Hitachi ZX470-5B ZX470LC-5B ZX470H-5B ZX470LCH-5B ZX470R-5B ZX470LCR-5B ZX520LCH-5B Hydraulic Excavator Technical Operational Principle Manual (TOJAA-EN-01)
File Details:
Hitachi ZX470-5B ZX470LC-5B ZX470H-5B ZX470LCH-5B ZX470R-5B ZX470LCR-5B ZX520LCH-5B Hydraulic Excavator Technical Operational Principle Manual (TOJAA-EN-01)
- Manual Language:English
- Pages: 440
- Size: 8.63 MB
- Format:PDF
- Downloadable:Yes
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Description:
Hitachi ZX470-5B ZX470LC-5B ZX470H-5B ZX470LCH-5B ZX470R-5B ZX470LCR-5B ZX520LCH-5B Hydraulic Excavator Technical Operational Principle Manual (TOJAA-EN-01)
TO THE READER
• This manual is written for an experienced technician to provide technical information needed to maintain and repair this machine.
• 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 materials listed below in addition to this manual.
• The Operator’s Manual
• The Parts Catalog
• Operation Manual of the Engine
• Parts Catalog of the Engine
• Hitachi Training Material
MANUAL COMPOSITION
• This manual consists of three portions: the Technical Manual (Operational Principle), the Technical Manual (Troubleshooting) and the Workshop Manual.
• Information included in the Technical Manual (Operational Principle): technical information needed for redeliver and delivery, operation and activation of all devices and systems.
• Information included in the Technical Manual (Troubleshooting): technical information needed for 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 ZX470-5B ZX470LC-5B ZX470H-5B ZX470LCH-5B ZX470R-5B ZX470LCR-5B ZX520LCH-5B Hydraulic Excavator Technical Operational Principle Manual (TOJAA-EN-01)
TOJAA-EN-01................................................................................................................ 1 INTRODUCTION............................................................................................................... 3 SYMBOL AND ABBREVIATION.................................................................................................... 5 SECTION AND GROUP CONTENTS................................................................................................. 7 SECTION 1 GENERAL.......................................................................................................... 9 Group 1 Specifications................................................................................................. 11 Specifications..................................................................................................... 11 Working Ranges..................................................................................................... 15 Group 2 Component Layout............................................................................................... 19 Main Component..................................................................................................... 19 Electrical System (Overview)....................................................................................... 21 Electrical System (Rear Tray)...................................................................................... 22 Electrical System (Switch Panel)................................................................................... 23 Electrical System (Cab Behind Side)................................................................................ 24 Engine 1........................................................................................................... 26 Engine 2........................................................................................................... 27 Muffler Filter..................................................................................................... 28 Pump Device........................................................................................................ 29 Control Valve...................................................................................................... 30 Check Valve........................................................................................................ 32 Signal Control Valve............................................................................................... 32 4-Spool Solenoid Valve Unit........................................................................................ 35 2-Spool Solenoid Valve Unit........................................................................................ 35 Layout of Attachment Spec. Parts (Hydraulic System)................................................................ 36 Group 3 Component Specifications....................................................................................... 41 Engine............................................................................................................. 41 Engine Accessories................................................................................................. 45 Hydraulic Component................................................................................................ 47 Electrical Component............................................................................................... 51 SECTION 2 SYSTEM........................................................................................................... 55 Group 1 Controller..................................................................................................... 57 Outline............................................................................................................ 57 CAN Circuit........................................................................................................ 58 Group 2 Control System................................................................................................. 61 Outline............................................................................................................ 61 Engine Control..................................................................................................... 64 Pump Control....................................................................................................... 92 Valve Control......................................................................................................118 Other Control......................................................................................................150 Group 3 ECM System.....................................................................................................163 Outline............................................................................................................163 Fuel Injection Control.............................................................................................164 Fuel Injection Amount Correction Control...........................................................................172 EGR Control........................................................................................................174 Preheating Control.................................................................................................176 Alarm Control......................................................................................................177 Muffler Filter.....................................................................................................178 Operation..........................................................................................................179 Muffler Filter Regenerative Control................................................................................180 Fuel Bleeding Air Control..........................................................................................182 Group 4 Hydraulic System...............................................................................................183 Outline............................................................................................................183 Pilot Circuit......................................................................................................184 Main Circuit.......................................................................................................200 Counterweight Removal / Installation Circuit (Optional)............................................................222 Breaker/Pulverizer/Crusher Circuit (Optional)......................................................................224 Oil Cooler Fan Reverse Rotation Control Circuit (Optional).........................................................232 Group 5 Electrical System..............................................................................................233 Outline............................................................................................................233 Main Circuit.......................................................................................................234 Electric Power Circuit (Key Switch: OFF)...........................................................................236 CAN Circuit........................................................................................................238 Accessory Circuit..................................................................................................240 Starting Circuit (Key Switch: START)...............................................................................242 Charging Circuit (Key Switch: ON)..................................................................................244 Surge Voltage Prevention Circuit...................................................................................248 Pilot Shut-Off Circuit (Key Switch: ON)............................................................................250 Auto Shut-Down Circuit.............................................................................................252 Engine Stop Circuit................................................................................................254 Monitor Circuit....................................................................................................257 Security Circuit...................................................................................................258 Radio Circuit......................................................................................................260 Air Conditioner Circuit............................................................................................260 Accessory Circuit..................................................................................................263 Work Light Circuit.................................................................................................264 Wiper/Washer Circuit...............................................................................................268 Cab Light Circuit..................................................................................................270 SECTION 3 COMPONENT OPERATION..............................................................................................275 Group 1 Pump Device....................................................................................................277 Outline............................................................................................................277 Main Pump..........................................................................................................278 Regulator..........................................................................................................280 Solenoid Valve.....................................................................................................288 Fan Pump...........................................................................................................290 Power Control (Fan Pump)...........................................................................................292 Flow Rate Control (Fan Pump).......................................................................................293 Pilot Pump.........................................................................................................294 Pump Delivery Pressure Sensor......................................................................................294 Pump Control Pressure Sensor.......................................................................................294 Group 2 Swing Device...................................................................................................295 Outline............................................................................................................295 Swing Reduction Gear...............................................................................................296 Swing Motor........................................................................................................297 Swing Parking Brake................................................................................................298 Valve Unit.........................................................................................................300 Group 3 Control Valve..................................................................................................303 Outline............................................................................................................303 Hydraulic Circuit..................................................................................................320 Flow Combiner Valve................................................................................................326 Main Relief Valve..................................................................................................328 Overload Relief Valve (with Make-Up Function)......................................................................332 Boom Overload Relief Valve (Low Pressure)..........................................................................338 Regenerative Valve.................................................................................................340 Anti-Drift Valve...................................................................................................344 Flow Rate Control Valve............................................................................................348 Boom Lower Meter-In Cut Valve......................................................................................356 Bypass Shut-Out Valve..............................................................................................358 Auxiliary Flow Combiner Valve......................................................................................360 Group 4 Pilot Valve....................................................................................................363 Outline............................................................................................................363 Operation (Front Attachment / Swing and Travel Pilot Valves).......................................................365 Operation (Auxiliary / Counterweight Removal and Installation Pilot Valve).........................................373 Shockless Function (Only for Travel Pilot Valve)...................................................................378 Group 5 Travel Device..................................................................................................379 Outline............................................................................................................379 Travel Reduction Gear..............................................................................................380 Travel Motor.......................................................................................................382 Parking Brake......................................................................................................384 Travel Brake Valve.................................................................................................386 Overload Relief Valve..............................................................................................390 Travel Mode Control................................................................................................392 Group 6 Signal Control Valve...........................................................................................397 Outline............................................................................................................397 Pilot Port.........................................................................................................398 Shuttle Valve......................................................................................................403 Shockless Valve....................................................................................................406 Pump 1 Flow Rate Control Valve, Pump 2 Flow Rate Control Valve.....................................................410 Arm Flow Rate Control Valve Control Spool, Flow Combiner Valve Control Spool, Swing Parking Brake Release Spool....412 Group 7 Others (Upperstructure)........................................................................................413 Pilot Shut-Off Solenoid Valve......................................................................................413 Solenoid Valve.....................................................................................................415 Fan Motor..........................................................................................................418 Fan Valve..........................................................................................................419 Pilot Relief Valve.................................................................................................422 Shockless Valve....................................................................................................423 Accumulator........................................................................................................424 Distribution Valve.................................................................................................425 Hose Rupture Valve (Optional)......................................................................................428 Group 8 Others (Undercarriage).........................................................................................433 Swing Bearing......................................................................................................433 Center Joint.......................................................................................................434 Track Adjuster.....................................................................................................435 SERVICE MANUAL REVISION REQUEST FORM.......................................................................................439
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.