Hitachi ZX250LC-6 ZX250LCN-6 Hydraulic Excavator Technical Operational Principle Manual (TODC150-EN-00)
File Details:
Hitachi ZX250LC-6 ZX250LCN-6 Hydraulic Excavator Technical Operational Principle Manual (TODC150-EN-00)
- Manual Language:English
- Downloadable:Yes
- Pages: 472
- Size: 19.6 MB
- Format:PDF
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Description:
Hitachi ZX250LC-6 ZX250LCN-6 Hydraulic Excavator Technical Operational Principle Manual (TODC150-EN-00)
- 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 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 ZX250LC-6 ZX250LCN-6 Hydraulic Excavator Technical Operational Principle Manual (TODC150-EN-00)
TODC150-EN-00................................................................................................. 1 CONTENTS...................................................................................................... 3 INTRODUCTION.................................................................................................. 9 SYMBOL AND ABBREVIATION....................................................................................... 11 SECTION AND GROUP CONTENTS.................................................................................... 13 SECTION 1 GENERAL............................................................................................. 15 Group 1 Specifications.................................................................................... 17 Specifications........................................................................................ 17 Working Ranges........................................................................................ 18 Group 2 Component Layout.................................................................................. 19 Main Component........................................................................................ 19 Electrical System (Overview).......................................................................... 21 Electrical System (Rear Tray)......................................................................... 22 Electrical System (Switch Panel)...................................................................... 23 Electrical System (Utility Space)..................................................................... 24 Electrical System (Relays)............................................................................ 25 Engine................................................................................................ 26 Aftertreatment Device................................................................................. 27 Pump Device........................................................................................... 28 Around Pump Device.................................................................................... 29 Control Valve......................................................................................... 30 Signal Control Valve.................................................................................. 30 Swing Device.......................................................................................... 32 Travel Device......................................................................................... 32 5-Spool Solenoid Valve Unit........................................................................... 33 2-Spool Solenoid Valve Unit (Aftertreatment Device Regeneration Control).............................. 33 DEF Tank.............................................................................................. 34 DEF Supply Module..................................................................................... 34 Layout of Attachment Spec. Parts...................................................................... 36 Group 3 Component Specifications.......................................................................... 41 Engine................................................................................................ 41 Engine Accessories.................................................................................... 45 Hydraulic Component................................................................................... 46 Electrical Component.................................................................................. 50 SECTION 2 SYSTEM.............................................................................................. 53 Group 1 Controller........................................................................................ 55 Outline............................................................................................... 55 CAN Circuit........................................................................................... 56 Group 2 Control System.................................................................................... 59 Outline............................................................................................... 59 Engine Control........................................................................................ 62 Pump Control.......................................................................................... 96 Valve Control (Standard)..............................................................................120 Valve Control (Optional)..............................................................................138 Other Control.........................................................................................148 Group 3 Engine System.....................................................................................159 ECM System............................................................................................159 Fuel Injection Control................................................................................160 Fuel Injection Amount Correction Control..............................................................168 EGR Control...........................................................................................170 Preheating Control....................................................................................172 Variable Turbocharger Control.........................................................................173 Alarm Control.........................................................................................174 Urea SCR System.......................................................................................175 Engine Output Restriction Control (INDUCEMENT)........................................................186 Aftertreatment Device.................................................................................190 Aftertreatment Device Regeneration Control............................................................192 Group 4 Hydraulic System..................................................................................195 Outline...............................................................................................195 Pilot Circuit.........................................................................................196 Main Circuit..........................................................................................208 Breaker/Pulverizer/Crusher Circuit (Optional).........................................................230 Group 5 Electrical System.................................................................................241 Outline...............................................................................................241 Main Circuit..........................................................................................242 Electric Power Circuit (Key Switch: OFF)..............................................................244 CAN Circuit...........................................................................................246 Accessory Circuit (Key Switch: ACC)...................................................................248 Starting Circuit (Key Switch: START)..................................................................250 Charging Circuit (Key Switch: ON).....................................................................252 Surge Voltage Prevention Circuit......................................................................256 Pilot Shut-Off Circuit (Key Switch: ON)...............................................................258 Auto Shut-Down Circuit/Automatic Engine Stop Circuit at Low Temperature...............................260 Engine Stop Circuit...................................................................................262 Monitor Circuit.......................................................................................265 Security Circuit......................................................................................266 Radio Circuit.........................................................................................268 Air Conditioner Circuit...............................................................................268 Accessory Circuit.....................................................................................271 Work Light Circuit....................................................................................272 Wiper/Washer Circuit..................................................................................274 Wiper Circuit.........................................................................................274 Cab Light Circuit.....................................................................................276 SECTION 3 COMPONENT OPERATION.................................................................................281 Group 1 Pump Device.......................................................................................283 Outline...............................................................................................283 Main Pump.............................................................................................284 Regulator.............................................................................................288 Solenoid Valve........................................................................................312 Pilot Pump............................................................................................314 Pump Delivery Pressure Sensor.........................................................................314 Pump Control Pressure Sensor..........................................................................314 Group 2 Swing Device......................................................................................315 Outline...............................................................................................315 Swing Reduction Gear..................................................................................316 Swing Motor...........................................................................................317 Swing Parking Brake...................................................................................318 Valve Unit............................................................................................320 Group 3 Control Valve.....................................................................................333 Outline...............................................................................................333 Hydraulic Circuit.....................................................................................356 Flow Combiner Valve...................................................................................362 Main Relief Valve.....................................................................................364 Overload Relief Valve (with Make-Up Function).........................................................368 Regenerative Valve....................................................................................372 Anti-Drift Valve......................................................................................382 Flow Rate Control Valve...............................................................................386 Digging Regenerative Valve............................................................................390 Boom Lower Meter-In Cut Valve.........................................................................392 Auxiliary Flow Combiner Valve and Bypass Shut-Out Valve...............................................394 Group 4 Pilot Valve.......................................................................................399 Outline...............................................................................................399 Operation (Front Attachment/Swing and Travel Pilot Valves)............................................401 Operation (Auxiliary, Positioning Pilot Valve)........................................................409 Shockless Function (Only for Travel Pilot Valve)......................................................414 Group 5 Travel Device.....................................................................................415 Outline...............................................................................................415 Travel Reduction Gear.................................................................................416 Travel Motor..........................................................................................418 Parking Brake.........................................................................................420 Travel Brake Valve....................................................................................422 Overload Relief Valve.................................................................................426 Travel Mode Control...................................................................................428 Group 6 Signal Control Valve..............................................................................433 Outline...............................................................................................433 Pilot Port............................................................................................434 Shuttle Valve.........................................................................................439 Shockless Valve.......................................................................................442 Pump 1 Flow Rate Control Valve, Pump 2 Flow Rate Control Valve, and Pump 3 Flow Rate Control Valve....446 Flow Combiner Valve Control Spool, Swing Parking Brake Release Spool..................................448 Group 7 Others (Upperstructure)...........................................................................449 Pilot Shut-Off Solenoid Valve.........................................................................449 Solenoid Valve........................................................................................451 Hose Rupture Valve....................................................................................456 Pilot Relief Valve....................................................................................462 Recirculation Valve ..................................................................................463 Group 8 Others (Undercarriage)............................................................................465 Swing Bearing.........................................................................................465 Centerjoint...........................................................................................466 Track Adjuster (Front Idler Integrated Type)..................................................................467 SERVICE MANUAL REVISION REQUEST FORM..........................................................................471
Please Note:
⦁ This is not a physical manual but a digital manual – meaning no physical copy will be couriered to you. The manual can be yours in the next 2 mins as once you make the payment, you will be directed to the download page IMMEDIATELY.
⦁ This is the same manual used by the dealers inorder to diagnose your vehicle of its faults.
⦁ Require some other service manual or have any queries: please WRITE to us at [email protected]
Ameer Arian –