Hitachi ZX350LC-5B ZX350LCN-5B Hydraulic Excavator Technical Operational Principle Manual
File Details:
Hitachi ZX350LC-5B ZX350LCN-5B Hydraulic Excavator Technical Operational Principle Manual
- Manual Language:English
- Pages: 448
- Size: 13.2 MB
- Format:PDF
- Downloadable:Yes
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Description:
Hitachi ZX350LC-5B ZX350LCN-5B 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, 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 ZX350LC-5B ZX350LCN-5B Hydraulic Excavator Technical Operational Principle Manual
TODDD-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........................................................................................ 12 Group 2 Component Layout.................................................................................. 13 Main Component........................................................................................ 13 Electrical System (Overview).......................................................................... 15 Electrical System (Rear Tray)......................................................................... 16 Electrical System (Switch Panel)...................................................................... 17 Electrical System (Utility Space)..................................................................... 18 Electrical System (Relays)............................................................................ 19 Engine................................................................................................ 20 Muffler Filter........................................................................................ 21 Pump Device........................................................................................... 22 Around Pump Device.................................................................................... 23 Control Valve......................................................................................... 24 Signal Control Valve.................................................................................. 24 Swing Device.......................................................................................... 26 Travel Device......................................................................................... 26 5-Spool Solenoid Valve Unit........................................................................... 27 2-Spool Solenoid Valve Unit (for Muffler Filter Regeneration Control)................................. 27 Layout of Attachment Spec. Parts...................................................................... 28 Group 3 Component Specifications.......................................................................... 33 Engine................................................................................................ 33 Engine Accessories.................................................................................... 37 Hydraulic Component................................................................................... 39 Electrical Component.................................................................................. 43 SECTION 2 SYSTEM.............................................................................................. 47 Group 1 Controller........................................................................................ 49 Outline............................................................................................... 49 CAN Circuit........................................................................................... 50 Group 2 Control System.................................................................................... 53 Outline............................................................................................... 53 Engine Control........................................................................................ 56 Pump Control.......................................................................................... 90 Valve Control (Standard)..............................................................................106 Valve Control (Optional)..............................................................................128 Other Control.........................................................................................136 Group 3 ECM System........................................................................................147 Outline...............................................................................................147 Fuel Injection Control................................................................................148 Fuel Injection Amount Correction Control..............................................................156 EGR Control...........................................................................................158 Preheating Control....................................................................................160 Alarm Control.........................................................................................161 Muffler Filter........................................................................................162 Operation.............................................................................................163 Muffler Filter Regenerative Control...................................................................164 Group 4 Hydraulic System..................................................................................167 Outline...............................................................................................167 Pilot Circuit.........................................................................................168 Main Circuit..........................................................................................180 Fan Circuit...........................................................................................202 Breaker/Pulverizer/Crusher Circuit (Optional).........................................................204 Group 5 Electrical System.................................................................................215 Outline...............................................................................................215 Main Circuit..........................................................................................216 Electric Power Circuit (Key Switch: OFF)..............................................................218 CAN Circuit...........................................................................................220 Accessory Circuit.....................................................................................222 Starting Circuit (Key Switch: START)..................................................................224 Charging Circuit (Key Switch: ON).....................................................................226 Surge Voltage Prevention Circuit......................................................................230 Pilot Shut-Off Circuit (Key Switch: ON)...............................................................232 Auto Shut-Down Circuit................................................................................234 Engine Stop Circuit...................................................................................236 Monitor Circuit.......................................................................................239 Security Circuit......................................................................................240 Radio Circuit.........................................................................................242 Air Conditioner Circuit...............................................................................242 Accessory Circuit.....................................................................................245 Work Light Circuit....................................................................................246 Wiper/Washer Circuit..................................................................................248 Cab Light Circuit.....................................................................................250 SECTION 3 COMPONENT OPERATION.................................................................................255 Group 1 Pump Device.......................................................................................257 Outline...............................................................................................257 Main Pump.............................................................................................258 Regulator.............................................................................................262 Solenoid Valve........................................................................................284 Pilot Pump............................................................................................286 Pump Delivery Pressure Sensor.........................................................................286 Pump Control Pressure Sensor..........................................................................286 Group 2 Swing Device......................................................................................287 Outline...............................................................................................287 Swing Reduction Gear..................................................................................288 Swing Motor...........................................................................................289 Swing Parking Brake...................................................................................290 Valve Unit............................................................................................292 Group 3 Control Valve.....................................................................................305 Outline...............................................................................................305 Hydraulic Circuit.....................................................................................328 Flow Combiner Valve...................................................................................334 Main Relief Valve.....................................................................................336 Overload Relief Valve (with Make-Up Function).........................................................340 Regenerative Valve....................................................................................344 Anti-Drift Valve......................................................................................354 Flow Rate Control Valve...............................................................................358 Digging Regenerative Valve............................................................................362 Boom Lower Meter-In Cut Valve.........................................................................364 Auxiliary Flow Combiner Valve and Bypass Shut-Out Valve...............................................366 Group 4 Pilot Valve.......................................................................................371 Outline...............................................................................................371 Operation (Front Attachment / Swing and Travel Pilot Valves)..........................................373 Operation (Auxiliary / Positioning Pilot Valve).......................................................381 Shockless Function (Only for Travel Pilot Valve)......................................................386 Group 5 Travel Device.....................................................................................387 Outline...............................................................................................387 Travel Reduction Gear.................................................................................388 Travel Motor..........................................................................................390 Parking Brake.........................................................................................392 Travel Brake Valve....................................................................................394 Overload Relief Valve.................................................................................398 Travel Mode Control...................................................................................400 Group 6 Signal Control Valve..............................................................................405 Outline...............................................................................................405 Pilot Port............................................................................................406 Shuttle Valve.........................................................................................411 Shockless Valve.......................................................................................414 Pump 1 Flow Rate Control Valve, Pump 2 Flow Rate Control Valve, and Pump 3 Flow Rate Control Valve....418 Flow Combiner Valve Control Spool, Swing Parking Brake Release Spool..................................420 Group 7 Others (Upperstructure)...........................................................................421 Pilot Shut-Off Solenoid Valve.........................................................................421 Solenoid Valve........................................................................................423 Fan Pump..............................................................................................427 Fan Motor.............................................................................................428 Fan Valve.............................................................................................429 Hose Rupture Valve....................................................................................432 Pilot Relief Valve....................................................................................438 Recirculation Valve (Option)..........................................................................439 Group 8 Others (Undercarriage)............................................................................441 Swing Bearing.........................................................................................441 Center Joint..........................................................................................442 Track Adjuster (Front Idler Integrated Type)..........................................................443 SERVICE MANUAL REVISION REQUEST FORM..........................................................................447
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]
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