Hitachi ZX 890LCH-7 890LCR-7 Hydraulic Excavator Operational Technical Manual PN:TOJBR41

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Hitachi ZX 890LCH-7 890LCR-7 Hydraulic Excavator Operational Technical Manual PN:TOJBR41 –  PDF DOWNLOAD

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Hitachi ZX 890LCH-7 890LCR-7 Hydraulic Excavator Operational Technical Manual PN:TOJBR41 –  PDF DOWNLOAD

Language :English
Pages :399
Downloadable : Yes
File Type : PDF

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DESCRIPRION:

Hitachi ZX 890LCH-7 890LCR-7 Hydraulic Excavator Operational Technical Manual PN:TOJBR41 –  PDF DOWNLOAD

Service Manual consists of the following separate Part No.
Technical Manual (Operational Principle) : Vol. No.TOJBR41-EN
Technical Manual (Troubleshooting) : Vol. No.TTJBR41-EN
Workshop Manual : Vol. No.WJBR41-EN
Engine Manual : Vol. No.ETJAQ51-EN, EWJAQ51-EN

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. (Note: Do not tear off the form. Copy
this form for usage.)
• Service Material Development Center Hitach Construction Machinery Co., Ltd.
• TEL: 81-29-832-9673
• FAX: 81-29-831-1162
• E-mail: [email protected]
All information, illustrations and specifications in this manual are based on the latest product information available at the
time of publication. The right is reserved to make changes at any time without notice.
Additional References
Please refer to the other materials (operator’s manual, parts catalog, engine technical material and Hitachi training
material etc.) in addition to this manual.
Manual Composition
This manual consists the Technical Manual, the Workshop Manual and the Engine Manual.
● Information included in the Technical Manual: Technical information needed for redelivery and delivery
• Operation and activation of all devices and systems, operational performance tests, and troubleshooting
procedures.
● Information included in the Workshop Manual: Technical information needed for maintenance and repair of the
machine
• Tools and devices needed for maintenance and repair, maintenance standards, and removal / installation and
assemble / disassemble procedures
● Information included in the Engine Manual: Technical information needed for redelivery and delivery and
maintenance and repair of the machine
• Operation and activation of all devices and systems, troubleshooting and assemble / disassemble procedures

TABLE OF CONTENTS:

Hitachi ZX 890LCH-7 890LCR-7 Hydraulic Excavator Operational Technical Manual PN:TOJBR41 –  PDF DOWNLOAD

Service Manual consists of the following separate Part No.
Technical Manual (Operational Principle) : Vol. No.TOJBR41-EN
Technical Manual (Troubleshooting) : Vol. No.TTJBR41-EN
Workshop Manual : Vol. No.WJBR41-EN
Engine Manual : Vol. No.ETJAQ51-EN, EWJAQ51-EN

TOJBR41-EN-00 1
INTRODUCTION 3
To The Reader 3
Additional References 3
Manual Composition 3
Page Number 3
Trademark 4
Safety Alert Symbol and Headline Notations 4
Units Used 4
SYMBOL AND ABBREVIATION 7
Symbol and Abbreviation 7
CONTRASTING LIST OF PART NAME 9
Contrasting List of Part Name between Technical Manual and Parts Catalog 9
SECTION AND GROUP CONTENTS 11
CONTENTS 13
GENERAL 21
Specifications 23
Specifications ZX890LCH-7, 890LCR-7 23
Working Ranges ZX890LCH-7, 890LCR-7 24
Component Layout 25
Main Component (Upperstructure) 25
Main Component (Undercarriage) 27
Main Component (Front Attachment) 27
Electrical System (Overview) 28
Electrical System (Rear Tray) 29
Electrical System (Switches) 30
Electrical System (Utility Space) 31
Electrical System (Around Battery) 32
Engine Oil Monitoring Sensor 33
Hydraulic Oil Monitoring Sensor 34
Engine 35
Aftertreatment Device 36
Pump Device 37
Control Valve 38
Signal Control Valve 38
Pilot Check Valve 39
Swing Device 40
Travel Device 40
4-Spool Solenoid Valve Unit (Control Valve Side) 40
4-Spool Solenoid Valve Unit (Hydraulic Oil Tank Side) 41
Expansion Tank 41
Air Cleaner 42
DEF Tank 42
DEF Supply Module 43
Electric Fuel Pump 43
Around Radiator 44
Around Oil Cooler 45
Shockless Valve 45
Radiator Fan Valve 46
Oil Cooler Fan Valve 46
Boom Upper Area 47
Arm Upper Area 47
Distribution Valve (Upperstructure) 48
Auto-Lubrication Device 48
Component Specifications 49
Specifications of Engine 49
Specifications of Engine Accessories 50
Specifications of Hydraulic Component 51
Specifications of Electrical Component 52
SYSTEM 55
Controller 57
Outline of Controller 57
CAN Circuit 57
Control System 59
Outline of Control System 59
Engine Control 59
Engine Control System Layout 60
Engine Protection Control 61
Engine Control Dial Control 63
ECO Control 65
Power Mode (ECO/PWR/HP Mode) Switch Control 67
Travel Speed Limit Control 69
ECO/PWR Mode Travel Speed Increase Control 71
Auto-Idle Control 73
Radiator Coolant Temperature Auto-Warming Up Control 75
Engine Speed Slow Down Control 77
One-Touch Idle Control (Option) 79
Pump Control 81
Pump Control System Layout 82
Pump Flow Rate Control 83
Engine Control Dial Output Control 85
Speed Sensing Control 87
Output Power Control 90
ECO/PWR Mode Control 92
Relief Flow Rate Decrease Control 94
Swing High Pressure Power Decrease Control 96
Overheat Prevention Control 98
Attachment Operation Pump Control (Option)100
Fan Pump Flow Rate Control (Air Conditioner Switch: OFF)102
Fan Pump Flow Rate Control (Air Conditioner Switch: ON)104
Pump and Valve Learning Control106
Pump Torque Restriction Control108
Valve Control (Standard)110
Valve Control (Standard) System Layout111
Pressure Rising Selection Control When Traveling112
Power Digging Control114
Auto-Power Lift Control116
Travel Motor Displacement Angle Control118
Boom Mode Selector Control120
Swing Flow Rate Control122
Arm 2 Flow Rate Control124
Bucket Flow Combiner Control126
Aftertreatment Device Manual Regeneration Control128
Aftertreatment Device Auto Regeneration Control130
Engine Protection Control at Low Temperature132
Radiator Fan and Oil Cooler Fan Reverse Rotation Control134
Arm Regenerative Cut Control135
Other Control138
Work Mode Control138
Auto Shut-Down Control139
Hydraulic Oil Overheat Alarm Control140
Engine Oil, Coolant Level Check Control141
Auto-Lubrication Control (Option)142
Breaker Alarm Control (Option)143
Travel Alarm Control (Option)144
Overload Alarm Control (Option)146
Engine System147
Outline of ECM System147
Fuel Injection Control148
Fuel Injection Amount Control149
Fuel Injection Timing Control152
Fuel Injection Rate Control154
Fuel Injection Pressure Control155
Fuel Injection Amount Correction Control157
EGR Control159
Preheating Control161
Variable Turbocharger Control162
Alarm Control163
Urea SCR System163
DEF Injection Control164
Start-Up Control165
DEF Defrosting Control166
DEF Thermal Control167
After-Run Control169
Engine Output Restriction Control (INDUCEMENT)170
Insufficient DEF Level171
Malfunction of Urea SCR System/Malfunction of EGR System171
Outline of Aftertreatment Device172
Operation of Aftertreatment Device173
Aftertreatment Device Regeneration Control175
Hydraulic System179
Outline of Hydraulic System179
Pilot Circuit of Hydraulic System179
Operation Control Circuit181
Pump Control Circuit (Refer to COMPONENT OPERATION/Pump Device)182
Aftertreatment Device Regeneration Control Circuit (Refer to SYSTEM/Control System)183
Bucket Flow Combiner Circuit (Refer to SYSTEM/Control System)184
Valve Control Circuit (Refer to COMPONENT OPERATION/Control Valve)185
Travel Motor Displacement Angle Control Circuit (Refer to COMPONENT OPERATION/Travel Device)188
Swing Parking Brake Release Circuit (Refer to COMPONENT OPERATION/Swing Device)190
Emergency Boom Lower Circuit (Refer to COMPONENT OPERATION/Others (Upperstructure))191
Main Circuit of Hydraulic System193
Neutral Circuit195
Flow Combiner Circuit196
Relief Circuit198
Combined Operation Circuit200
Flow Combiner Circuit202
Swing Flow Rate Control Circuit204
Arm Regenerative Cut Circuit206
Arm 1 Flow Rate Control Circuit208
Arm 2 Flow Rate Control Circuit210
Bucket Regenerative Cut Circuit212
Boom Lower Meter-In Cut Control214
Boom Cylinder Bottom Pressure: High (With the Front Attachment above the Ground)214
Boom Cylinder Bottom Pressure: Low (With Track Raised off the Ground)216
Radiator and Oil Cooler Fan Reverse Rotation Control Circuit218
Electrical System221
Outline of Electrical System221
Main Circuit of Electrical System221
Electric Power Circuit (Key Switch: OFF)221
CAN Circuit223
Accessory Circuit (Key Switch: ACC)224
Starting Circuit (Key Switch: START)225
Charging Circuit (Key Switch: ON)227
Alternator Operation228
Regulator Operation229
Surge Voltage Prevention Circuit229
Pilot Shut-Off Circuit (Key Switch: ON)230
Auto Shut-Down Circuit/Automatic Engine Stop Circuit at Low Temperature231
Engine Stop Circuit233
Emergency Stop Circuit234
Monitor Circuit of Electrical System236
Security Circuit237
Aerial Angle Circuit238
Control Lever Automatic Pilot Shut-Off Circuit238
Seat Belt Reminder Circuit239
Radio Circuit240
Air Conditioner Circuit241
Accessory Circuit242
Work Light Circuit (Work Light: ON)242
Work Light Circuit (Work Light, Work Light (Cab Upper), and Boom Light: ON)244
Wiper Circuit246
Washer Circuit248
Cab Light Circuit (Cab Light Switch: Door Interlocking Position (Key Switch: ON))250
Cab Light Circuit (Cab Light Switch: ON Position)251
TOJBR41-EN-00 0
COMPONENT OPERATION253
Pump Device257
Outline of Pump Device257
Outline of Main Pump258
Operational Principle of Main Pump258
Increasing and Decreasing of Main Pump Delivery Flow Rate259
Outline of Regulator (For Main Pump)259
Control by Pump Control Solenoid Valve (Minimum Flow Rate)260
Control by Pump Control Solenoid Valve (Increase of Flow Rate)261
Control by Pump Control Solenoid Valve (Decrease of Flow Rate)262
Outline of Pump Control Solenoid Valve263
Operation of Pump Control Solenoid Valve (When in Neutral)264
Operation of Pump Control Solenoid Valve (When Excited)264
Outline of Fan Pump265
Operational Principle of Fan Pump265
Increasing and Decreasing of Fan Pump Delivery Flow Rate266
Outline of Regulator (for Fan Pump)267
Control by Fan Pump Control Solenoid Valve (Minimum Flow Rate)268
Control by Fan Pump Control Solenoid Valve (Increase of Flow Rate)269
Control by Fan Pump Control Solenoid Valve (Decrease of Flow Rate)270
Outline of Fan Pump Control Solenoid Valve271
Operation of Fan Pump Control Solenoid Valve (When in Neutral)271
Operation of Fan Pump Control Solenoid Valve (When Excited)272
Outline of Pilot Pump273
Outline of Pump Delivery Pressure Sensor273
Outline of Pump Displacement Control Pressure Sensor274
Swing Device275
Outline of Swing Device275
Outline of Swing Reduction Gear275
Outline of Swing Motor276
Outline of Swing Parking Brake278
When Brake is Released of Swing Parking Brake278
When Brake is Applied of Swing Parking Brake278
Outline of Valve Unit279
Operation of Make-Up Valve279
Outline of Swing Relief Valve280
Low-Pressure Relief Operation (Shockless Function) of Swing Relief Valve280
High-Pressure Relief Operation (Overload Prevention) of Swing Relief Valve281
Control Valve283
Outline of Control Valve283
Components in Control Valve284
Main Circuit of Control Valve295
Pilot Operation Control Circuit of Control Valve296
External Pilot Pressure Circuit of Control Valve298
Operation of Flow Combiner Valve299
Outline of Main Relief Valve302
Relief Operation of Main Relief Valve302
Pressure Increasing Operation of Main Relief Valve303
Outline of Overload Relief Valve (With Make-Up Function)304
Relief Operation of Overload Relief Valve304
Make-Up Operation of Overload Relief Valve305
Outline of Boom Overload Relief Valve (Low Pressure)305
Relief Operation of Boom Overload Relief Valve (Low Pressure)306
Make-Up Operation of Boom Overload Relief Valve (Low Pressure)307
Outline of Regenerative Valve308
Operation of Boom Regenerative Valve308
Outline of Bucket Regenerative Valve310
Operation When Performing Bucket Regenerative Operation310
Operation When Performing Bucket Regenerative Cut Operation311
Operation When Performing Arm Regenerative Operation312
Operation When Performing Arm Regenerative Cut Operation314
Outline of Anti-Drift Valve317
Holding Operation of Anti-Drift Valve317
Releasing Operation of Anti-Drift Valve318
Outline of Flow Rate Control Valve318
Normal Operation of Flow Rate Control Valve319
Flow Rate Control Operation of Flow Rate Control Valve320
Outline of Boom Lower Meter-In Cut Valve322
Operation of Boom Lower Meter-In Cut Valve (With the Track off the Ground)324
Operation of Boom Lower Meter-In Cut Valve (With the Front Attachment above the Ground)326
Operation of Auxiliary Flow Combiner Valve (Auxiliary Flow Combiner Valve: OFF)329
Operation of Auxiliary Flow Combiner Valve (Auxiliary Flow Combiner Valve: ON)330
Outline of Pump 1 Bypass Shut-Out Valve and Pump 2 Bypass Shut-Out Valve331
Operation of Pump 1 Bypass Shut-Out Valve333
Operation of Pump 2 Bypass Shut-Out Valve335
Pilot Valve337
Outline of Pilot Valve337
Outline of Front Attachment/Swing Pilot Valve337
Outline of Travel Pilot Valve338
Outline of Auxiliary Pilot Valve338
Operation of Front Attachment/Swing and Travel Pilot Valves339
When Front Attachment/Swing and Travel Pilot Valves are in Neutral (Output Curve: A to B)340
During Metering or Decompressing of Front Attachment/Swing and Travel Pilot Valves (Output Curve: C to D)342
Full Stroke of Front Attachment/Swing and Travel Pilot Valves (Output Curve: E to F)344
Operation of Auxiliary Pilot Valve345
When Auxiliary Pilot Valve are in Neutral (Output Curve: A to B)345
During Metering or Decompressing of Auxiliary Pilot Valve (Output Curve: C to D)346
Outline of Shockless Function (Only Travel Pilot Valve)348
Operation of Shockless Function348
Travel Device351
Outline of Travel Device351
Outline of Travel Reduction Gear352
Outline of Travel Motor354
Operation of Travel Motor354
Outline of Parking Brake355
Operation of Parking Brake (When Parking Brake is Released)356
Operation of Parking Brake (When Parking Brake is Applied)357
Outline of Travel Brake Valve358
Operation of Counterbalance Valve (During Travel)359
Operation of Counterbalance Valve (When Descending a Slope)360
Outline of Travel Relief Valve362
Operation of Travel Relief Valve (During Relief)362
Operation of Travel Relief Valve (During Make-Up)362
Outline of Travel Mode Control364
Operation of Selecting Travel Mode (Slow Speed)364
Operation of Selecting Travel Mode (Fast Speed)364
Signal Control Valve367
Outline of Signal Control Valve367
Pilot Valve Side of Pilot Port367
Control Valve Side of Pilot Port368
Outline of Shuttle Valve369
Outline of Shockless Valve372
Operation of Shockless Valve (During Boom Raise Operation)372
Operation of Shockless Valve (During Boom Lower Operation or When Stopping Boom Raise Operation (Shock Reducing Operation))373
Operation of Flow Combiner Valve Control Spool375
Operation of Swing Parking Brake Release Spool376
Operation of Arm Flow Rate Control Valve Control Spool376
Others (Upperstructure)377
Outline of Pilot Shut-Off Solenoid Valve377
Pilot Shut-Off Lever: LOCK Position378
Pilot Shut-Off Lever: UNLOCK Position378
Outline of Solenoid Valve379
Outline of 4-Spool Solenoid Valve Unit (Control Valve Side)379
Outline of 4-Spool Solenoid Valve Unit (Hydraulic Oil Tank Side)380
Outline of Proportional Solenoid Valve381
Operation of Proportional Solenoid Valve (When in Neutral)381
Operation of Proportional Solenoid Valve (When Excited)381
Outline of Fan Motor382
Outline of Fan Valve382
Relief Operation of Fan Valve383
Make-Up Operation of Fan Valve384
Outline of Pilot Relief Valve386
Outline of Recirculation Valve387
Outline of Shockless Valve387
Operation of Shockless Valve388
Outline of Accumulator (Pilot Circuit)389
Outline of Distribution Valve390
Operation of Distribution Valve390
Others (Undercarriage)395
Outline of Swing Bearing395
Outline of Center Joint395
Outline of Track Adjuster396
SERVICE MANUAL REVISION REQUEST FORM399

S.M 1/2/25