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Hitachi LX50-7 Wheel Loader Service Manual .PDF
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Hitachi LX50-7 Wheel Loader Service Manual .PDF
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Description
Hitachi LX50-7 Wheel Loader Service Manual .PDF
Hitachi LX50-7 Wheel Loader Service repair Manual covers the following topics exhaustively:
INDEX_WM............................................................. 1
Introduction......................................................... 3
1. GENERAL INFOMATION................................................ 5
1-1. Common Items................................................ 7
Scope of Description and Usage of This Manual................ 9
Precautions in Inspection and Service........................ 12
General Precautions for Inspection and Service............... 14
General Precautions for Safety Operation..................... 15
Disassembly and Assembly..................................... 22
1-2. Specifications.............................................. 31
Outline Drawings/Specifications.............................. 33
Fuel, Water and Oil Selection and Capacities................. 34
Weight of Main Components.................................... 38
Check and Service List....................................... 39
2. CONSTRUCTION AND FUNCTION......................................... 41
2-0. Engine...................................................... 43
Engine....................................................... 45
Engine Mount................................................. 47
Air Cleaner.................................................. 48
Muffler...................................................... 49
Radiator..................................................... 50
Engine Control............................................... 52
Fuel System.................................................. 53
2-1. Electronical System......................................... 57
Meter Panel.................................................. 59
Electrical Components........................................ 60
Electrical Circuit........................................... 63
Main Circuit............................................. 63
Monitor Lamp Circuit..................................... 64
Gauge Circuit............................................ 66
Charge Circuit........................................... 67
Pre-heating Circuit...................................... 69
Start and Stop Circuit................................... 71
Traveling System Circuit................................. 73
Light Circuit............................................ 79
Horn Circuit............................................. 81
Auto-leveler Circuit..................................... 82
2-2. Power Train I............................................... 83
Power Train.................................................. 85
HST.......................................................... 88
HST Pump..................................................... 89
HST Motor....................................................100
HST Piping...................................................104
HST Control..................................................106
HST Circuit..................................................107
Reduction Gear Box...........................................108
2-3. Power Train II..............................................111
Propeller Shaft..............................................113
Axle.........................................................114
Differential Assembly........................................115
Final Assembly...............................................117
Wheel........................................................119
2-4. Brake System................................................121
Brake System.................................................123
How to Tow a Vehicle (in an Emergency).......................128
Axle Built-in Type Wet Disk Brake............................129
Master Cylinder..............................................130
2-5. Steering System.............................................133
Steering.....................................................135
Steering Piping..............................................136
Power Steering Assembly......................................137
Steering Cylinder............................................138
2-6. Frame.......................................................139
Frame........................................................141
Center Pin...................................................142
Suspension...................................................143
FRP Awning...................................................144
2-7. Hydraulic System............................................145
Main Piping..................................................147
Control Valve................................................149
Main Pump....................................................157
Oil Tank.....................................................156
Return Filter................................................158
Lift/Tilt Cylinder...........................................159
2-8. Working Equipment...........................................161
Shovel Linkage...............................................163
Auto-leveler.................................................168
Shovel Control...............................................169
3. OVERHAUL..........................................................171
3-0. Engine......................................................173
Removal of Engine............................................175
Installation of Engine.......................................183
Level Check and Addition of Oil in Engine Oil Pan............191
Adjustment of Engine Control.................................192
Removal of Radiator..........................................193
Installation of Radiator.....................................197
Adjustment of Radiator Position..............................202
Level Check and Addition of Coolant..........................203
Removal of Fuel Tank.........................................204
Installation of Fuel Tank....................................206
Level Check and Addition of Fuel.............................209
3-2. Powertrain I................................................211
Removal of HST Pump..........................................213
Installation of HST Pump.....................................217
Removal of HST Motor.........................................222
Installation of HST Motor....................................225
Removal of Reduction Gear....................................228
Installation of Reduction Gear...............................231
Oil Change of Reduction Gear.................................234
Disassembly of Reduction Gear................................235
Reassembly of Reduction Gear.................................239
Reduction Gear Service Data..................................245
3-3. Powertrain II...............................................247
Removal of Front Axle........................................249
Installation of Front Axle...................................251
Removal of Rear Axle.........................................253
Installation of Rear Axle....................................256
Axle Oil Change..............................................260
Disassembly of Axle..........................................262
Assembly of Axle.............................................270
Axle Service Data............................................281
Assembly and Adjustment of Axle..............................282
3-4. Brake System................................................285
Removal of Master Cylinder...................................287
Installation of Master Cylinder..............................290
Adjustment Standards of Brake Control........................293
Disassembly of Master Cylinder...............................294
Reassembly of Master Cylinder................................295
3-5. Steering....................................................297
Removal of Orbit-Roll........................................299
Installation of Orbit-Roll...................................301
Disassembly of Orbit-Roll....................................304
Assembly of Orbit-Roll.......................................309
Removal of Steering Cylinder.................................315
Installation of Steering Cylinder............................318
3-7. Hydraulic System............................................321
Removal of Control Valve.....................................323
Installation of Control Valve................................326
Disassembly of Control Valve.................................329
Assembly of Control Valve....................................335
Removal of Main Pump.........................................343
Installation of Main Pump....................................345
Removal of Hydraulic Fluid Tank..............................347
Installation of Hydraulic Fluid Tank.........................350
Level Check and Addition of Fluid in Hydraulic Fluid Tank....353
Disassembly of Cylinder......................................354
Assembly of Cylinder.........................................357
Service Standards of Cylinders...............................361
4. TROUBLESHOOTING / DIAGNOSIS.......................................363
4-0. Engine......................................................365
4-2. Powertrain 1................................................371
4-3. Powertrain 2................................................389
4-4. Brake System................................................395
4-5. Steering System.............................................401
4-7. Hydraulic System............................................405
SERVICE MANUAL REVISION REQUEST FORM.................................425
SCREENSHOTS FROM THE MANUAL:
