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Maintenance

About Maintenance

This chapter provides descriptions of the main
inspection and maintenance operations for the
LM331 electrical system.
For information on daily checks, maintenance
and handling of the machine, please refer to
the separate LM331 Owner's Operating
Manual and Parts Catalog.
For details on handling the battery, please refer
to the separate Battery Instruction Manual.

Specifications

Electrical Part Layout

C

H

E

F

K6

K8 K3

K4 K9

3

M1

S2

T3

S4

SNS2

SNS1

7

S3

9

1

6

6

4

S1

BZ1

T1

8

D1

D2

2

M3

M2

S5

5

K5

T2

K1

K7 K2

erq4ky-015

Electrical Part Layout_001

LM331

Electrical system

Page 5-2

Maintenance

Summary of Contents for LM331

Page 1: ...3 Unit Surround Trim Mower Service Manual Serial No LM331 10001 Ver 1 0...

Page 2: ...ine Baroness parts or parts designated by Kyoeisha Note that the Baroness product warranty may not apply to defects caused by the use of parts from other companies Warning Symbols This manual uses the...

Page 3: ...enance Page 5 2 Specifications Page 5 2 Electrical components Page 5 5 General inspection and repair Page 5 23 Special Tool Page 5 29 Measurement Page 5 29 Adjustment Page 5 31 Main body Page 6 1 Main...

Page 4: ...LM331 Contents...

Page 5: ...Page 1 2 Training Page 1 2 Preparation Page 1 2 Operation Page 1 3 Maintenance and storage Page 1 4 Safety Signs and Instruction Signs Page 1 5 About Safety Signs and Instruction Signs Page 1 5 Safet...

Page 6: ...opes Incorrect hitching and load distribution 1 2 3 1 2 Never allow children or people unfamiliar with these instructions to use or service the machine Local regulations may restrict the age of the op...

Page 7: ...for humps and hollows and other hidden hazards 2 3 4 5 6 7 8 9 1 2 3 4 1 2 3 4 Never operate across the face of the slope unless the machine is designed for this purpose Never drive the machine on a...

Page 8: ...ly when absolutely necessary Do not wear the seat belt when folded down There is no rollover protection when a folding ROPS is in the down position 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Maintenanc...

Page 9: ...r reels to rotate Keep hands and feet away from moving parts If possible do not make adjustments with the engine running Charge batteries in an open well ventilated area away from spark and flames Unp...

Page 10: ...LM331 Safety Page 1 6 Safety Signs and Instruction Signs...

Page 11: ...Recycle and Waste Disposal Page 2 2 About Recycle Page 2 2 About the Waste disposal Page 2 2 Disposal LM331 Disposal Page 2 1...

Page 12: ...conomical use of resources It may be required by local laws About the Waste disposal Make sure that waste generated when servicing or repairing the machine is disposed of in accordance with local regu...

Page 13: ...ues Page 3 5 Standard tightening torques Page 3 5 Principal tightening torques Page 3 8 Jacking up the machine Page 3 9 About the Jacking up the machine Page 3 9 Jack up Points Page 3 9 Lifting Points...

Page 14: ...9 7 32 0 21875 5 556 23 32 0 71875 18 256 15 64 0 234375 5 953 47 64 0 734375 18 653 1 4 0 2500 6 350 3 4 0 7500 19 050 17 64 0 265625 6 747 49 64 0 765625 19 447 9 32 0 28125 7 144 25 32 0 78125 19 8...

Page 15: ...bic Meters Cubic Centimeters m3 m3 cm3 0 7646 0 02832 16 39 Weight Tons Short Pounds Ounces Avdp sh tn lb oz Metric Tons Kilograms Grams ton kg g 0 9078 0 4536 28 3495 Pressure Pounds Sq In Pounds Sq...

Page 16: ...4 0 08 in from its fully pressed state Pullback amount from the condition that the contact point of the parking brake switch is pressed to the maximum extent when the parking brake is released Traveli...

Page 17: ...efore sufficient tightening cannot be applied If screw is wet by water or oil do not tighten it with normal tightening torque If the screw is wet the torque coefficient will get smaller and it may res...

Page 18: ...00 8 851 00 M30 1 340 14 628 78 11 860 34 Note The same values are applied to fine screw thread Hydraulic hose The tightening torques for union joints and union adaptors with parallel pipe threads G P...

Page 19: ...to tighten an adjustable joint to the torque appropriate to its size Nominal diameter of thread Tightening torque N m kgf cm lb in 1 4 34 32 49 03 350 500 309 79 442 55 3 8 68 65 78 45 700 800 619 57...

Page 20: ...5 M24 180 200 1835 46 2039 40 1593 18 1770 20 Wheel K0011120302 BOLT HT P1 5 M12 30 67 85 683 20 866 75 593 02 752 34 Steering shaft housing K0010100402 BOLT HT M10 40 45 76 458 87 774 97 398 30 672...

Page 21: ...to do so may cause the machine to move or fall resulting in injury or death Use the jack up points identified in this manual when jacking up the machine Only place a jack under the jack up points spec...

Page 22: ...Front left frame b5geiy 006 Lifting Points_003 Greasing About Greasing Since there may be adhesion or damage due to lack of grease on moving parts they must be greased Add urea based No 2 grease in ac...

Page 23: ...lever 1 8 Traveling pedal shaft fulcrum 1 9 Traveling pedal relay lever 1 10 Front wheel brake lever 2 11 Mower lift cam lever 1 12 Mower coupling 2 Lift arm fulcrum Mower unit 1 There is one greasing...

Page 24: ...3 Greasing Points_006 Rear wheel housing 8bq62b 274 Greasing Points_007 3 4 5 Tension lever 8bq62b 275 Greasing Points_008 Neutral cam lever 8bq62b 276 Greasing Points_009 Traveling pedal shaft fulcru...

Page 25: ...ower lift cam lever 8bq62b 332 Greasing Points_014 10 11 Mower coupling Mower unit 2 and 3 There is one greasing point each on the couplings connecting the mower units 8bq62b 347 Greasing Points_015 M...

Page 26: ...LM331 Maintenance standards and maintenance Page 3 14 Mower Unit Layout...

Page 27: ...Page 4 15 Hydraulic circuit flow Page 4 16 Traveling circuit Page 4 16 Raise lower circuit Page 4 20 Steering circuit Page 4 22 Reel Rotation Circuit Page 4 24 Special Tool Page 4 26 List of Special T...

Page 28: ...s Operating Manual and Parts Catalog In order to maintain the integrity of the hydraulic device it cannot be disassembled and repaired For those parts that must be repaired by the manufacturer the di...

Page 29: ...0BS4S Displacement 195 0 cm3 rev 11 90 in3 rev Reel motor CASAPPA gear motor Gear motor PLM20 16 Displacement 16 9 cm3 rev 1 03 in3 rev Steering control unit EATON Orbitrol with VD5XMED Displacement 5...

Page 30: ...order to directly drive the wheel This is located at the front left and right tires Piston pump This converts the mechanical energy of the engine to fluid energy by using the reciprocating motion of t...

Page 31: ...eat Slow return valve This valve controls the flow by changing the size of the aperture in the hydraulic circuit and control the speed of the actuator hydraulic cylinder Stack valve This is composed o...

Page 32: ...ing 3WD Forward Traveling_001 shows the flow of oil shows flow of supply oil of the rear wheel motor The flow of oil shows that for 3WD forward traveling shows the port name 1 Piston pump 4 Wheel moto...

Page 33: ...l of the rear wheel motor Oil flows in the direction of the arrow between the rear wheel motor and the 2WD 3WD changeover valve The figure above shows the oil flow for 2WD forward traveling shows the...

Page 34: ...nit with Power Steering Turning to Left_001 shows the flow of oil The flow of oil shows that for raising the mower unit turning the power steering to left shows the port name 1 Piston pump 4 Mower up...

Page 35: ...tting with Mower Unit_001 shows the flow of oil The figure above shows the oil flow when cutting with the mower unit shows the port name 1 Piston pump 4 Left reel motor 7 Hydraulic tank 2 Orbitrol 5 R...

Page 36: ...hose is more sensitive to external conditions than other components check it frequently for damage deterioration or the like of When replacing the hydraulic hose check that the hose is straight not tw...

Page 37: ...ther tightening of 3 4 to one turn will cause the sleeve to bite into the tube w7s31b 007 Bite type tube fitting_007 Loosen the nut and check that the sleeve end is a few mm apart from the tube end an...

Page 38: ..._001 Check to see if the O ring is properly fitted to the groove of the main body Check to see that the thread part seat surface of O ring port and O ring are free from flaws or foreign matter Before...

Page 39: ...m that position in the loosening direction to the setting position 2 3 After fitting the opposite screw tighten the lock nut while holding the main body with a spanner etc to ensure that the setting p...

Page 40: ...ay attention to the following precautions when you use the sealing tape Slightly pull the sealing tape as tight as you can clearly see the thread mark on the tape while you wrap it and overlap a half...

Page 41: ...n lower the mower units Then stop the engine and remove the key To depressurize the hydraulic circuit set the traveling pedal and all the drives of the mower units to the neutral position To depressur...

Page 42: ...top valve Rear mower Stack valve RV4 13 7MPa 1 6 2 5 Rear Steering cylinder G P T RV4 2WD 3WD changeover valve Check valve Oil cooler P1 RV1 RV1 P2 S1 S2 B1 B3 T B2 A B A B B R A P Normal rotation P3...

Page 43: ...lve RV4 13 7MPa 1 6 2 5 Rear Steering cylinder G P T RV4 2WD 3WD changeover valve Check valve Oil cooler P1 RV1 RV1 P2 S1 S2 B1 B3 T B2 A B A B B R A P Normal rotation P3 RV3 P4 P2 Hydraulic oil filte...

Page 44: ...Stack valve RV4 13 7MPa 1 6 2 5 Rear Steering cylinder G P T RV4 2WD 3WD changeover valve Check valve Oil cooler P1 RV1 RV1 P2 S1 S2 B1 B3 T B2 A B A B B R A P Normal rotation P3 RV3 P4 P2 Hydraulic...

Page 45: ...lve RV4 13 7MPa 1 6 2 5 Rear Steering cylinder G P T RV4 2WD 3WD changeover valve Check valve Oil cooler P1 RV1 RV1 P2 S1 S2 B1 B3 T B2 A B A B B R A P Normal rotation P3 RV3 P4 P2 Hydraulic oil filte...

Page 46: ...Rear mower Stack valve RV4 13 7MPa 1 6 2 5 Rear Steering cylinder G P T RV4 2WD 3WD changeover valve Check valve Oil cooler P1 RV1 RV1 P2 S1 S2 B1 B3 T B2 A B A B B R A P Normal rotation P3 RV3 P4 P2...

Page 47: ...Rear wheel motor 158cm 3 rev Left mower Slow return valve Stop valve Rear mower Stack valve RV4 13 7MPa 1 6 2 5 Rear Steering cylinder G P T RV4 2WD 3WD changeover valve Check valve Oil cooler P1 RV1...

Page 48: ...ear mower Stack valve RV4 13 7MPa 1 6 2 5 Rear Steering cylinder G P T RV4 2WD 3WD changeover valve Check valve Oil cooler P1 RV1 RV1 P2 S1 S2 B1 B3 T B2 A B A B B R A P Normal rotation P3 RV3 P4 P2 H...

Page 49: ...alve RV4 13 7MPa 1 6 2 5 Rear Steering cylinder G P T RV4 2WD 3WD changeover valve Check valve Oil cooler P1 RV1 RV1 P2 S1 S2 B1 B3 T B2 A B A B B R A P Normal rotation P3 RV3 P4 P2 Hydraulic oil filt...

Page 50: ...Rear mower Stack valve RV4 13 7MPa 1 6 2 5 Rear Steering cylinder G P T RV4 2WD 3WD changeover valve Check valve Oil cooler P1 RV1 RV1 P2 S1 S2 B1 B3 T B2 A B A B B R A P Normal rotation P3 RV3 P4 P2...

Page 51: ...lve RV4 13 7MPa 1 6 2 5 Rear Steering cylinder G P T RV4 2WD 3WD changeover valve Check valve Oil cooler P1 RV1 RV1 P2 S1 S2 B1 B3 T B2 A B A B B R A P Normal rotation P3 RV3 P4 P2 Hydraulic oil filte...

Page 52: ...sure measurements vasdfi 004 K4701000020 Pressure For the range of 0 15 MPa For the range of 0 2 175 60 psi For the range of 0 152 96 kgf cm2 Primarily used for measuring the pressure of low pressure...

Page 53: ...oint for pressure pipes Gauge valve vasdfi 016 K4701000060 Used to temporarily shut off the fluid to be measured during maintenance inspection or repair etc of the pressure gauge Female connector 1015...

Page 54: ...042 Y Used as an adapter for the T joint during pressure measurements Adapter 1013 9 q9c6v6 008 K3000090002 Y Two pieces of them are used as adapters for the T joint during pressure measurements WP280...

Page 55: ...002 K3008000482 Y Used as a plug when the hydraulic hose is removed Screw cap male PF1 8 q9c6v6 001 K3008000532 Y Used as a plug when the hydraulic hose is removed Screw cap female PF1 8 q9c6v6 002 K...

Page 56: ...Used as an adapter for connecting to branched joints during pressure measurements Branched joint 1 2 q9c6v6 049 K3090000332 Used for branches into joints off the flow path for oil pressure measuremen...

Page 57: ...Branched joint 1 4 q9c6v6 049 K3090000312 Used for branches into joints off the flow path for oil pressure measurements Hydraulic system LM331 Hydraulic system Page 4 31 Special Tool...

Page 58: ...ent Contamination may lead to clogging or breakage of the hydraulic circuit 1 Review the measuring method before starting measurement Before measurement check for poor adjustment clogging or breakage...

Page 59: ...lve Stop valve Rear gear motor Stack valve 1 6 2 5 Up down cylinder for rear Steering cylinder G P T 13 7MPa 2WD 3WD changeover valve In line check valve 0 6MPa 20 6MPa 10um 6 9MPa Oil cooler P1 P2 S1...

Page 60: ...013 6 to branched joint 3 8 1 2 g2hgdk 007 Forward Traveling 3WD _003 1 Branched joint 3 8 2 Adapter 1013 6 Apply the parking brake 1 1 2 2 Move the 2WD 3WD changeover lever to the 3WD side Remove the...

Page 61: ...e gauge valve of the hydraulic pressure measurement tool Start the engine and rev it up to the maximum rpm Release the parking brake It is normal if the pressure is 20 6 MPa 210 kgf cm2 2 988 psi when...

Page 62: ...ve Stop valve Rear gear motor Stack valve 1 6 2 5 Up down cylinder for rear Steering cylinder G P T 13 7MPa 2WD 3WD changeover valve In line check valve 0 6MPa 20 6MPa 10um 6 9MPa Oil cooler P1 P2 S1...

Page 63: ...hed joint 3 8 1 2 g2hgdk 007 Reverse Traveling 3WD _003 1 Branched joint 3 8 2 Adapter 1013 6 Apply the parking brake 1 1 2 2 Move the 2WD 3WD changeover lever to the 3WD side Remove the lower hydraul...

Page 64: ...er side Open the gauge valve of the hydraulic pressure measurement tool Start the engine and rev it up to the maximum rpm Release the parking brake It is normal if the pressure is 20 6 MPa 210 kgf cm2...

Page 65: ...turn valve Stop valve Rear gear motor Stack valve 1 6 2 5 Up down cylinder for rear Steering cylinder G P T 13 7MPa 2WD 3WD changeover valve In line check valve 0 6MPa 20 6MPa 10um 6 9MPa Oil cooler P...

Page 66: ...raulic pressure measurement port plug of the stack valve using an M6 hexagon wrench 1 2 dmxdti 022 Up Down Circuit Rise _003 1 Stack valve 2 Hydraulic pressure measurement port plug Install a 90 degre...

Page 67: ...alve 1 6 2 5 Up down cylinder for rear Steering cylinder G P T 13 7MPa 2WD 3WD changeover valve In line check valve 0 6MPa 20 6MPa 10um 6 9MPa Oil cooler P1 P2 S1 S2 B1 B3 T B2 A B A B B R A P Normal...

Page 68: ...Adapter 1013 6 Remove the steering cylinder shrinking side hydraulic hose 1 1 2 2 Install branched joint 1 4 between the removed shrinking side hydraulic hose and steering cylinder 1 2 g2hgdk 008 Stee...

Page 69: ...valve Rear gear motor Stack valve 1 6 2 5 Up down cylinder for rear Steering cylinder G P T 13 7MPa 2WD 3WD changeover valve In line check valve 0 6MPa 20 6MPa 10um 6 9MPa Oil cooler P1 P2 S1 S2 B1 B3...

Page 70: ...front cover Remove the hydraulic hose between the piston pump and the hydraulic oil filter from the branched elbow 1 1 2 2 3 4 Install branched joint 3 8 between the removed hydraulic hose and branche...

Page 71: ...valve Rear gear motor Stack valve 1 6 2 5 Up down cylinder for rear Steering cylinder G P T 13 7MPa 2WD 3WD changeover valve In line check valve 0 6MPa 20 6MPa 10um 6 9MPa Oil cooler P1 P2 S1 S2 B1 B3...

Page 72: ...ug of the stack valve using an M6 hexagon wrench 1 2 dmxdti 022 Reel Rotation Circuit_003 1 1 2 3 4 5 6 1 Stack valve 2 Hydraulic pressure measurement port plug Install a 90 degree elbow 1033 6 to the...

Page 73: ...of the mower unit is too fast the shock that the mower unit is subjected when it hits the stopper increases and may result in damage to the machine Follow the steps below to adjust the slow return va...

Page 74: ...LM331 Hydraulic system Page 4 48 Adjustment...

Page 75: ...ot Lamps Page 5 17 Delay Timer Page 5 18 Fuel Gauge Page 5 20 Water Temperature Gauge Page 5 20 Hour Meter Page 5 20 Starter Relay Page 5 21 Glow Lamp Timer Page 5 21 Fusible Link Page 5 22 Fuse Box P...

Page 76: ...e machine please refer to the separate LM331 Owner s Operating Manual and Parts Catalog For details on handling the battery please refer to the separate Battery Instruction Manual Specifications Elect...

Page 77: ...mower arm proximity switch and controls the rotation of the reel cutter It is located under the hood K5 Relay REEL Fwd Rev This is one of the relays that constitute the interlock system It operates in...

Page 78: ...right of the seat S2 Reel reverse switch The reel reverse switch uses a rocker switch It controls the reverse rotation of the stack valve for mower rotation according to switch operation It is located...

Page 79: ...nk functions as the main fuse for the entire electrical circuit and as the fuse for the charge circuit It is located under the hood and equipped with a specialized fuse 50 A cartridge 8 Fusible link 3...

Page 80: ...owering mower unit Proximity Switch Proximity switches detect that objects are nearby through non contact methods Proximity switch for traveling pedal neutral 1 2 lo2wbc 004 Proximity Switch_001 1 Pro...

Page 81: ...battery and a voltmeter to the connector terminal of the proximity switch NO Connect the battery to the connector terminal and the battery to the connector terminal Connect the voltmeter to the conne...

Page 82: ...brake switch is located in the brake pedal fulcrum under the hood and has two systems of circuits A B 2 1 3 67xzzh 022 Parking Brake Switch_001 1 Parking brake switch 2 Brake pedal 3 Connector A Rele...

Page 83: ...noid connectors The normal resistance between the connector terminals of the solenoid is about 25 Solenoid Specifications Voltage Resistance Holding current DC 12 V 25 0 48 A 1 2 Relay Relay MR5A411A1...

Page 84: ...Relay CA1aF 12V N 5 Relay CA1aF 12V N 5 is located under the hood behind the meter panel It is used in the interlock system associated with the reel rotation switch proximity switch reel cutter rotat...

Page 85: ...1 3 4 2 1 38jyg3 016 Inspection of Relay CA1aF 12V N 5 _003 Relay CA1 DC12V N Relay CA1 DC12V N is located under the hood behind the meter panel This is the interlock system associated with the reel r...

Page 86: ...nd 4 and no conduction between relay terminals 3 and 5 with the battery connected to relay terminals 1 and 2 2 5 4 3 1 1 3 4 2 5 38jyg3 013 Inspection of Relay CA1 DC12V N _003 1 2 3 4 Relay 5H276 412...

Page 87: ...s 1 and 2 is about 101 3 5 1 4 2 3 5 1 4 2 k814ai 001 Inspection of Relay 5H276 41251 _001 1 2 It is normal that there is conduction between relay terminals 3 and 4 3 5 1 4 2 3 5 1 4 2 k814ai 002 Insp...

Page 88: ...2 3 5 1 4 2 k814ai 003 Inspection of Relay 5H276 41251 _003 4 Relay 5H632 42511 Relay 5H632 42511 is located under the hood behind the meter panel This allows the fuel solenoid to be pulled when cont...

Page 89: ...ion is when there is conduction between relay terminals B and G with battery voltage acting on relay terminals e and g B G g e g B e G k814ai 006 Inspection of Relay 5H632 42511 _003 Headlights The he...

Page 90: ...30 50 19 B Key Switch_001 2 Key Position and Device Operation ON Run The diesel engine on the machine runs or stops based on the fuel supply When the key is set to the OFF position the engine stop sol...

Page 91: ...ith the key at START position Only if the specified activation conditions are satisfied the starter motor can be activated OFF ON GLOW START pff35r 001 START_001 Pilot Lamps Status of charge of the en...

Page 92: ...hen the engine starts and engine oil pressure is generated properly It is connected to an oil pressure switch located in the engine block beside the oil element and lights up if the oil pressure drops...

Page 93: ...2 Connect switch line 1 to coupler terminal 3 Connect coupler terminal 4 to the battery Connect lamp line 2 to the battery Connect switch line 2 to the battery 1 2 1 2 3 4 5 6 When the switch is turn...

Page 94: ...e machine and indicates the water temperature The water temperature sensor displays the temperature upon converting the resistance value which changes according to the temperature Y 2 4 R W 3 5 B 1 ig...

Page 95: ...and controls illumination of the thermo start lamp 1 2afqm4 002 Glow Lamp Timer_001 1 Glow lamp timer When the ignition key is set and held to the GLOW position the thermo start lamp turns on for 5 s...

Page 96: ...g The fuse box includes spare fuses and tools 1 pkm25s 015 Fuse Box_001 1 Fuse box The machine uses a mini fuse for automobiles Replace an old fuse with a new fuse of the specified capacity A B C D E...

Page 97: ...s exceeded The thermo switch is located on the flange of the connector at the top of the radiator hose 1 gypyy9 015 Water Temperature Buzzer_001 1 Thermo switch General inspection and repair Battery H...

Page 98: ...ntinue to use it Doing so could result in damage to the battery or electrolyte leaks Use extra care when handling the battery and if any problems are found replace the battery with a new one Carry or...

Page 99: ...burst Inspection of the mounting bracket Ensure that the battery is firmly secured by the mounting bracket 1 2 3 If it is not tighten the nuts securing the battery until it is firmly secured If the ba...

Page 100: ...mage to the battery leakage of the electrolyte fire or explosion Do not modify the battery terminals Ensure that the vent plug or vent hole on the side of the battery is not covered by the connection...

Page 101: ...gative terminal 3 2 1 4jes59 011 Replacement of Battery_003 1 Cable 2 Terminal 3 Terminal Battery Charge When charging the battery with the battery charger follow the correct steps according to the ha...

Page 102: ...e battery on the vehicle and wait for 30 minutes after charging Failure to observe these precautions could cause a fire or explosion Caution The temperature of the electrolyte must be 45 degrees C or...

Page 103: ...50 1 16 75 25 1 12 100 0 Measurement of specific weight of 12V battery Check all the cells after charge Replace the battery when the specific weight is 1 225 or less or gap of that between each cell i...

Page 104: ...seat Turn the reel rotation switch ON without sitting on the driver s seat To do work reel rotation An operator sits on the seat Turn ON the reel rotation switch Lower all mower units mower unit 2 pr...

Page 105: ...ng operates in coordination with the traveling pedal neutral detection proximity switch attached to the frame and traveling relay lever Proximity Switch For Reel Cutter Rotation Stop The proximity swi...

Page 106: ...he traveling pedal is in neutral Adjust the proximity switch installed on the sensor mounting arm by loosening the bolt and moving it parallel In neutral condition make sure that the proximity switch...

Page 107: ...and adjustment nut B at a position that is 1 2 mm 0 04 0 08 in back from the state where the switch contact point is pressed to the maximum extent when the parking brake is released 1 A 2 3 67xzzh 02...

Page 108: ...LM331 Electrical system Page 5 34 Adjustment...

Page 109: ...Page 6 5 Adjusting the Neutral Position of the Piston Pump Page 6 6 Adjustment of Traveling Relay Lever Page 6 7 Adjustment of Traveling Pedal Page 6 8 Adjustment of Throttle Wire Page 6 9 Adjustment...

Page 110: ...Parts Catalog Specifications Tire Pneumatic Pressure kPa kgf cm2 psi lb in Front wheel 140 1 4 20 30 Rear wheel 140 1 4 20 30 Adjusted Value mm in Hydraulic pump drive belt Spring compression distanc...

Page 111: ...e clearance adjustment hole on the rear of the backing plate 2 1 6vnrkf 001 Adjustment of Drum Brake_001 1 Backing plate 2 Rubber plug 1 2 1 Insert a flat blade screwdriver or similar tool into the cl...

Page 112: ...ine will be unable to stop and is extremely dangerous If there are cracks damage or other defects replace it immediately Adjust the brake wire if the brakes become less effective Important Adjust the...

Page 113: ...Danger Make sure that the brake is effective on slopes and that it is not applied any longer when you release it Adjust the parking brake system whenever there is any abnormality Adjust the parking br...

Page 114: ...Make sure that no tires get contact with the jack stand Open the hood Make sure that the length of the spring of the lever adjuster is 53 0 mm 2 09 in Loosen the lock nut as necessary to make adjustme...

Page 115: ...Stop the engine Open the hood Remove the right side floor panel Follow the steps below to adjust the traveling relay lever Adjust the push pull cable connecting the trunnion lever and traveling relay...

Page 116: ...move the right side floor panel Follow the steps below to adjust the traveling rod If the traveling pedal base plate is not facing directly up when the traveling relay lever is facing directly up the...

Page 117: ...ides engine side and operation panel side and loosen the throttle wire 2 1 3 4 6v3fj3 017 Adjustment of Throttle Wire_001 1 Throttle lever operation panel side 2 Adjustment bolt operation panel side 3...

Page 118: ...ottle lever to the low speed position and adjust the stopper bolt so that the engine speed is at 1 450 rpm and secure with the lock nut 2 1 3 6v3fj3 018 Adjustment of Throttle Wire_004 2 1 2 3 4 1 Thr...

Page 119: ...separate Engine Operating Manual Press the middle of the belt with your finger to check the belt tension If the belt is too slack loosen bolts A and B that affix the alternator then move the alternat...

Page 120: ...Bolt 3 Spring washer 4 Washer Remove the gear motor and packing 2 1 aqfz1n 031 Removal of LS Unit_002 1 2 3 4 5 6 1 Gear motor 2 Packing Removal of mower units 2 and 3 Remove the retaining snap pin Re...

Page 121: ...nd feet Raise the mower unit Remove the lift arm spring Lower the mower units Stop the engine 3 1 2 3 4 Remove the bolt spring washer and washer used to install the gear motor 1 2 3 4 aqfz1n 026 Remov...

Page 122: ...2 3 1 Retaining snap pin 2 Round head pin 3 Collar with hole 4 Brass washer 5 Washer Installation of Mower Unit Danger Danger Both the reel cutter cutting cylinder and the bed knife bottom blade are e...

Page 123: ...er Check the remaining amount at the inspection Replace if it is too small Brake Drum Removal Remove the tires Remove the bolts and then remove the cover 1 2 gw2sl9 001 Brake Drum Removal_001 1 Bolt 2...

Page 124: ...Brake The brake shoe can be replaced while the brake is installed to the machine 1 a1y6z3 001 Disassembling and Assembling the Brake_001 1 Brake shoe Remove the upper and lower springs Note The sizes...

Page 125: ...adjust the width of the brake shoe 4 5 6 Do not insert the key to the motor shaft and tentatively assemble the drum 2 2 1 a1y6z3 005 Disassembling and Assembling the Brake_006 1 Adjustment screw 2 Bra...

Page 126: ...replacement drive belts For installation of the drive belts reverse the removal steps Adjust the drive belt tension Hydraulic Pump Drive Belt Page 6 11 Bearing Replacement of the Rear Wheel Arm Axis B...

Page 127: ...Bearing_003 1 Steering cylinder Follow the steps below to remove the rear wheel arm Remove the rear wheel arm upper bolt and spring washer 2 3 4 5 1 Remove the steering shaft cap Remove the rear whee...

Page 128: ...er diameter and inner diameter dimensions Assemble the parts while checking the secured side The secured side of the shaft washer is the bearing inner diameter side and the secured side of the housing...

Page 129: ...g_010 1 Rear wheel arm 2 Steering shaft housing Support the rear wheel arm from underneath and install the steering shaft cap 12 13 14 Install the spring washer and tighten the bolt 2 4 3 1 26todo 009...

Page 130: ...her B Remove the pin Remove the lever adjuster 1 2 5 9 7 6 4 3 8 2w7sr8 001 Replacement of the Tension Pulley Bearing_001 1 Lock nut 2 Nut 3 Washer A 4 Spring 5 Collar 6 Cotter pin 7 Washer B 8 Pin 9...

Page 131: ...Pump Drive Shaft Bearing Wear of bearings due to usage frequency or damage to bearings or other parts caused by water penetration may prevent smooth rotation of the hydraulic pump drive shaft Inspect...

Page 132: ...olts washers spring washers and nuts Remove the pump shaft housing 4 5 6 4 5 6 1 2 Note If the pump shaft housing cannot be removed evenly screw in M8 bolts into the M8 screw holes 2 locations and pus...

Page 133: ...aring_007 1 Pump shaft 2 Plastic hammer 3 Bearing 4 Pump shaft housing 2 3 Remove the stop ring bearing part from the pump mounted side of the pump shaft housing 1 2 9ah6c6 008 Replacement of the Hydr...

Page 134: ...d bearing mounting shaft Remove the lever adjustment bracket lock nut Loosen the nut to the threaded end of the lever adjustment bracket 1 3 2 4 ais325 001 Replacement of Bearing of Trunnion Lever_001...

Page 135: ...ment bearing For installation of the trunnion lever reverse the removal steps Adjust the neutral position of the piston pump 4 1 2 3 4 5 6 7 Mower Arm Due to frequent use or damage during use or trans...

Page 136: ...LM331 Main body Page 6 28 Inspection and repair of each section...

Page 137: ...Engine Related Page 7 2 Traveling Related Page 7 5 Relating to Steering Page 7 6 Relating to Operating Machine and Mower Unit Page 7 7 Troubleshooting LM331 Troubleshooting Page 7 1...

Page 138: ...ient battery capacity or loose terminals Electrical System General Inspections Repairs Battery Faulty ignition key switch Electrical System Electrical Components Key Switch Faulty alternator Electrica...

Page 139: ...anual The engine starts then immediately stops The interlock system was activated left the seat without applying the parking brake Electrical System Measurements Interlock System Clogged air cleaner e...

Page 140: ...erating Manual Faulty thermostat Engine Maintenance Manual Faulty thermometer switch Engine Maintenance Manual Charge lamp does not turn off Faulty alternator wire Inspect and repair the wire Faulty a...

Page 141: ...case where the aforementioned causes do not exist Malfunction of linkage etc from the traveling pedal to the pump Main body Adjustment Traveling Adjustment of traveling rod The unload valve is open T...

Page 142: ...peration is heavy Engine rpm is slow This machine s Owner s Operating Manual Tire pressure is low This machine s Owner s Operating Manual Lack of grease on the steering shaft This machine s Owner s Op...

Page 143: ...easurement Up Down circuit Malfunction of stack valve Repair and replacement of the stack valve The reel cutter does not rotate Malfunction of the gear motor Hydraulic system Measurement Reel rotation...

Page 144: ...rement Reel rotation circuit Repair and replacement of the gear motor Malfunction of stack valve Hydraulic system Measurement Reel rotation circuit electrical system Electrical Components Stack valve...

Page 145: ...lic Circuit Diagram Page 8 9 Electrical Circuit Page 8 10 Used Symbols Page 8 11 Electrical Circuit Diagram Parts List Page 8 14 Machine Wiring Diagram Page 8 16 Electric Wiring Diagram Page 8 18 List...

Page 146: ...er Brake Front two wheel drum mechanical type Tire Size Front wheel 20 x 12 00 10 4P Rear wheel 20 x 8 00 10 4P Pneumatic pressure Front wheel 20 30 psi 140 kPa 1 4 kgf cm2 Rear wheel 20 30 psi 140 kP...

Page 147: ...sel 6 61 U S gals Diesel 25 0 dm3 25 0 L Hydraulic tank Shell Tellus S2M46 or equivalent ISO VG46 6 87 U S gals 26 0 cm3 26 0 L The factory default maximum engine rpm is 2 800 rpm Reference LM331 Refe...

Page 148: ...vacuator valve to remove dust Open valve every week or daily in dusty conditions Check hydraulic oil level Refer to Inspection of Hydraulic Oil Check hydraulic hoses condition Moving part Check tire p...

Page 149: ...defacement and joint looseness 50 hours first check every 100 hours thereafter Check looseness of wheel mounting bolt 50 hours first check every 100 hours thereafter Grease and Lubricate all moving p...

Page 150: ...first change every 500 hours thereafter Replace hydraulic oil filter 100 hours first change every 500 hours thereafter 4 Check exterior of battery Check every 100 hours or every month whichever comes...

Page 151: ...s and clamp bands Check every 200 hours or 6 months whichever comes earlier Check hydraulic hoses condition Fixed part Check every 200 hours or every year whichever comes earlier 2 3 Replace fuel filt...

Page 152: ...r this service The items above 2 marked are registered as emission related critical parts by KUBOTA in the U S EPA nonroad emission regulation As the engine owner you are responsible for the performan...

Page 153: ...ve Stop valve Rear gear motor Stack valve 1 6 2 5 Up down cylinder for rear Steering cylinder G P T 13 7MPa 2WD 3WD changeover valve In line check valve 0 6MPa 20 6MPa 10um 6 9MPa Oil cooler P1 P2 S1...

Page 154: ...k unit UNIT E M3 Water temperature gauge 61 R L GND Proximity Switch 22 R W 1G386 60241 Diode unit G G W K7 Starter relay K1 2 Mower stop K3 2 Neutral detection P brake SW Glow Hydraulic Charge Pilot...

Page 155: ...1 is shown vgmkvc 030 Switch symbol or relay contact point symbol a contact point type NO Switch that is conductive during operation or when the relay coil is energized To show this as a relay contact...

Page 156: ...cted item to be selected during operation or when the relay coil is energized To show this as a relay contact point the corresponding relay coil symbol e g K1 1 is shown vgmkvc 034 Sol solenoid symbol...

Page 157: ...Connector symbol vgmkvc 037 LED symbol vgmkvc 038 Lamp symbol vgmkvc 039 Buzzer symbol vgmkvc 040 Reference LM331 Reference Page 8 13 Electrical Circuit...

Page 158: ...auge Fuel gauge Water temperature gauge Water temperature gauge Proximity switch NO black Proximity switch for traveling pedal neutral Proximity switch NO black Proximity switch for reel cutter rotati...

Page 159: ...Reference LM331 Reference Page 8 15 Electrical Circuit...

Page 160: ...op switch Tank unit A C Rotation Stop B To rear section of the vehicle E 92 B AVS3 Frame M8 Pedal neutral detection SNS1 SNS2 Vcc Vout GND 22 25 RW AVS0 5 58 RG AVS0 5 E 85 B AVS0 5 4 W AVS3 35 RG AVS...

Page 161: ...8 a c d e f b a c d e f b K1 K3 K7 K5 K4 K2 TIMER Glow lamp T3 Normal rotation Reverse rotation B A C Left section of the machine Relay mounting plate Hour meter M1 Lapping SW reverse rotation S2 12 R...

Page 162: ...39 71 91 connected with Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground 22 connected with connected with 22 connected with...

Page 163: ...OTOR SHAFT 3 Delay timer K3683000010 TIMER OFF DELAY 0 9S 1 Relay PEDAL NEUTRAL K3681000070 RELAY MR5A411A1K 1 Relay REEL STOP K3681000070 RELAY MR5A411A1K 1 Relay FUEL SOL HOLD K3681000060 RELAY CALA...

Page 164: ...0544Z0 WIRE THROTTLE 975 1 Brake wire LH K1120175010 WIRE BRAKE 1750 1 Brake wire RH K1120100000 WIRE BRAKE 1000 1 Brake shoe for left wheel P741 8006 01 SHOE BRAKE 1 Brake shoe for left wheel P741 80...

Page 165: ...Head Office 1 26 Miyuki cho Toyokawa Aichi Pref 442 8530 Japan Tel 0533 84 1390 Fax 0533 89 3623 LM331 SM GBZ 18H 00 S K C...

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