Hitachi ZX220LC-GI Hydraulic Excavator Technical Operational Principle Manual
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Hitachi ZX220LC-GI Hydraulic Excavator Technical Operational Principle Manual
- Manual Language:English
- Pages: 317
- Size: 12.2 MB
- Downloadable:Yes
- Format:PDF
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Description:
Hitachi ZX220LC-GI Hydraulic Excavator Technical Operational Principle Manual
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 and the Workshop 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.
Table Of Contents:
Hitachi ZX220LC-GI Hydraulic Excavator Technical Operational Principle Manual
TODCR-EN-00.................................................................................................................................................................... 1 INTRODUCTION............................................................................................................................................................... 3 To The Reader.......................................................................................................................................................... 3 Additional References.................................................................................................................................................. 3 Manual Composition..................................................................................................................................................... 3 Page Number............................................................................................................................................................ 3 Safety Alert Symbol and Headline Notations............................................................................................................................. 4 Units Used............................................................................................................................................................. 4 SYMBOL AND ABBREVIATION.................................................................................................................................................... 5 SECTION AND GROUP CONTENTS................................................................................................................................................. 7 SECTION 1 GENERAL.......................................................................................................................................................... 9 Group 1 Specification.................................................................................................................................................. 11 Specifications..................................................................................................................................................... 11 Working Ranges (Grouser shoe)...................................................................................................................................... 12 Group 2 Component Layout............................................................................................................................................... 13 Main Component..................................................................................................................................................... 13 Electrical System (Overview)....................................................................................................................................... 14 Engine............................................................................................................................................................. 15 Electrical System (In Cab)......................................................................................................................................... 15 Electrical System (Rear Tray)...................................................................................................................................... 16 Electrical System (Monitors)....................................................................................................................................... 17 Electrical System (Switch Panel)................................................................................................................................... 18 Electrical System (Around Air Cleaner)............................................................................................................................. 19 Electrical System (Relays)......................................................................................................................................... 20 Pump Device........................................................................................................................................................ 21 Control Valve...................................................................................................................................................... 22 Signal Control Valve............................................................................................................................................... 22 Swing Device....................................................................................................................................................... 24 Travel Device...................................................................................................................................................... 24 3-Spool Solenoid Valve Unit........................................................................................................................................ 25 Layout of Attachment Spec. Parts................................................................................................................................... 26 Group 3 Component Specifications....................................................................................................................................... 29 Engine............................................................................................................................................................. 29 Engine Accessories................................................................................................................................................. 33 Hydraulic Component................................................................................................................................................ 34 Electrical Component............................................................................................................................................... 38 SECTION 2 SYSTEM........................................................................................................................................................... 41 Group 1 Controller..................................................................................................................................................... 43 Outline............................................................................................................................................................ 43 CAN (Network Provided for Machine)................................................................................................................................. 44 Group 2 Control System................................................................................................................................................. 47 Outline............................................................................................................................................................ 47 Engine Control..................................................................................................................................................... 50 Pump Control....................................................................................................................................................... 72 Valve Control...................................................................................................................................................... 82 Other Control...................................................................................................................................................... 94 Group 3 Hydraulic System............................................................................................................................................... 99 Outline............................................................................................................................................................ 99 Pilot Circuit......................................................................................................................................................100 Main Circuit.......................................................................................................................................................110 Group 4 Electrical System..............................................................................................................................................123 Outline............................................................................................................................................................123 Main Circuit.......................................................................................................................................................124 Electric Power Circuit (Key Switch: OFF)...........................................................................................................................126 CAN Circuit........................................................................................................................................................128 Accessory Circuit..................................................................................................................................................130 Preheating Circuit (Key Switch: ON, START).........................................................................................................................132 Starting Circuit (Key Switch: START)...............................................................................................................................134 Charging Circuit (Key Switch: ON)..................................................................................................................................138 Surge Voltage Prevention Circuit...................................................................................................................................142 Pilot Shut-Off Circuit (Key switch: ON)............................................................................................................................144 Engine Stop Circuit................................................................................................................................................146 Accessory Circuit..................................................................................................................................................149 Work Light Circuit.................................................................................................................................................150 Wiper/Washer Circuit...............................................................................................................................................152 Cab Light Circuit..................................................................................................................................................154 SECTION 3 COMPONENT OPERATION..............................................................................................................................................159 Group 1 Pump Device....................................................................................................................................................161 Outline............................................................................................................................................................161 Main Pump..........................................................................................................................................................162 Regulator..........................................................................................................................................................166 Solenoid Valve.....................................................................................................................................................184 Pilot Pump.........................................................................................................................................................186 Pump Delivery Pressure Sensor......................................................................................................................................186 Pump Control Pressure Sensor.......................................................................................................................................186 N Sensor (Engine Speed Sensor).....................................................................................................................................187 Group 2 Swing Device...................................................................................................................................................189 Outline............................................................................................................................................................189 Swing Reduction Gear...............................................................................................................................................190 Swing Motor........................................................................................................................................................191 Swing Parking Brake................................................................................................................................................192 Valve Unit.........................................................................................................................................................194 Group 3 Control Valve..................................................................................................................................................197 Outline............................................................................................................................................................197 Hydraulic Circuit..................................................................................................................................................218 Flow Combiner Valve................................................................................................................................................224 Main Relief Valve..................................................................................................................................................226 Overload Relief Valve (with Make-Up Function)......................................................................................................................230 Regenerative Valve.................................................................................................................................................234 Anti-Drift Valve...................................................................................................................................................238 Flow Rate Control Valve............................................................................................................................................242 Digging Regenerative Valve.........................................................................................................................................246 Boom Lower Meter-In Cut Valve......................................................................................................................................248 Bypass Shut-Out Valve..............................................................................................................................................250 Group 4 Pilot Valve....................................................................................................................................................253 Outline............................................................................................................................................................253 Operation (Front Attachment / Swing and Travel Pilot Valves).......................................................................................................255 Operation (Auxiliary Pilot Valve)..................................................................................................................................263 Shockless Function (Only for Travel Pilot Valve)...................................................................................................................268 Group 5 Travel Device..................................................................................................................................................269 Outline............................................................................................................................................................269 Travel Reduction Gear..............................................................................................................................................270 Travel Motor.......................................................................................................................................................272 Parking Brake......................................................................................................................................................274 Travel Brake Valve.................................................................................................................................................276 Overload Relief Valve..............................................................................................................................................280 Travel Mode Control................................................................................................................................................282 Group 6 Signal Control Valve...........................................................................................................................................287 Outline............................................................................................................................................................287 Pilot Port.........................................................................................................................................................288 Shuttle Valve......................................................................................................................................................293 Shockless Valve....................................................................................................................................................296 Pump 1 and 2 Flow Rate Control Valve...............................................................................................................................300 Bucket Flow Rate Control Valve Control Spool, Flow Combiner Valve Control Spool, Swing Parking Brake Release Spool, Arm 1 Flow Rate Control Valve Control Spool....302 Group 7 Others (Upperstructure)........................................................................................................................................305 Pilot Shut-Off Solenoid Valve......................................................................................................................................305 Solenoid Valve.....................................................................................................................................................307 Pilot Relief Valve.................................................................................................................................................310 EC Motor...........................................................................................................................................................310 Group 8 Others (Undercarriage).........................................................................................................................................311 Swing Bearing......................................................................................................................................................311 Center Joint.......................................................................................................................................................312 Track Adjuster (Front Idler Integrated Type).......................................................................................................................313
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.