Hitachi ZX300-5A ZX300LC-5A ZX300LCH-5A Hydraulic Excavator Operational Principle Manual
File Details:
Hitachi ZX300-5A ZX300LC-5A ZX300LCH-5A Hydraulic Excavator Operational Principle Manual
- Manual Language:English
- Pages: 700+
- Size:42.0 MB
- Format:PDF
- Downloadable:Yes
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Description:
Hitachi ZX300-5A ZX300LC-5A ZX300LCH-5A Hydraulic Excavator 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 ZX300-5A ZX300LC-5A ZX300LCH-5A Hydraulic Excavator Operational Principle Manual
TODDW90-EN-00.............................................................................................................................................................. 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)....................................................................................................................................... 14 Electrical System (Rear Tray)...................................................................................................................................... 15 Electrical System (Switch Panel)................................................................................................................................... 16 Electrical System (Around Air Cleaner)............................................................................................................................. 17 Electrical System (Relays, etc.)................................................................................................................................... 18 Components Related with Engine..................................................................................................................................... 19 Components Related with Pump Device................................................................................................................................ 20 Around Pump Device................................................................................................................................................. 21 Components Related with Control Valve.............................................................................................................................. 22 Components Related with Signal Control Valve....................................................................................................................... 22 Components Related with Swing Device............................................................................................................................... 24 Travel Device...................................................................................................................................................... 24 3-Spool Solenoid Valve Unit........................................................................................................................................ 25 Layout of Attachment Spec. Parts................................................................................................................................... 26 Control Valve Side of Hydraulic Oil Tank........................................................................................................................... 28 Group 3 Component Specifications....................................................................................................................................... 31 Engine............................................................................................................................................................. 31 Engine Accessories................................................................................................................................................. 35 Hydraulic Component................................................................................................................................................ 36 Electrical Component............................................................................................................................................... 40 SECTION 2 SYSTEM........................................................................................................................................................... 43 Group 1 Controller..................................................................................................................................................... 45 Outline............................................................................................................................................................ 45 CAN Circuit........................................................................................................................................................ 46 Group 2 Control System................................................................................................................................................. 49 Outline............................................................................................................................................................ 49 Engine Control..................................................................................................................................................... 52 Pump Control....................................................................................................................................................... 84 Valve Control (Standard)........................................................................................................................................... 96 Valve Control (Option).............................................................................................................................................108 Other Control......................................................................................................................................................118 Group 3 ECM System.....................................................................................................................................................127 Outline............................................................................................................................................................127 Fuel Injection Control.............................................................................................................................................128 Fuel Injection Amount Correction Control...........................................................................................................................136 EGR Control........................................................................................................................................................138 Preheating Control.................................................................................................................................................140 Alarm Control......................................................................................................................................................141 Group 4 Hydraulic System...............................................................................................................................................143 Outline............................................................................................................................................................143 Pilot Circuit......................................................................................................................................................144 Main Circuit.......................................................................................................................................................154 Breaker/Pulverizer/Crusher Circuit (Option)........................................................................................................................170 Group 5 Electrical System..............................................................................................................................................181 Outline............................................................................................................................................................181 Main Circuit.......................................................................................................................................................182 Electric Power Circuit (Key Switch: OFF)...........................................................................................................................184 CAN Circuit........................................................................................................................................................186 Accessory Circuit..................................................................................................................................................188 Starting Circuit (Key Switch: START)...............................................................................................................................190 Charging Circuit (Key Switch: ON)..................................................................................................................................192 Surge Voltage Prevention Circuit...................................................................................................................................196 Pilot Shut-Off Circuit (Key switch: ON)............................................................................................................................198 Auto Shut-Down Circuit/Automatic Engine Stop Circuit at Low Temperature............................................................................................200 Engine Stop Circuit................................................................................................................................................202 Monitor Circuit....................................................................................................................................................205 Security Circuit...................................................................................................................................................206 Radio Circuit......................................................................................................................................................208 Air Conditioner Circuit............................................................................................................................................208 Accessory Circuit..................................................................................................................................................211 Work Light Circuit.................................................................................................................................................212 Wiper/Washer Circuit...............................................................................................................................................214 Cab Light Circuit..................................................................................................................................................216 SECTION 3 COMPONENT OPERATION..............................................................................................................................................221 Group 1 Pump Device....................................................................................................................................................223 Outline............................................................................................................................................................223 Main Pump..........................................................................................................................................................224 Regulator..........................................................................................................................................................228 Solenoid Valve.....................................................................................................................................................246 Pilot Pump.........................................................................................................................................................248 Pump Delivery Pressure Sensor......................................................................................................................................248 Pump Control Pressure Sensor.......................................................................................................................................248 Group 2 Swing Device...................................................................................................................................................249 Outline............................................................................................................................................................249 Swing Reduction Gear...............................................................................................................................................250 Swing Motor........................................................................................................................................................251 Swing Parking Brake................................................................................................................................................252 Valve Unit.........................................................................................................................................................254 Group 3 Control Valve..................................................................................................................................................257 Outline............................................................................................................................................................257 Hydraulic Circuit..................................................................................................................................................278 Flow Combiner Valve................................................................................................................................................284 Main Relief Valve..................................................................................................................................................286 Overload Relief Valve (with Make-Up Function)......................................................................................................................290 Regenerative Valve.................................................................................................................................................294 Anti-Drift Valve...................................................................................................................................................298 Flow Rate Control Valve............................................................................................................................................302 Digging Regenerative Valve.........................................................................................................................................306 Boom Lower Meter-In Cut Valve......................................................................................................................................308 Auxiliary Flow Combiner Valve and Bypass Shut-Out Valve............................................................................................................310 Group 4 Pilot Valve....................................................................................................................................................315 Outline............................................................................................................................................................315 Operation (Front Attachment/Swing and Travel Pilot Valves).........................................................................................................317 Operation (Auxiliary Pilot Valve)..................................................................................................................................325 Shockless Function (Only for Travel Pilot Valve)...................................................................................................................330 Group 5 Travel Device..................................................................................................................................................331 Outline............................................................................................................................................................331 Travel Reduction Gear..............................................................................................................................................332 Travel Motor.......................................................................................................................................................334 Parking Brake......................................................................................................................................................336 Travel Brake Valve.................................................................................................................................................338 Overload Relief Valve..............................................................................................................................................342 Travel Mode Control................................................................................................................................................344 Group 6 Signal Control Valve...........................................................................................................................................349 Outline............................................................................................................................................................349 Pilot Port.........................................................................................................................................................350 Shuttle Valve......................................................................................................................................................355 Shockless Valve....................................................................................................................................................358 Pump 1 and 2 Flow Rate Control Valve...............................................................................................................................362 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....364 Group 7 Others (Upperstructure)........................................................................................................................................367 Pilot Shut-Off Solenoid Valve......................................................................................................................................367 Solenoid Valve.....................................................................................................................................................369 Pilot Relief Valve.................................................................................................................................................373 Recirculation Valve (Option).......................................................................................................................................374 Group 8 Others (Undercarriage).........................................................................................................................................375 Swing Bearing......................................................................................................................................................375 Centerjoint........................................................................................................................................................376 Track Adjuster (Front Idler Integrated Type).......................................................................................................................377 SERVICE MANUAL REVISION REQUEST FORM.......................................................................................................................................381
Please Note:
⦁ This is the SAME exact manual used by your dealers to fix your vehicle.
⦁ The same can be yours in the next 2-3 mins as you will be directed to the download page immediately after paying for the manual.
⦁ Any queries / doubts regarding your purchase, please feel free to contact [email protected]