ...maximum operating weight of the ROPS making the ROPS unable to assure the protective function for operator Refer to the ROPS certification affixed in the cab for the allowable maximum operating weight Specification Base Machine Breaker Crusher Pulverizer Model Arm Std Weight Max Weight Std Weight Max Weight Zero Tail Swing Model ZX17U 5A Std 70 80 90 100 ZX26U 5A Cab Std 180 200 220 250 Canopy Std...

Page 253: ... Pedal Operation and Hydraulic Oil Flow When the pedal is depressed to D side hydraulic oil flows into line B When the pedal is depressed to E side hydraulic oil flows into line C Stop Valves B C Close When not using attachment or is detached Open When using attachment Close Open E D A ZX17U 5A A ZX26U 5A MABA 13 006 MABA 13 007 ZX17U 5A ZX26U 5A MABA 13 008 MABA 13 009 MABA 13 003 MABA 07 037 MAB...

Page 254: ... not in use 1 Turn cover 1 of attachment pedal 2 forward 2 Depress attachment pedal 2 forward to operate the breaker 3 Remove foot from attachment pedal 2 to stop the breaker 4 Depress attachment pedal 2 forward and lock the pedal to continuously operate the breaker 5 When attachment pedal 2 is locked in the neutral position the breaker does not operate When the breaker is not in use lock the peda...

Page 255: ... any objects with breaker Doing so will result in damage to the breaker the front attachment and or the upperstructure Always move lower the breaker slowly to position the tip of the chisel on the object to be broken before starting breaker operation Avoid moving objects with breaker Do not use the breaker and or the bracket to move objects Especially do not use the swing function to move objects ...

Page 256: ...s Immediately consult your authorized Hitachi dealer Do not operate the breaker in water Doing so will cause rust and seal damage resulting in damage to the hydraulic system components Rust dust and water may enter into the hydraulic oil through the broken seal causing damage to the hydraulic system Do not use breaker for lifting operation The machine tipping over and or breaker damage may result ...

Page 257: ...hisel the axis is positioned and thrust perpendicular to the object Failure to do so may damage the chisel or may cause seized piston Do not operate the breaker continuously longer than one minute Failure to do so may result in premature wear of the chisel If an object could not be broken within one minute apply the chisel to other locations less than one minute for each location Watch Out Take ca...

Page 258: ...ont attachment Do not raise the front part of the undercarriage 150 mm or more by pressing down the breaker Do not operate breaker with the boom swing operation Do not operate the breaker for long period of time while swinging the boom Failure to do so may shorten the service life of the main frame Raising 10 to 15 cm Pressing Down OK M147 05 016 MADB 13 044 ...

Page 259: ...on attachment pedal 2 when the pedal is not in use 1 Turn cover 1 of attachment pedal 2 forward 2 Depress attachment pedal 2 backward and forward to operate the crusher 3 Remove foot from attachment pedal 2 to stop the crusher 4 When attachment pedal 2 is locked in the neutral position the crusher does not operate When the crusher is not in use lock the pedal in the neutral position Forward LOCK p...

Page 260: ...t cylinder fully extended or retracted Failure to do so may result in damage to the front attachment In particular avoid doing so with the bucket cylinder fully extended as the front attachment will be easily damaged Take care to prevent this from happening when dismantling foundation structures using the crusher Using the front attachment do not raise the base machine off the ground with the arm ...

Page 261: ...hen operating the crusher up high with the boom fully raised be careful of falling objects When operating the crusher on a floor in a building first confirm that the floor has sufficient strength to support the load caused by crushing in addition to the machine weight The load equivalent or higher than the machine weight may be applied on floor depending on the operation method MZX5 13 010 MZX5 13...

Page 262: ...er and bucket or crusher and breaker are used and replaced with each other at intervals impurities are more apt to enter the hydraulic system the hydraulic oil deteriorates quickly For this reason replace the hydraulic oil tank filter and change the hydraulic oil at the intervals specified in the breaker time sharing diagram in the previous section Always remove the crusher from the excavator befo...

Page 263: ...the customer It is recommended to change the password frequently to improve security If the customer forgets the password contact your authorized Hitachi dealer Keep open flames including burning cigarette away from the numeric keypad Use soft cloth to wipe the surface of the numeric keypad If the machine will not be in use for a long period of time disconnect the battery cables to prevent battery...

Page 264: ...the password by using numeric keypad 2 within 15 seconds after all numeric keys 2 are lit After 15 seconds all numeric keys 2 will go off and inputting is not accepted any longer On that occasion redo from the beginning by turning key switch 1 OFF once Locking After key switch 1 is turned OFF the machine will be locked automatically after the lapse of time set user defined for lock delay timer Whi...

Page 265: ...is entered at input of password 2 Locking indicator 6 red LED When locked indicator 6 slowly blinks Indicator 6 is lit when the 1st and 3rd digits are entered at the input of password 3 Numeric keys 2 1 9 and 0 Used for inputting the password and making various other kinds of setting 4 Key F 4 Used for function setting 5 Key C 5 Used primarily for cancelling input Besides this key is used to check...

Page 266: ... digit 5 Similarly input the 4th digit 6 If the input numerals coincide with those of the password the buzzer sounds twice and unlocking is done In this condition when key switch 1 is turned ON the engine will start fNOTE If mis input the password the entered numbers can be cancelled by pushing Key C 3 Alternatively redo from the beginning by turning key switch 1 OFF 1 M1M7 01 007 2 M1M7 OP1 01 00...

Page 267: ... 4 and 5 blink and the numerals of the new password are lit in turn After blinking the new password the password can be displayed by pushing Key C 6 fNOTE Registration is not made at this stage When the buzzer sounds 8 times and two indicators 4 and 5 alternately blink the input password was incorrect Start from item 3 again 7 Push Key F 2 for more than 2 seconds The buzzer sounds three times and ...

Page 268: ... key to set the lock delay timer List of lock time assigned to each key as timer Key 1 15 seconds Factory default Key 2 3 minutes Key 3 5 minutes Key 4 10 minutes Key 5 15 minutes Key 6 30 minutes Key 7 60 minutes Key 8 90 minutes Key 9 120 minutes Key 0 0 seconds 6 Push Key F 2 for more than 2 seconds The buzzer sounds three times and the change is registered This is the end of the procedure fNOT...

Page 269: ...key switch 1 is turned OFF After that horn and buzzer will sound to warn the operator every time key switch 1 is turned ON until the correct password is input System Error Display In case any abnormality occurs on the system two indicators blink alternately Consult your authorized Hitachi dealer Factory Default Setting Factory default setting is shown below 1 Password 0000 2 Lock delay timer set t...

Page 270: ...13 20 NUMERIC KEYPAD LOCK OPTIONAL ATTACHMENT MEMO ...

Page 271: ...n ZX26U 5A Cab Equipped Machine 1 8 Change Bucket 7 75 Change Coolant 7 65 Change Engine Oil 7 28 Change Hydraulic Oil 7 40 Check and Adjust Fan Belt Tension 7 63 Check and Adjust Injection Timing 7 83 Check and Replace Bucket Teeth 7 73 Check and Replace Seat Belt 7 81 Check Coolant Level 7 62 Check Crankcase Breather 7 83 Check Fuel Hoses 7 59 Check Fuel Level 7 55 Check Hoses and Lines 7 48 Che...

Page 272: ... 3 OPTIONAL ATTACHMENT 13 1 Object Handling S 22 Opening Upper Front Window ZX26U 5A Cab equipped machine 1 14 Operate Only from Operator s Seat S 8 Operate with Caution S 20 Operating Backhoe 5 10 Operating in Water or Mud 4 11 Overheat Indicator 1 7 P Park Machine Safely S 24 Parking the Machine 4 13 Parking the Machine on Slopes 4 13 Part Name and Function 1 10 Periodic Replacement of Parts 7 1...

Page 273: ...Storing the Machine 10 1 Support Machine Properly S 28 Swing Bearing 7 25 Swing Internal Gear 7 26 Swing Post and Others 7 22 Switch Panel 1 5 T TRANSPORTING 6 1 TROUBLESHOOTING 11 1 Tightening and Retightening Torque of Nuts and Bolts 7 84 Towing Machine 4 10 Transmission 7 31 Transport Safely S 25 Transporting by Road 6 1 Travel Levers ZX17U 5A 4 1 Travel Levers and Pedals ZX26U 5A 4 3 Travel Mo...

Page 274: ...INDEX 14 4 MEMO ...

Page 275: ...Provisions The machine fulfills all relevant provisions of the following directives and their amendments 2014 30 EU EMC Directive 2006 42 EC Machinery Directive 2000 14 EC Outdoor Noise Emissions Directive Notified body for 2000 14 EC Aboma bv Maxwellstraat 49A PO Box 141 NL 6710 BC Ede Country The Netherlands Conformity assessment procedure followed Annex VI The EC Declaration of Conformity inclu...

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Hitachi Zaxis 17U-5A, Operator'S Manual

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