Hitachi ZX350LC-6 ZX350LCN-6 Hydraulic Excavator Technical Workshop Manual (WDDQ50-EN-00) – PDF Download

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Hitachi ZX350LC-6 ZX350LCN-6 Hydraulic Excavator Technical Workshop Manual (WDDQ50-EN-00)

File Details:

Hitachi ZX350LC-6 ZX350LCN-6 Hydraulic Excavator Technical Workshop Manual (WDDQ50-EN-00)

• Manual Language:English
• Pages: 647 
• Size: 12.5 MB
• Format:PDF
• Downloadable:Yes

HITACHI ZX350LC-6 ZX350LCN-6 HYDRAULIC EXCAVATOR TECHNICAL WORKSHOP MANUAL (WDDQ50-EN-00) – PDF DOWNLOAD:

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Description:

Hitachi ZX350LC-6 ZX350LCN-6 Hydraulic Excavator Technical Workshop Manual (WDDQ50-EN-00)

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-00)

WDDQ50-EN-00...........................................................................  1
	CONTENTS...........................................................................  3
		SECTION 1GENERAL...............................................................  3
		SECTION 2MAINTENANCE STANDARD..................................................  5
		SECTION 3UPPERSTRUCTURE........................................................  7
		SECTION 4UNDERCARRIAGE.........................................................  9
		SECTION 5FRONT ATTACHMENT...................................................... 11
	INTRODUCTION....................................................................... 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............................................................ 16
	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
		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 1GENERAL................................................................... 65
		Group 1 Precautions for Disassembling and Assembling........................... 67
			Precautions for Disassembling and Assembling............................... 67
		Group 2 Tightening............................................................. 73
			Tightening Bolts and Nuts.................................................. 73
			Piping Joint............................................................... 76
		Group 3 Painting............................................................... 83
			Painting................................................................... 83
		Group 4 Bleeding Air........................................................... 85
			Bleeding Air from Hydraulic System......................................... 85
			Bleeding Air from Fuel System.............................................. 86
			Air Bleeding from the Diesel Exhaust Fluid Defrosting Piping............... 88
		Group 5 Preparation............................................................ 89
			Preparation before Inspection and Maintenance.............................. 89
			Hydraulic Circuit Pressure Release Procedure............................... 91
			Pressure Release from Hydraulic Oil Tank................................... 92
			Pressure Release from Expansion Tank....................................... 93
	SECTION 2 MAINTENANCE STANDARD..................................................... 97
		Group 1 Upperstructure......................................................... 99
			Pump Device................................................................ 99
			Swing Motor................................................................103
		Group 2 Undercarriage..........................................................107
			Travel Motor...............................................................107
			Sprocket...................................................................109
			Front Idler................................................................111
			Upper Roller...............................................................113
			Lower Roller...............................................................114
			Track......................................................................115
		Group 3 Front Attachment.......................................................119
			Pin and Bushing............................................................119
			Side Cutter (2021232, 2021233).............................................121
			Point (4512365)............................................................122
			Side Cutter (4435856, 4435857).............................................123
			Point (4400253)............................................................123
			Standard Dimensions for Arm and Bucket Connection..........................124
			Standard Dimensions for Arm and Boom Connection............................125
			Cylinder...................................................................127
	SECTION 3 UPPERSTRUCTURE...........................................................131
		Group 1 Cab....................................................................133
			Removal and Installation of Cab............................................133
		Group 2 Counterweight..........................................................179
			Removal and Installation of Counterweight..................................179
		Group 3 Main Frame.............................................................183
			Removal and Installation of Main Frame.....................................183
		Group 4 Engine.................................................................191
			Removal and Installation of Engine.........................................191
		Group 8 Pump Device............................................................227
			Removal and Installation of Pump Device....................................227
			Removal and Installation of Coupling.......................................239
			Disassembly of Pump Device.................................................241
			Assembly of Pump Device....................................................249
			Disassembly of Regulator...................................................261
			Assembly of Regulator......................................................263
			Disassembly of Solenoid Valve 
Unit........................................265
			Assembly of Solenoid Valve Unit
...........................................267
			Structure of Pilot Pump....................................................269
		Group 9 Control Valve..........................................................271
			Removal and Installation of Control Valve..................................271
		Group 10 Swing Device..........................................................295
			Removal and Installation of Swing Device...................................295
			Disassembly of Swing Reduction Gear........................................299
			Assembly of Swing Reduction Gear...........................................305
			Disassembly of Swing Motor.................................................311
			Assembly of Swing Motor....................................................314
			Structure of Swing Parking Brake Selection Valve...........................317
		Group 11 Pilot Valve...........................................................319
			Removal and Installation of Pilot Valve (Left).............................319
			Removal and Installation of Pilot Valve (Right)............................331
			Removal and Installation of Travel Pilot Valve.............................347
			Disassembly of Pilot Valves (Right and Left)...............................351
			Assembly of Pilot Valves (Right and Left)..................................354
			Disassembly of Travel Pilot Valve..........................................357
			Assembly of Travel Pilot Valve.............................................361
		Group 12 Solenoid Valve........................................................367
			Removal and Installation of Pilot Shut-Off Solenoid Valve..................367
			Removal and Installation of 5-Spool Solenoid Valve Unit....................371
			Removal and Installation of 2-Spool Solenoid Valve Unit....................375
			Disassembly of Pilot Shut-Off Solenoid Valve...............................379
			Assembly of Pilot Shut-Off Solenoid Valve..................................381
			Structure of 5-Spool Solenoid Valve Unit...................................383
			Structure of 2-Spool Solenoid Valve Unit...................................385
		Group 13 Signal Control Valve..................................................387
			Removal and Installation of Signal Control Valve...........................387
			Structure of Signal Control Valve..........................................391
		Group 14 Aftertreatment Device.................................................395
			Removal and Installation of Aftertreatment Device..........................395
		Group 15 DEF Tank..............................................................417
			Removal and Installation of DEF Tank.......................................417
		Group 16 Coolant Control Valve.................................................431
			Removal and Installation of Coolant Control Valve..........................431
		Group 17 DEF Supply Module.....................................................433
			Removal and Installation of DEF Supply Module..............................433
		Group 18 Fan Pump..............................................................439
			Removal and Installation of Fan Pump.......................................439
			Structure of Fan Pump......................................................445
		Group 19 Fan Valve.............................................................447
			Removal and Installation of Fan Valve......................................447
			Structure of Fan Valve.....................................................451
			Structure of Solenoid Valve................................................453
		Group 20 Fan Motor.............................................................455
			Removal and Installation of Fan Motor......................................455
			Structure of Fan Motor.....................................................463
	SECTION 4 UNDERCARRIAGE............................................................467
		Group 1 Swing Bearing..........................................................469
			Removal and Installation of Swing Bearing..................................469
			Disassembly of Swing Bearing...............................................475
			Assembly of Swing Bearing..................................................478
		Group 2 Travel Device..........................................................481
			Removal and Installation of Travel Device..................................481
			Disassembly of Travel Device...............................................485
			Assembly of Travel Device..................................................489
			Disassembly of Travel Motor................................................497
			Assembly of Travel Motor...................................................500
			Disassembly of Brake Valve.................................................505
			Assembly of Brake Valve....................................................507
		Group 3 Center Joint...........................................................511
			Removal and Installation of Center Joint...................................511
			Disassembly of Center Joint................................................515
			Assembly of Center Joint...................................................517
			Replacement of Body and Spindle............................................520
		Group 4 Track Adjuster.........................................................521
			Removal and Installation of Track Adjuster.................................521
			Disassembly of Front Idler.................................................525
			Assembly of Front Idler....................................................528
			Disassembly of Track Adjuster..............................................531
			Assembly of Track Adjuster.................................................535
		Group 6 Upper and Lower Rollers................................................541
			Removal and Installation of Upper Roller...................................541
			Removal and Installation of Lower Roller...................................547
			Disassembly of Lower Roller................................................553
			Assembly of Lower Roller...................................................555
		Group 7 Track..................................................................559
			Removal and Installation of Track..........................................559
	SECTION 5 FRONT ATTACHMENT.........................................................569
		Group 1 Front Attachment.......................................................571
			Removal and Installation of Front Attachment...............................571
		Group 2 Cylinder...............................................................581
			Removal and Installation of Boom Cylinder..................................581
			Removal and Installation of Arm Cylinder...................................589
			Removal and Installation of Bucket Cylinder................................597
			Removal and Installation of Positioning Cylinder...........................601
			Disassembly of Boom, Arm, and Bucket Cylinders.............................607
			Disassembly of Positioning Cylinder........................................619
			Assembly of Positioning Cylinder...........................................622
		Group 3 Hose Rupture Valve.....................................................625
			Removal and Installation of Hose Rupture Valve for Boom Cylinder...........625
			Removal and Installation of Hose Rupture Valve for Arm Cylinder............629
			Removal and Installation of Hose Rupture Valve for Positioning Cylinder....633
			Structure of Hose Rupture Valve for Boom Cylinder (Right)..................637
			Structure of Hose Rupture Valve for Boom Cylinder (Left)...................639
			Structure of Hose Rupture Valve for Arm Cylinder...........................641
			Structure of Hose Rupture Valve for Positioning Cylinder...................643
	SERVICE MANUAL REVISION REQUEST FORM...............................................647

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