Hitachi ZX350LC-6 ZX350LCN-6 Hydraulic Excavator Technical Workshop Manual (WDDQ50-EN-01)
File Details:
Hitachi ZX350LC-6 ZX350LCN-6 Hydraulic Excavator Technical Workshop Manual (WDDQ50-EN-01)
- Manual Language:English
- Pages: 689
- Size: 18.4 MB
- Format:PDF
- Downloadable:Yes
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Description:
Hitachi ZX350LC-6 ZX350LCN-6 Hydraulic Excavator Technical Workshop Manual (WDDQ50-EN-01)
To The Reader
This manual is written for an experienced technician to provide technical information needed to maintain and repair this machine. The machine specification and description according to destination may be explained on this manual.
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 ZX350LC-6 ZX350LCN-6 Hydraulic Excavator Technical Workshop Manual (WDDQ50-EN-01)
WDDQ50-EN-01........................................................................... 1 CONTENTS........................................................................... 3 SECTION 1 GENERAL.............................................................. 3 SECTION 2 MAINTENANCE STANDARD................................................. 5 SECTION 3 UPPERSTRUCTURE....................................................... 7 SECTION 4 UNDERCARRIAGE........................................................ 9 SECTION 5 FRONT ATTACHMENT..................................................... 11 INTRODUCTION....................................................................... 13 To The Reader.................................................................. 13 Additional References.......................................................... 13 Manual Composition............................................................. 13 Page Number.................................................................... 13 Trademark...................................................................... 13 Safety Alert Symbol and Headline Notations..................................... 14 Units Used..................................................................... 14 SYMBOL AND ABBREVIATION............................................................ 15 SAFETY............................................................................. 17 Recognize Safety Information................................................... 17 Understand Signal Words........................................................ 17 Follow Safety Instructions..................................................... 18 Prepare for Emergencies........................................................ 19 Wear Protective Clothing....................................................... 19 Protect Against Noise.......................................................... 20 Inspect Machine................................................................ 20 General Precautions for the Cab................................................ 21 Use Handholds and Steps........................................................ 22 Adjust the Operator's Seat..................................................... 22 Ensure Safety Before Rising from or Leaving Operator’s Seat.................... 23 Fasten Your Seat Belt.......................................................... 23 Move and Operate Machine Safely................................................ 24 Operate Only from Operator's Seat.............................................. 24 Jump Starting.................................................................. 25 Keep Riders off Machine........................................................ 25 Precautions for Operations..................................................... 26 Investigate Job Site Beforehand................................................ 27 Install OPG Guard.............................................................. 28 Restriction of Attachment Installation......................................... 28 Provide Signals for Jobs Involving Multiple Machines........................... 29 Confirm Direction of Machine to Be Driven...................................... 29 Drive Machine Safely........................................................... 30 Avoid Injury from Rollaway Accidents........................................... 32 Avoid Injury from Back-Over and Swing Accidents................................ 33 Keep People Clear from Working Area............................................ 34 Never Position the Bucket Over Anyone.......................................... 34 Avoid Undercutting............................................................. 35 Avoid Tipping.................................................................. 35 Never Undercut a High Bank..................................................... 36 Dig with Caution............................................................... 36 Operate with Caution........................................................... 36 Avoid Power Lines.............................................................. 37 Precautions for Lightning...................................................... 37 Object Handling................................................................ 38 Protect Against Flying Debris.................................................. 38 Park Machine Safely............................................................ 39 Handle Fluids Safely−Avoid Fires............................................... 39 Transport Safely............................................................... 40 Practice Safe Maintenance...................................................... 41 Warn Others of Service Work.................................................... 42 Support Machine Properly....................................................... 42 Stay Clear of Moving Parts..................................................... 43 Prevent Parts from Flying...................................................... 43 Avoid Injury from Attachment Falling Accident.................................. 44 Prevent Burns.................................................................. 44 Replace Rubber Hoses Periodically.............................................. 45 Avoid High-Pressure Fluids..................................................... 45 Prevent Fires.................................................................. 46 Evacuating in Case of Fire..................................................... 48 Beware of Exhaust Fumes........................................................ 48 Precautions for Welding and Grinding........................................... 49 Avoid Heating Near Pressurized Fluid Lines..................................... 50 Avoid Applying Heat to Lines Containing Flammable Fluids....................... 50 Precautions for Handling Accumulator and Gas Damper............................ 50 Remove Paint Before Welding or Heating......................................... 51 Beware of Asbestos and Silica Dust and Other Contamination..................... 51 Prevent Battery Explosions..................................................... 52 Service Air Conditioning System Safely......................................... 52 Handle Chemical Products Safely................................................ 53 Dispose of Waste Properly...................................................... 53 Never Ride Attachment.......................................................... 54 Notes on Aftertreatment Device................................................. 54 Precautions for Communication Terminal......................................... 54 Precautions for Communication Terminal Equipment............................... 55 Notes on Protection of Operator’s Station when the Machine Rolls Over.......... 57 Before Returning the Machine to the Customer................................... 58 SECTION AND GROUP CONTENTS......................................................... 59 SECTION 1 GENERAL.................................................................. 63 Group 1 Precautions for Disassembling and Assembling........................... 65 Precautions for Disassembling and Assembling............................... 65 Group 2 Tightening............................................................. 71 Tightening Bolts and Nuts.................................................. 71 Piping Joint............................................................... 74 Group 3 Painting............................................................... 81 Painting................................................................... 81 Group 4 Bleeding Air........................................................... 83 Bleeding Air from Hydraulic System......................................... 83 Bleeding Air from Fuel System.............................................. 84 Air Bleeding from the Diesel Exhaust Fluid Defrosting Piping............... 86 Group 5 Preparation............................................................ 87 Preparation before Inspection and Maintenance.............................. 87 Hydraulic Circuit Pressure Release Procedure............................... 89 Pressure Release from Hydraulic Oil Tank................................... 90 Pressure Release from Expansion Tank....................................... 91 SECTION 2 MAINTENANCE STANDARD..................................................... 95 Group 1 Upperstructure......................................................... 97 Pump Device................................................................ 97 Swing Motor................................................................101 Group 2 Undercarriage..........................................................105 Travel Motor...............................................................105 Sprocket...................................................................107 Front Idler................................................................109 Upper Roller...............................................................111 Lower Roller...............................................................112 Track......................................................................113 Group 3 Front Attachment.......................................................117 Pin and Bushing............................................................117 Side Cutter (2021232, 2021233).............................................119 Point (4512365)............................................................120 Side Cutter (4435856, 4435857).............................................121 Point (4400253)............................................................121 Standard Dimensions for Arm and Bucket Connection..........................122 Standard Dimensions for Arm and Boom Connection............................123 Cylinder...................................................................125 SECTION 3 UPPERSTRUCTURE...........................................................129 Group 1 Cab....................................................................131 Removal and Installation of Cab............................................131 Dimensions of Cab Glass....................................................157 Group 2 Counterweight..........................................................177 Removal and Installation of Counterweight..................................177 Group 3 Main Frame.............................................................181 Removal and Installation of Main Frame.....................................181 Group 4 Engine.................................................................189 Removal and Installation of Engine.........................................189 Group 8 Pump Device............................................................223 Removal and Installation of Pump Device....................................223 Removal and Installation of Coupling.......................................235 Disassembly of Pump Device.................................................237 Assembly of Pump Device....................................................245 Disassembly of Regulator...................................................257 Assembly of Regulator......................................................259 Disassembly of Solenoid Valve Unit.........................................261 Assembly of Solenoid Valve Unit............................................263 Structure of Pilot Pump....................................................265 Group 9 Control Valve..........................................................267 Removal and Installation of Control Valve..................................267 Disassembly of Housing.....................................................291 Assembly of Housing........................................................293 Disassembly of Control Valve (A Side)......................................295 Assembly of Control Valve (A Side).........................................303 Disassembly of Control Valve (B Side)......................................315 Assembly of Control Valve (B Side).........................................324 Group 10 Swing Device..........................................................337 Removal and Installation of Swing Device...................................337 Disassembly of Swing Reduction Gear........................................341 Assembly of Swing Reduction Gear...........................................347 Disassembly of Swing Motor.................................................353 Assembly of Swing Motor....................................................356 Structure of Swing Parking Brake Selection Valve...........................359 Group 11 Pilot Valve...........................................................361 Removal and Installation of Pilot Valve (Left).............................361 Removal and Installation of Pilot Valve (Right)............................373 Removal and Installation of Travel Pilot Valve.............................389 Disassembly of Pilot Valves (Right and Left)...............................393 Assembly of Pilot Valves (Right and Left)..................................396 Disassembly of Travel Pilot Valve..........................................399 Assembly of Travel Pilot Valve.............................................403 Group 12 Solenoid Valve........................................................409 Removal and Installation of Pilot Shut-Off Solenoid Valve..................409 Removal and Installation of 5-Spool Solenoid Valve Unit....................413 Removal and Installation of 2-Spool Solenoid Valve Unit....................417 Disassembly of Pilot Shut-Off Solenoid Valve...............................421 Assembly of Pilot Shut-Off Solenoid Valve..................................423 Structure of 5-Spool Solenoid Valve Unit...................................425 Structure of 2-Spool Solenoid Valve Unit...................................427 Group 13 Signal Control Valve..................................................429 Removal and Installation of Signal Control Valve...........................429 Structure of Signal Control Valve..........................................433 Group 14 Aftertreatment Device.................................................437 Removal and Installation of Aftertreatment Device..........................437 Group 15 DEF Tank..............................................................459 Removal and Installation of DEF Tank.......................................459 Group 16 Coolant Control Valve.................................................473 Removal and Installation of Coolant Control Valve..........................473 Group 17 DEF Supply Module.....................................................475 Removal and Installation of DEF Supply Module..............................475 Group 18 Fan Pump..............................................................481 Removal and Installation of Fan Pump.......................................481 Structure of Fan Pump......................................................487 Group 19 Fan Valve.............................................................489 Removal and Installation of Fan Valve......................................489 Structure of Fan Valve.....................................................493 Structure of Solenoid Valve................................................495 Group 20 Fan Motor.............................................................497 Removal and Installation of Fan Motor......................................497 Structure of Fan Motor.....................................................505 SECTION 4 UNDERCARRIAGE............................................................509 Group 1 Swing Bearing..........................................................511 Removal and Installation of Swing Bearing..................................511 Disassembly of Swing Bearing...............................................517 Assembly of Swing Bearing..................................................520 Group 2 Travel Device..........................................................523 Removal and Installation of Travel Device..................................523 Disassembly of Travel Device...............................................527 Assembly of Travel Device..................................................531 Disassembly of Travel Motor................................................539 Assembly of Travel Motor...................................................542 Disassembly of Brake Valve.................................................547 Assembly of Brake Valve....................................................549 Group 3 Center Joint...........................................................553 Removal and Installation of Center Joint...................................553 Disassembly of Center Joint................................................557 Assembly of Center Joint...................................................559 Replacement of Body and Spindle............................................562 Group 4 Track Adjuster.........................................................563 Removal and Installation of Track Adjuster.................................563 Disassembly of Front Idler.................................................567 Assembly of Front Idler....................................................570 Disassembly of Track Adjuster..............................................573 Assembly of Track Adjuster.................................................577 Group 6 Upper and Lower Rollers................................................583 Removal and Installation of Upper Roller...................................583 Removal and Installation of Lower Roller...................................589 Disassembly of Lower Roller................................................595 Assembly of Lower Roller...................................................597 Group 7 Track..................................................................601 Removal and Installation of Track..........................................601 SECTION 5 FRONT ATTACHMENT.........................................................611 Group 1 Front Attachment.......................................................613 Removal and Installation of Front Attachment...............................613 Group 2 Cylinder...............................................................623 Removal and Installation of Boom Cylinder..................................623 Removal and Installation of Arm Cylinder...................................631 Removal and Installation of Bucket Cylinder................................639 Removal and Installation of Positioning Cylinder...........................643 Disassembly of Boom, Arm, and Bucket Cylinders.............................649 Assembly of Boom, Arm, and Bucket Cylinders................................655 Disassembly of Positioning Cylinder........................................661 Assembly of Positioning Cylinder...........................................664 Group 3 Hose Rupture Valve.....................................................667 Removal and Installation of Hose Rupture Valve for Boom Cylinder...........667 Removal and Installation of Hose Rupture Valve for Arm Cylinder............671 Removal and Installation of Hose Rupture Valve for Positioning Cylinder....675 Structure of Hose Rupture Valve for Boom Cylinder (Right)..................679 Structure of Hose Rupture Valve for Boom Cylinder (Left)...................681 Structure of Hose Rupture Valve for Arm Cylinder...........................683 Structure of Hose Rupture Valve for Positioning Cylinder...................685 SERVICE MANUAL REVISION REQUEST FORM...............................................689
Please Note:
⦁ This is the SAME manual used by the dealers to troubleshoot any faults in your vehicle. This can be yours in 2 minutes after the payment is made.
⦁ Contact us at [email protected] should you have any queries before your purchase or that you need any other service / repair / parts operators manual.