Hitachi EX1200-5C Excavator Technical Operational Principle Manual (T018EE-00)
File Details:
Hitachi EX1200-5C Excavator Technical Operational Principle Manual (T018EE-00)
- Manual Language:English
- Pages: 246
- Size: 5.08 MB
- Downloadable:Yes
- Format:PDF
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Description:
Hitachi EX1200-5C Excavator Technical Operational Principle Manual (T018EE-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 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 redelivery 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 EX1200-5C Excavator Technical Operational Principle Manual (T018EE-00)
COVER......................................................................................... 1 INTRODUCTION.................................................................................. 2 ALL CONTENTS.................................................................................. 4 SECTION 1 GENERAL......................................................................... 6 GROUP 1 SPECIFICATIONS................................................................ 8 SPECIFICATIONS.................................................................... 8 WORKING RANGE (BACKHOE)........................................................... 10 WORKING RANGE (BE BACKHOE)........................................................ 11 WORKING RANGE (LOADING SHOVEL).................................................... 12 ENGINE............................................................................ 13 ENGINE ACCESSORIES................................................................ 16 HYDRAULIC DEVICES................................................................. 16 ELECTRICAL EQUIPMENT.............................................................. 19 GROUP 2 COMPONENT LAYOUT.............................................................. 22 MAIN COMPONENTS................................................................... 22 ELECTRICAL SYSTEM COMPONENTS (1).................................................. 23 ELECTRICAL SYSTEM COMPONENTS (2).................................................. 24 ELECTRICAL SYSTEM COMPONENTS (3).................................................. 29 ELECTRICAL SYSTEM COMPONENTS (4).................................................. 30 ON AND AROUND PUMPS............................................................... 31 OTHERS............................................................................ 32 SECTION 2 SYSTEM.......................................................................... 36 GROUP 1 CONTROL SYSTEM................................................................ 38 OUTLINE........................................................................... 38 ENGINE CONTROL.................................................................... 39 PUMP CONTROL...................................................................... 51 VALVE CONTROL..................................................................... 57 OIL COOLER FAN MOTOR CONTROL...................................................... 65 AUTO-LUBRICATION CONTROL.......................................................... 67 GROUP 2 HYDRAULIC SYSTEM.............................................................. 70 OUTLINE........................................................................... 70 PILOT CIRCUIT..................................................................... 71 MAIN CIRCUIT...................................................................... 89 PUMP TRANSMISSION OIL COOLING CIRCUIT.............................................117 OIL COOLER FAN MOTOR CIRCUIT......................................................117 GROUP 3 ELECTRICAL SYSTEM.............................................................118 OUTLINE...........................................................................118 POWER SOURCE CIRCUIT..............................................................119 BULB CHECK CIRCUIT................................................................120 ENGINE START CIRCUIT..............................................................121 CHARGING CIRCUIT (KEY SWITCH: ON).................................................125 ACCESSORY CIRCUIT.................................................................127 SURGE VOLTAGE PREVENTION CIRCUIT..................................................129 SECTION 3 COMPONENT OPERATION.............................................................134 GROUP 1 PUMP DEVICE...................................................................136 OUTLINE...........................................................................136 MAIN PUMP, OIL COOLER FAN MOTOR DRIVE PUMP........................................137 REGULATORS........................................................................140 3-UNIT PUMP.......................................................................161 GROUP 2 SWING DEVICE..................................................................162 OUTLINE...........................................................................162 SWING MOTOR.......................................................................163 VALVE UNIT........................................................................165 SWING PARKING BRAKE...............................................................167 SWING REDUCTION GEAR..............................................................168 GROUP 3 CONTROL VALVE.................................................................170 OUTLINE...........................................................................170 HYDRAULIC CIRCUIT.................................................................179 FLOW COMBINER VALVE...............................................................181 MAIN RELIEF VALVE.................................................................183 OVERLOAD RELIEF VALVE.............................................................184 MAKE-UP VALVE.....................................................................184 HOLDING VALVE.....................................................................185 ARM REGENERATIVE VALVE............................................................187 BOOM OVERLOAD RELIEF PRESSURE SWITCH VALVE........................................189 GROUP 4 PILOT VALVE...................................................................192 OUTLINE...........................................................................192 OPERATION.........................................................................193 GROUP 5 TRAVEL DEVICE.................................................................200 OUTLINE...........................................................................200 TRAVEL REDUCTION GEAR.............................................................201 TRAVEL MOTOR......................................................................202 TRAVEL BRAKE VALVE................................................................204 TRAVEL MOTOR DISPLACEMENT ANGLE CHANGE............................................209 PARKING BRAKE.....................................................................211 GROUP 6 SIGNAL CONTROL VALVE..........................................................214 OUTLINE...........................................................................214 PILOT PORT........................................................................215 SHUTTLE VALVE.....................................................................219 SHOCKLESS VALVE...................................................................223 PUMP 1 AND 2 FLOW RATE CONTROL VALVE.............................................227 ARM FLOW RATE CONTROL VALVE, FLOW COMBINER VALVE CONTROL SPOOL, PRIORITY VALVE....229 GROUP 7 OTHERS(UPPERSTRUCTURE)........................................................230 PILOT SHUT-OFF VALVE..............................................................230 SHOCKLESS VALVE...................................................................231 SOLENOID VALVE....................................................................235 OIL COOLER FAN MOTOR..............................................................237 ACCUMULATOR.......................................................................238 AUTO-LUBRICATION SYSTEM...........................................................239 GROUP 8 OTHERS(UNDERCARRIAGE).........................................................240 SWING BEARING.....................................................................240 CENTER JOINT......................................................................241 TRACK ADJUSTER....................................................................242 REVISION REQUEST FORM.....................................................................246
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