Hitachi ZX350LC-6 ZX350LCN-6 Hydraulic Excavator Technical Workshop Manual (WDDQ50-EN-01) – PDF Download

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Hitachi ZX350LC-6 ZX350LCN-6 Hydraulic Excavator Technical Workshop Manual (WDDQ50-EN-01)

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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

HITACHI ZX350LC-6 ZX350LCN-6 HYDRAULIC EXCAVATOR TECHNICAL WORKSHOP MANUAL (WDDQ50-EN-01) – PDF DOWNLOAD:

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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.