Hitachi ZX 330-5G 330LC-5G 350H-5G 350LCH-5G 350K-5G 350LCK-5G Hydraulic Excavator Service Manual
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PAGES:498
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Hitachi ZX 330-5G 330LC-5G 350H-5G 350LCH-5G 350K-5G 350LCK-5G Hydraulic Excavator Service Manual
To The Reader
This manual is written for an experienced technician to provide technical information needed to maintain and repair this machine.
- Be sure to thoroughly read this manual for correct product information and service procedures.
- If you have any questions or comments, at if you found any errors regarding the contents of this manual, please contact using “Service Manual Revision Request Form” at the end of this manual.
Additional References
Please refer to the other materials (operator’s manual, parts catalog, engine technical material and Hitachi training material etc.) in addition to this manual.
Manual Composition
This manual consists the Technical Manual, the Workshop Manual and the Engine Manual.
- Information included in the Technical Manual:
Technical information needed for redelivery and delivery, operation and activation of all devices and systems, operational performance tests, and troubleshooting procedures. - Information included in the Workshop Manual:
Technical information needed for maintenance and repair of the machine, tools and devices needed for maintenance and repair, maintenance standards, and removal / installation and assemble / disassemble procedures. - Information included in the Engine Manual:
Technical information needed for redelivery and delivery and maintenance and repair of the machine, operation and activation of all devices and systems, troubleshooting and assemble / disassemble procedures
TABLE OF CONTENTS:
Hitachi ZX 330-5G 330LC-5G 350H-5G 350LCH-5G 350K-5G 350LCK-5G Hydraulic Excavator Service Manual
WDDE-EN-00........................................................... 1
INTRODUCTION......................................................... 3
SYMBOL AND ABBREVIATION.............................................. 5
SAFETY............................................................... 7
SECTION AND GROUP CONTENTS........................................... 47
SECTION 1 GENERAL.................................................... 49
Group 1 Precautions for Disassembling and Assembling............. 51
Precautions for Disassembling and Assembling................. 51
Group 2 Tightening............................................... 57
Tightening Bolts and Nuts.................................... 57
Piping Joint................................................. 60
Group 3 Painting................................................. 65
Painting..................................................... 65
Group 4 Bleeding Air............................................. 67
Bleeding Air from Hydraulic Oil Tank......................... 67
Bleeding Air from Hydraulic System........................... 68
Bleeding Air from Fuel System................................ 69
Group 5 Pressure Release Procedure............................... 71
Hydraulic Circuit Pressure Release Procedure................. 71
Group 6 Preparation.............................................. 73
Preparation before Inspection and Maintenance................ 73
SECTION 2 MAINTENANCE STANDARD....................................... 77
Group 1 Upperstructure........................................... 79
Pump Device.................................................. 79
Swing Motor.................................................. 83
Group 2 Undercarriage............................................ 87
Travel Motor................................................. 87
Sprocket..................................................... 89
Front Idler.................................................. 91
Upper Roller................................................. 93
Lower Roller................................................. 94
Track........................................................ 95
Group 3 Front Attachment......................................... 99
Pin and Bushing.............................................. 99
Side Cutter..................................................101
Point........................................................101
Side Cutter..................................................102
Point........................................................102
Standard Dimensions for Arm and Bucket Connection............103
Standard Dimensions for Arm and Boom Connection..............104
Cylinder.....................................................105
SECTION 3 UPPERSTRUCTURE.............................................109
Group 1 Cab......................................................111
Removal and Installation of Cab..............................111
Dimensions of Cab Glass......................................127
Group 2 Counterweight............................................147
Removal and Installation of Counterweight....................147
Group 3 Main Frame...............................................151
Removal and Installation of Main Frame.......................151
Group 4 Engine...................................................157
Removal and Installation of Engine...........................157
Group 6 Hydraulic Oil Tank.......................................181
Removal and Installation of Hydraulic Oil Tank...............181
Group 7 Fuel Tank................................................189
Removal and Installation of Fuel Tank........................189
Group 8 Pump Device..............................................197
Removal and Installation of Pump Device......................197
Removal and Installation of Coupling.........................207
Disassembly of Pump Device...................................209
Assembly of Pump Device......................................212
Disassembly of Main Pump.....................................217
Assembly of Main Pump........................................222
Disassembly of Regulator.....................................231
Assembly of Regulator........................................233
Disassembly of Pilot Pump....................................235
Assembly of Pilot Pump.......................................237
Group 9 Control Valve............................................239
Disassembly of Housing.......................................253
Assembly of Housing..........................................255
Disassembly of Control Valve (4-Spool Side)..................257
Assembly of Control Valve (4-Spool Side).....................264
Disassembly of Control Valve (5-Spool Side)..................275
Assembly of Control Valve (5-Spool Side).....................282
Group 10 Swing Device............................................291
Removal and Installation of Swing Device.....................291
Disassembly of Swing Device..................................295
Assembly of Swing Device.....................................301
Disassembly of Swing Motor...................................307
Assembly of Swing Motor......................................310
Structure of Swing Parking Brake Switch Valve................313
Group 11 Pilot Valve.............................................315
Removal and Installation of Pilot Valve (Left)...............315
Removal and Installation of Pilot Valve (Right)..............321
Removal and Installation of Travel Pilot Valve...............329
Disassembly of Pilot Valves (Right and Left).................333
Assembly of Pilot Valves (Right and Left)....................336
Disassembly of Travel Pilot Valve............................339
Assembly of Travel Pilot Valve...............................343
Group 12 Solenoid Valve..........................................349
Removal and Installation of Pilot Shut-Off Solenoid Valve....349
Removal and Installation of 3-Spool Solenoid Valve Unit......353
Disassembly of Pilot Shut-Off Solenoid Valve.................357
Assembly of Pilot Shut-Off Solenoid Valve....................359
Structure of 3-Spool Solenoid Valve Unit.....................361
Group 13 Signal Control Valve....................................363
Removal and Installation of Signal Control Valve.............363
Structure of Signal Control Valve............................369
SECTION 4 UNDERCARRIAGE..............................................373
Group 1 Swing Bearing............................................375
Removal and Installation of Swing Bearing....................375
Disassembly of Swing Bearing.................................379
Assembly of Swing Bearing....................................382
Group 2 Travel Device............................................385
Removal and Installation of Travel Device....................385
Disassembly of Travel Device.................................389
Assembly of Travel Device....................................393
Disassembly of Travel Motor..................................401
Assembly of Travel Motor.....................................404
Disassembly of Brake Valve...................................409
Assembly of Brake Valve......................................411
Group 3 Center Joint.............................................415
Removal and Installation of Center Joint.....................415
Disassembly of Center Joint..................................419
Assembly of Center Joint.....................................421
Replacement of Body and Spindle..............................424
Group 4 Track Adjuster...........................................425
Removal and Installation of Track Adjuster...................425
Disassembly of Front Idler...................................429
Assembly of Front Idler......................................432
Group 5 Upper and Lower Rollers..................................437
Removal and Installation of Upper Roller.....................437
Removal and Installation of Lower Roller.....................441
Disassembly of Lower Roller..................................445
Assembly of Lower Roller.....................................447
Group 6 Track....................................................451
Removal and Installation of Track............................451
SECTION 5 FRONT ATTACHMENT...........................................459
Group 1 Front Attachment.........................................461
Removal and Installation of Front Attachment.................461
Group 2 Cylinder.................................................469
Removal and Installation of Boom Cylinder....................469
Removal and Installation of Arm Cylinder.....................473
Removal and Installation of Bucket Cylinder..................477
Disassembly of Boom, Arm, and Bucket Cylinders...............481
Assembly of Boom, Arm, and Bucket Cylinders..................485
Disassembly of Boom, Arm, and Bucket Cylinders...............489
Assembly of Boom, Arm, and Bucket Cylinders..................493
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