Hitachi EX300, EX330, EX330, EX370 Excavators Repair Service Manuals
Complete service repair manual with electrical wiring diagrams for Hitachi EX300, EX330, EX330, EX370 Excavators, with workshop information to maintain, diagnose, repair, and service like professional mechanics.
Hitachi EX300, EX330, EX330, EX370 Excavators workshop service repair manual includes:
* Numbered table of contents easy to use so that you can find the information you need fast.
* Detailed sub-steps expand on repair procedure information
* Numbered instructions guide you through every repair procedure step by step.
* Troubleshooting and electrical service procedures are combined with detailed wiring diagrams for ease of use.
* Notes, cautions and warnings throughout each chapter pinpoint critical information.
* Bold figure number help you quickly match illustrations with instructions.
* Detailed illustrations, drawings and photos guide you through every procedure.
* Enlarged inset helps you identify and examine parts in detail.
Total Pages: 6,332 pages
File Format: PDF (bookmarked, ToC, Searchable, Printable, high quality)
Language: English
MANUAL LIST:
TO140E-01 - Hitachi EX300-3C Excavator Technical Manual (Operational Principle).pdf
TT140E-01 - Hitachi EX300-3C Excavator Technical Manual (Troubleshooting).pdf
W140E-01 - Hitachi EX300-3C Excavator Workshop Manual.pdf
T173E00 - Hitachi EX300-5, EX300LC-5, EX330LC-5, EX330H-5, EX330LCH-5, EX370-5, EX370HD-5 Excavator Technical Manual (Service & Repair)
T173E00CIR - Hitachi EX300-5, EX300LC-5, EX330LC-5, EX330H-5, EX330LCH-5, EX370-5, EX370HD-5 Excavator Electrical Circuit Diagram
EM1H1NA11 - Hitachi EX330LC-5, EX370-5 Hydraulic Excavator Operator's Manual.pdf
EM1H1NA21 - Hitachi EX330LC-5, EX370-5 Hydraulic Excavator Operator's Manual.pdf
EM15K12 - Hitachi EX300-2, EX300LC-2, EX300H-2, EX300LCH-2 Excavator Operator's Manual.pdf
EM15KNA11 - Hitachi EX300-2, EX300LC-2, EX300H-2, EX300LCH-2 Excavator Operator's Manual.pdf
EM15912 - Hitachi EX300, EX300LC Hydraulic Excavator Operation Manual.pdf
KM110E01 - Hitachi EX300-2, EX300LC-2, EX300H-2, EX300LCH-2 Excavator Technical Manual (Service & Repair).pdf
KM140E00 - Hitachi EX300-3, EX300LC-3 Excavator Technical Manual (Service & Repair).pdf
KM10300 - Hitachi EX300, EX300LC Excavator Technical Manual (Service & Repair).pdf
W173ENA - Hitachi EX330LC-5, EX370-5 Hydraulic Excavator Workshop Manual.pdf
Table of Contents
TM.....11
INDEX.....11
Cover.....11
Introduction.....12
Safty.....14
T1.....40
CONTENTS(173T-1-1).....40
SECTION 1 GENERAL.....40
Group 1 Specification.....42
Specifications.....42
Working Range and Machine Dimensions for Transportation.....45
Component Specifications.....48
Group 2 Component Layout.....54
Main Components.....54
Electrical System (Overall System).....55
Electrical System (Relays).....56
Electrical System (Monitor and Switch Panels).....57
Other Components.....58
T2.....60
CONTENTS(173T-2-1).....60
SECTION 2 SYSTEM.....60
Group 1 Control System.....62
Outline.....62
Engine Control.....63
Pump Control.....70
Valve Control.....71
Other Control Function.....75
Group 2 Hydraulic System.....76
Main Circuit.....76
Pilot Circuit.....77
Neutral Circuit.....79
Single Actuator Operation.....79
Combined Operation.....81
Group 3 Electrical System.....86
Outline.....86
Electric Power Circuit.....87
Bulb Check Circut.....88
Accessory Cirucuit.....89
Preheat Circuit.....90
Starting Circuit.....91
Charging Circuit.....93
Surge Voltage Prevention Circuit.....96
Engine Stop Circuit.....97
T3.....98
CONTENTS(173T-3-1).....98
SECTION 3 COMPONENT OPERATION.....98
Group 1 Pump Device.....100
Outline.....100
Main Pump.....101
Regulator.....103
Pilot Pump.....110
N Sensor.....110
Pump Delevery Pressure Sensor.....110
Group 2 Swing Device.....112
Outline.....112
Swing Motor.....113
Swing Parking Brake.....114
Valve Unit.....115
Swing Reduction Gear.....117
Group 3 Control Valve.....118
Outline.....118
Hydraulic Circuit.....123
Flow Combiner Valve.....127
Pump Control Valve.....129
Main Relief Valve.....131
Overload Relief Valve.....132
Arm Regenerative Valve.....133
Boom Regenerative Valve.....135
Arm Anti-Drift Valve (Bottom Side).....137
Arm Anti-Drift Valve (On Rod Side)/Boom Anti-Drift Valve.....140
Bucket Flow Rate Control Valve.....141
Travel Flow Rate Control Valve.....143
Bypass Shut-Out Valve.....145
Needle Valve.....147
Group 4 Pilot Valve.....148
Outline.....148
Operation.....149
Group 5 Travel Device.....158
Outline.....158
Travel Motor.....159
Parking Brake.....161
Travel Speed Control.....163
Travel Brake Valve.....167
Travel Reduction Gear.....171
Group 6 Others (Upperstructure).....172
Pilot Shut-Off valve.....172
Shockless Valve.....173
Solenoid Valve Unit.....175
Pilot Relief Valve.....177
EC Motor.....177
Group 7 Others (Undercarriage).....178
Swing Bearing.....178
Center Joint.....179
Track Adjuster.....181
T4.....182
CONTENTS(173T-4-1).....182
SECTION 4 OPERATIONAL PERFORMANCE TEST.....182
Group 1 Introducution.....184
Operational Performance tests.....184
Preparation for Performance tests.....185
Group 2 Engine Test.....186
Engine Speed.....186
Engine Compression Pressure.....188
Valve Clearance Adjustment.....189
Nozzle Check.....191
Injection Timing.....193
Group 3 Excavator Test.....196
Travel Speed.....196
Track Revolution Speed.....197
Mistrack Check.....198
Travel Parking Function Check.....199
Swing Speed.....200
Swing Function Drift Check.....201
Swing Motor Leakage.....202
Swing Bearing Play.....203
Maximum Swingable Slant Angle.....204
Hydraulic Cylinder Cycle Time.....205
Dig Function Drift Check.....206
Control Lever Operating Force.....208
Control Lever Stroke.....209
Combined Boom Raise/Swing Function Check.....210
Group 4 Component Test.....212
Primary Pilot Pressure.....212
Secondary Pilot Pressure.....214
Solenoid Valve Set Pressure.....215
Main Relief Valve Set Pressure.....217
Overload Relief Valve Set Pressure.....221
Main Pump Flow Rate.....223
Swing Motor Drainage.....229
Travel Motor Drainage.....231
Group 5 Standard.....234
Operational Performance Standard Table.....234
Main Pump P-Q Curve.....237
Injection Pump.....239
T5.....240
CONTENTS(173T-5-1).....240
SECTION 5 TROUBLESHOOTING.....240
Group 1 Diagnosing Procedure.....242
Introduction.....242
Diagnosing Procedure.....243
Dr.EX.....245
Dr.EX Start-Up Procedure.....245
Fault Code.....246
Dr.EX Monitoring Function.....247
Dr.EX Special Function (Service Mode).....248
Controllable Data.....255
Group 2 Component Layout.....256
Main Components.....256
Electrical System (Overall Syatem).....257
Electrical System (Relays).....258
Electrical System (Monitor and Switch Panels).....259
Others Components.....265
Group 3 Troubleshooting A.....268
Troubleshooting A Procedure.....268
Fault Code.....269
Fault Code 01.....270
Fault Code 02, 03.....271
Fault Code 04, 05.....272
Fault Code 06.....273
Fault Code 07.....274
Sensor Operating Range List.....275
Group 4 Troubleshooting B.....276
Troubleshooting B Procedure.....276
Relationship Between Machine Trouble Symptoms and Parts in Trouble.....277
Correlation Between Trouble Symptoms and Part Failures.....287
Engine TroubleShooting.....293
Overall Actuator System Troubleshooting.....307
Front Attachment Control System Troubleshooting.....313
Swing System Troubleshooting .....325
Travel System Troubleshooting.....328
Troubleshooting for Other Functions.....333
Engine Speed Adjustment and Engine Learning.....335
Exchange Inspection Method.....336
Boom Lowering Method When Engine Stalls.....337
Group 5 Troubleshooting C.....338
Traubleshooting C Procedure.....338
Malfunction of Coolant Temperature Gauge.....339
Malfunction of Fuel Gauge.....341
Malfunction of Indecator Light Check System.....343
Malfunction of Level Check Switch.....343
Malfunction of Preheat Indicator.....344
Malfunction of Engine Oil Level Indicator.....345
Malfunction of Coolant Level Indicator.....347
Malfunction of Hydraulic Oil Level INdicator.....349
Malfunction of Alternator Indicator.....351
Malfunction of Engine Oil Pressure Indicator.....353
Malfunction of Overheat Indicator.....355
Malfunction of Fuel Level Indicator.....357
Malfunction of Air Filter Restriction Indicator.....359
Malfunction of Buzzer.....361
Malfunction of Hour Meter.....363
Group 6 Electrical System Inspection.....364
Precautions for Inspection and Maintenace.....364
Instructions for Disconnecting Connectors.....366
Fuse Continuity Test.....367
Inspection and Replacement of Fusible Links.....368
Battery Voltage Check.....369
How to Troubleshoot Alternator Malfunctions.....370
Continuity Check.....371
Voltage and Current Check.....373
Replacement of Relay.....377
Group 7 Harness Check.....378
Circuit Check.....378
WM.....380
W1.....380
CONTENTS(173W-1-1).....380
SECTION 1 GENERAL INFORMATION.....380
Group 1 Precautions for Disassembling and Assembling.....382
Precautions for Disassembly and Assembly.....382
Group 2 Tightening Torque.....386
Tightening Torque Specifications.....386
Torqr Chart.....387
Piping Joint.....390
W2.....394
CONTENTS(173W-2-1).....394
SECTION 2 UPPERSTRUCTURE.....394
Group 1 Cab.....396
Remove and Install Cab.....396
Dimensions of the Cab Glass.....402
Group 2 Counterweight.....404
Remove and Install Couterweight.....404
Group 3 Main Frame.....406
Remove and Install Main Frame.....406
Group 4 Pump Device.....412
Remove and Install Pump Device.....412
Desassemble Pump Device.....415
Assemble Pump Device.....421
Disassemble Main Pump.....429
Assemble Main Pump.....437
Disassemble Regulator.....451
Assemble Regulator.....453
Disassemble and Assemble Pilot Pump.....455
Maintenance Standard.....459
Group 5 Control Valve.....462
Remove and Install Control Valve.....462
Disassemble Control Valve (1).....465
Assemble Control Valve (1).....467
Disassemble Control Valve (2).....469
Assemble Control Valve (2).....471
Disassemble Control Valve (3).....473
Assemble Control Valve (3).....475
Disassemble Control Valve (4).....479
Assemble Control Valve (4).....481
Disassemble Control Valve (5).....483
Assemble Control Valve (5).....485
Disassemble Control Valve (6).....487
Assemble Control Valve (6).....489
Structure of Valves.....491
Group 6 Swing Device.....498
Remove and Install Swing Device.....498
Disssemble Swing Device.....501
Assemble Swing Device.....505
Disassemble Swing Motor.....511
Assemble Swing Motor.....515
Disassemble and Assemble Parking Brake Release Valve.....519
Maintenance Standard.....520
Group 7 Pilot Valve.....522
Remove and Install Right Pilot Valve.....522
Remove and Install Left Pilot Valve.....525
Remove and Install Travel Pilot Valve.....528
Disassemble Right and Left Pilot Valve.....531
Assemble Right and Left Pilot Valve.....533
Disassemble Travel Pilot Valve.....537
Assemble Travel Pilot Valve.....541
Group 8 Pilot Shut-Off Valve.....546
Remove and Install Pilot Shut-Off Valve.....546
Disassemble Pilot Shut-Off Valve.....549
Assemble Pilot Shut-Off Valve.....551
Group 9 Shockless Valve.....554
Remove and Install Shockless Valve.....554
Disassemble and Assemble Shockless Valve.....556
Group 10 Solenoid Valve.....560
Remove and Install Solenoid Valve Unit.....560
Disassemble Proportional Solenoid Valve.....562
Assemble Proportional Solenoid Valve.....563
Group 11 Pilot Relief Valve Unit.....566
Remove and Install Pilot Relief Valve Unit.....566
Disassemble Pilot Relief Valve.....568
Assemble Pilot Relief Valve.....569
W3.....572
CONTENTS(173W-3-1).....572
SECTION 3 UNDERCARRIAGE.....572
Group 1 Swing Bearing.....574
Remove and Install Swing Bearing.....574
Disassemble Swing Bearing.....577
Assemble Swing Bearing.....579
Group 2 Travel Device.....582
Remove and Install Travel Device (EX300-5, EX350H-5).....582
Disassemble Travel Device (EX300-5, EX350H-5).....584
Assemble Travel Device (EX300-5, EX350H-5).....591
Disassemble Travel Motor (EX300-5, EX350H-5).....599
Assemble Travel Motor (EX300-5, EX350H-5).....605
Disassemble Brake Valve (EX300-5, EX350H-5).....615
Assemble Brake Valve (EX300-5, EX350H-5).....617
Maintenance Standard.....619
Remove and Install Travel Device (EX370HD-5).....621
Disassemble Travel Device (EX370HD-5).....623
Assemble Travel Device (EX370HD-5).....631
Disassemble Travel Motor (EX370HD-5).....643
Assemble Travel Motor (EX370HD-5).....647
Disassemble Brake Valve (EX370HD-5).....651
Assemble Brake Valve (EX370HD-5).....653
Maintenance Standard (EX370HD-5).....655
Group 3 Center Joint.....658
Remove and Install Center Joint.....658
Disassemble Center Joint.....660
Assemble Center Joint.....663
Maintenance Standard.....666
Group 4 Track Adjuster.....668
Remove and Install Track Adjustere (EX300-5, EX350H-5).....668
Disassemble Track Adjustere (EX300-5, EX350H-5).....669
Assemble Track Adjustere (EX300-5, EX350H-5).....675
Remove and Install Track Adjuster (EX370HD-5).....682
Disassemble Track Adjuster (EX370HD-5).....683
Assemble Track Adjuster (EX370HD-5).....689
Group 5 Front Idler.....696
Remove and Install Front Idler.....696
Disassemble Front Idler.....697
Assemble Front Idler.....701
Maintenance Standard.....705
Group 6 Upper and Lower Roller.....706
Remove and Install Upper Roller.....706
Remove and Install Lower Roller.....709
Disassemble Upper Roller (EX370HD-5).....713
Assemble Upper Roller (EX370HD-5).....715
Disassemblel Lower Roller.....717
Assemble Lower Roller.....719
Maintenance Standard.....721
Group 7 Track.....724
Remove and Install Tracks.....724
Maintenance Standard.....730
W4.....732
CONTENTS(173W-4-1).....732
SECTION 4 FRONT ATTACHMENT.....732
Group 1 Front Attachment.....734
Remove and Install Front Attachmet.....734
Maintenance Standare.....739
Standard Dimensions for Arm and Bucket Connection.....742
Group 2 Cylinder.....744
Remove and Install Cylinder.....744
Hydraulic Circuit Pressure Release Procedure.....755
Cylinder Air Bleeding Procedure.....756
Disassemble Cylinder.....757
Assemble Cylinder.....763
Maintenance Standard.....767
W5.....768
CONTENTS(173W-5-1).....768
SECTION 5 ENGINE.....768
General Information.....770
General servicing precautions.....771
Notes on the Format of this Manual.....772
About Angular Tightening.....775
Main Data and Specifications.....776
Performance Curve.....778
External View.....780
Tightening Torque Specifications.....782
Tightening Torque for Main Parts.....784
Model and Identificaiton Serial Number.....792
Maintenance.....793
Lubrication system.....794
Fuel System.....796
Cooling System.....799
Valve Clearance Adjustment.....800
Fuel Injection Timing.....802
Recommended Lubricating Oil.....805
Cylinder Compression Pressure.....806
Engine Repair Kit.....807
Engine 1 (Disassembly).....808
External Viwe.....809
Disassembly 1.....810
Disassembly 2.....813
Disassembly 3.....816
Cylinder Head Disassembly.....820
Rocker Arm Shaft Disassembly.....822
Piston and Connecting Rod Disassembly.....823
Engine 2 (Inspection and Repair).....825
Inspection and repair (1).....826
Cylinder Head.....826
Valve Guide.....827
Valve and Valve Seat Insert.....828
Valve Spring.....831
Rocker Arm Shaft and Rocker Arm.....832
Camshaft.....834
Inspection and repair (2).....836
Cylinder Block, Cylinder Liner.....836
Piston.....841
Piston Ring.....842
Piston Pin.....843
Connecting Rod.....844
Crankshaft.....845
Crankshaft and Bearing.....846
Front Cover Oil Seal.....854
Crankshaft Rear Oil Seal.....855
Engine 3 (Assembly).....856
Rocker Arm Shaft Assembly.....857
Cylinder Head Assembly.....859
Piston and Connecting Rod Assembly.....862
Assembly 1.....865
Assembly 2.....872
Assembly 3.....878
Timing Gear Traing Diagram.....885
Lubrication System.....886
Introduction.....887
Oil Pump.....888
Oil Filter.....892
Oil Cooler.....893
Cooling System.....897
Introduction.....898
Water Pump.....899
Thermostat.....906
Fuel System.....907
Introduction.....908
Nozzle Holder Assembly.....909
Turbocharger.....914
Inspection and Repairs.....915
Engine Electrical.....916
Starter.....917
Main Data and Specifications.....917
Specional Diagram.....918
Performance Characteristics.....918
Disassembly.....919
Inspection and Repair.....922
Assembly.....925
Alternator.....928
Main Data and Specifications.....928
Spectional Diagram.....928
Performance Characteristics.....929
Circuit Diagram.....929
Disassembly.....930
Inspection and Repair.....931
Assembly.....934
Troubleshooting.....936
Starting Difficulties.....937
1) Starter doesn't turn.....937
2) Starter turns, but engine does'nt turn over.....938
3) The engine turns and fuel reaches the injection pump, but it does'nt start.....939
4) The engine turns, but does not start.....939
5) Fuel isn't supplied to the injection pump.....940
Unstable Idling rpm.....941
Lack of Power.....943
Excessive Fuel Consumption.....946
Excessive Oil Consumption.....948
Overheating.....949
White Smoke in Exhaust.....950
Black Smoke in Exhaust.....951
Low Oil pressure.....952
Engine Sounds.....954
1) Knocking.....954
2) Gas leak Sounds.....954
3) Continuous Sounds.....955
4) Clanking Sounds.....956
Special Tool.....957
Special Tool List.....958
Repair Standards.....960
General Rules.....960
Repair Standards.....961
EX300-3C TECHNICAL MANUAL (TROUBLESHOOTING).....1
INTRODUCTION.....2
SAFETY.....4
CONTENTS.....28
SECTION 06 OPERATIONAL PERFORMANCE TEST.....30
CONTENTS.....30
Group 01 INTRODUCTION.....32
PURPOSE.....32
TERMINOLOGY.....32
PREPARATION FOR PERFORMANCE TEST.....33
Group 02 ENGINE TEST.....34
ENGINE SPEED.....34
ENGINE COMPRESSION PRESSURE.....36
VALVE CLEARANCE ADJUSTMENT.....37
NOZZLE CHECK.....39
INJECTION TIMING.....41
Group 03 EXCAVATOR TEST.....42
TRAVEL SPEED.....42
TRACK REVOLUTION SPEED.....43
MISTRACK CHECK.....44
TRAVEL PARKING FUNCTION CHECK.....45
SWING SPEED.....46
SWING FUNCTION DRIFT CHECK.....47
SWING MOTOR LEAKAGE.....48
SWING BEARING PLAY.....49
HYDRAULIC CYLINDER CYCLE TIME.....50
DIG FUNCTION DRIFT CHECK.....51
CONTROL LEVER OPERATING FORCE.....52
CONTROL LEVER STROKE.....53
COMBINED BOOM RAISE/SWING FUNCTION CHECK.....54
Group 04 COMPONENT TEST.....56
PILOT PRIMARY PRESSURE.....56
PILOT SECONDARY PRESSURE, TRAVEL PILOT PRESSURE SENSOR OUTPUT.....58
TRAVEL SPEED SELECTING PRESSURE (PRESSURE SA).....59
PUMP TORQUE CONTROL PRESSURE (PRESSURE SB).....60
M3 AND M4 WORK MODE CONTROL PRESSURE (PRESSURE SC).....61
PUMP DISPLACEMENT ANGLE CONTROL PRESSURE (SOLENOID VALVE-3).....63
MAIN RELIEF PRESSURE SHIFT PRESSURE (PRESSURE PR).....64
SWING PARKING BRAKE RELEASE PRESSURE (PRESSURE SH).....65
PUMP CONTROL VALVE PRESSURE.....66
MAIN RELIEF PRESSURE SETTING.....67
OVERLOAD RELIEF VALVE PRESSURE SETTING.....69
MAIN PUMP FLOW TEST.....70
SWING MOTOR DRAINAGE.....74
TRAVEL MOTOR DRAINAGE.....76
Group 05 STANDARD.....78
OPERATIONAL PERFORMANCE STANDARD.....78
SECTION 07 TROUBLESHOOTING.....86
CONTENTS.....86
Group 01 DIAGNOSING PROCEDURE.....88
INTRODUCTUIN.....88
DIAGNOSING PROCEDURE.....89
Dr. EX.....94
Dr. EX START-UP PROCEDURE.....94
CLEANING SELF-DIAGNOSING FUNCTION.....95
RETRIAL "A".....95
RETRIAL "B".....96
SELF-DIAGNOSING FUNCTION.....97
Group 02 TROUBLESHOOTING A.....98
LIST OF EC-RELATED FAULT CODES.....98
LIST OF PVC RELATED FAULT CODES.....99
EC-RELATED FAULT CODES (FAULT CODES 01,02,03,04 AND 06).....100
FAULT CODE 05.....101
HARNESS CHECK BETWEEN PVC AND EC.....102
FAULT CODES 09 AND 10.....103
FAULT CODE 13.....105
PVC-RELATES FAULT CODES (FAULT CODES 17,18,19 AND 21).....107
FAULT CODE 20.....108
FAULT CODES 25,26,27 AND 28.....109
FAULT CODES 33,34,35 AND 36.....111
Group 03 TROUBLESHOOTING B.....114
OUTLINE.....114
EFFECTS OF ELECTRONIC COMPONENT MALFUNCTIONS ON MACHINE OPERATION.....115
ENGINE TROUBLESHOOTING.....119
ACTUATORS TROUBLESHOOTING.....128
FRONT OPERATION TROUBLESHOOTING.....130
SWING OPERATION TROUBLESHOOTING.....134
TRAVEL OPERATION TROUBLESHOOTING.....137
OTHER TROUBLESHOOTING.....141
Group 04 TROUBLESHOOTING C.....148
MONITOR PANEL, SWITCH AND SENSOR LOCATION.....148
MALFUNCTION OF COOLANT TEMPERATURE GAUGE.....149
MALFUNCTION OF FUEL GAUGE.....151
MALFUNCTION OF LEVEL CHECK SWITCH .....153
MALFUNCTION OF ENGINE OIL LEVEL INDICATOR.....155
MALFUNCTION OF COOLANT LEVEL INDICATOR.....157
MALFUNCTION OF HYDRAULIC OIL LEVEL INDICATOR.....159
MALFUNCTION OF ALTERNATOR INDICATOR.....161
MALFUNCTION OF ENGINE OIL PRESSURE INDICATOR.....163
MALFUNCTION OF OVERHEAT INDICATOR.....165
MALFUNCTION OF FUEL LEVEL INDICATOR.....167
MALFUNCTION OF AIR FILTER RESTRICTION INDICATOR.....169
MALFUNCTION OF BUZZER.....171
MALFUNCTION OF HOUR METER.....173
Group 05 HARNESS TEST.....176
ELECTRICAL TEST PRECAUTIONS.....176
CONTINUITY CHECK.....177
VOLTAGE CHECK.....178
5 VOLT CIRCUIT.....179
CHECK USING FALSE SIGNAL.....180
RESISTANCE CHECK.....182
LAMP HARNESS CHECK.....183
ELECTRIC WIRING DIAGRAM.....188
HYDRAULIC CIRCUIT DEIAGRAM.....189
ENGINE HARNESS.....190
CAB HARNESS.....191
EX300-3C TECHNICAL MANUAL (OPERATIONAL PRINCIPLE).....1
INTRODUCTION.....2
CONTENTS.....4
SECTION 01 SPECIFICATIONS.....6
CONTENTS.....6
Group 01 GENERAL INFORMATION.....8
FOREWORD.....8
SPECIFICATIONS.....9
WORKING RANGE TRANSPORTATION.....10
SHOE TYPE AND APPLICATIONS.....11
WEIGHT.....12
Group 02 FUELS AND LUBRICANTS.....14
SERVICE REFILL CAPACITIES.....14
FUEL.....14
GREASING.....15
ENGINE OIL.....16
GEAR OIL.....17
HYDRAULIC SYSTEM.....18
COOLING SYSTEM.....19
Group 03 INTERCHANGEABILITY.....22
INTERCHANGEABILITYY.....22
INSTALLATION OF ATTACHMENT.....23
Group 04 MACHINE NUMBERS.....24
MACHINE NUMBERS.....24
Group 05 COMPONENT SPECIFICATIONS.....26
ENGINE.....26
ENGINE ACCESSORIES.....29
HYDRAULIC DEVICES.....29
ELECTRIC EQUIPMENT.....31
SECTION 02 UPPERSTRUCTURE.....34
CONTENTS.....34
Group 01 LAYOUT.....36
LAYOUT OF UPPERSTRUCTURE.....36
Group 02 TANK.....38
HYDRAULIC OIL TANK.....38
FUEL TANK.....38
Group 03 PUMP DEVICE.....40
GENERAL.....40
MAIN PUMP.....41
REGULATOR.....44
PILOT PUMP.....54
ENGINE SPEED SENSOR.....54
PRESSURE SENSOR.....54
Group 04 SWING DEVICE.....56
GENERAL.....56
SWING MOTOR.....57
BRAKE VALVE.....59
SWING PARKING BRAKE.....63
SWING REDUCTION GEAR.....64
Group 05 CONTROL VALVE.....66
GENERAL.....66
HYDRAULIC CIRCUIT.....67
FLOW COMBINER VALVE.....76
SHIFTING MAIN RELIEF PRESSURE.....77
PUMP CONTROL VALVE.....78
HIGH PRESSURE MAIN RELIEF VALVE.....80
LOW PRESSURE MAIN RELIEF VALVE.....81
OVERLOAD RELIEF VALVE.....82
Group 06 PILOT VALVE.....84
OUTLINE.....84
OPERATION.....88
Group 07 OTHERS.....94
PILOT SHUT-OFF VALVE.....94
SHOCKLESS VALVE.....95
WARM-UP CIRCUIT.....95
ACCUMULATOR.....96
SOLENOID VALVE.....97
ENGINE SPEED CONTROL LEVER.....101
SECTION 03 UNDERCARRIAGE.....104
CONTENTS.....104
Group 01 OUTLINE.....106
COMPONENT LOCATION.....106
Group 02 TRAVEL DEVICE.....108
OUTLINE.....108
TRAVEL REDUCTION GEARS.....109
TRAVEL MOTOR.....110
TRAVEL BRAKE VALVE.....115
PARKING BRAKE.....118
Group 03 OTHERS.....120
SWING BEARING.....120
CENTER JOINT.....121
TRACK ADJUSTER.....122
SECTION 04 ELECTRICAL SYSTEM.....126
CONTENTS.....126
Group 01 COMPONENT LOCATION.....128
COMPONENT LOCATION.....128
RELAYS.....129
MONITOR AND SWITCH PANEL.....130
CHARACTERISTICS OF THE ELECTRICAL SYSTEM.....131
Group 02 MAIN CIRCUIT.....132
OUTLINE.....132
POWER CIRCUIT.....133
PREHEAT CIRCUIT.....135
ENGINE START CIRCUIT.....137
CHARGING CIRCUIT.....139
OPERATION OF THE REGULATOR.....141
VOLTAGE ADJUSTMENT.....142
SURGE VOLTAGE PREVENTION CIRCUIT.....143
ACCESSORY CIRCUIT.....145
ENGINE STOP CIRCUIT.....146
Group 03 CONTROL SYSTEM.....150
OUTLINE.....150
OUTLINE OF ENGINE CONTROL.....152
OUTLINE OF PUMP CONTROL.....154
OUTLINE OF OTHER CONTROL.....155
DIAGNOSING FUNCTION.....157
ENGINE CONTROL SYSTEM.....158
FUNCTION.....161
Group 04 MONITOR.....164
OUTLINE OF THE MONITOR.....164
MONITOR PANEL.....165
MONITOR FUNCTION.....166
MONITOR CHECK PROCEDURE.....172
Group 05 INSPECTION AND MAINTENANCE.....174
PRECAUTIONS FOR INSPECTION AND MAINTENANCE.....174
FUSE CONTINUITY TEST.....175
INSPECTION AND REPLACEMENT OF FUSIBLE LINK.....176
HOW TO TROUBLESHOOT MALFUNCTIONS OF ALTERNATOR.....177
POSITIONING AND VOLTAGE ADJUSTMENT OF THE EC SENSOR.....179
INSTALLATION OF THE EX MOTOR.....179
TAKING APART CONNECTOR.....180
TYPE OF CONNECTOR.....182
LIST OF EX RELATING FAULT CODES.....189
LIST OF PVC RELATING FAULT CODES.....190
Dr. EX MONITOR FUNCTION.....191
SECTION 05 HYDRAULIC SYSTEM.....196
CONTENTS.....196
Group 01 GENERAL.....198
GENERAL.....198
HYDRAULIC CIRCUIT.....199
MAIN CIRCUIT.....200
PILOT CIRCUIT.....201
Group 02 CONROL SYSTEM.....202
GENERAL.....202
E-P CONTROL.....204
PUMP TORQUE CONTROL.....209
SPEED SENSING CONTROL.....209
WORK MODE CONTROL.....211
TRAVEL MOTOR SWASH ANGLE AUTO-CONTROL.....213
Group 03 CIRCUIT OPERATION.....216
NEUTRAL CIRCUIT.....216
SINGLE ACTUATOR OPERATION.....217
COMBINED OPERATION.....218
Hitachi EX300, EX330, EX330, EX370 Excavators Repair Service Manuals
