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Fiat Hitachi Excavator EX255 Operational Principle Technical Manual – PDF DOWNLOAD
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Fiat Hitachi Excavator EX255 Operational Principle Technical Manual – PDF DOWNLOAD
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Description
Fiat Hitachi Excavator EX255 Operational Principle Technical Manual – PDF DOWNLOAD
FILE DETAILS:
Fiat Hitachi Excavator EX255 Operational Principle Technical Manual – PDF DOWNLOAD
Language : English
Pages : 126
Downloadable : Yes
File Type : PDF
DESCRIPTION:
Fiat Hitachi Excavator EX255 Operational Principle Technical Manual – PDF DOWNLOAD
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 information concerning the service procedures.
– If you have any questions or comments, or if you found any errors regarding the contents of this manual, please contact
FOLLOW SAFETY PRECAUTIONS
• Carefully read and observe all safety signs on the machine and read all safety precautions in this Manual.
• Safety signs should be installed, maintained, and replaced when necessary
If a safety sign or this Manual are damaged or missing, obtain a replacement from your FIATHITACHI Dealer in the same way you order a spare part (be sure to detail machine model and serial number upon ordering).
Learn how to operate the machine and its controls correctly and safely. • Allow only trained, qualified, authorised personnel to operate the machine.
• Keep the machine in proper working conditions. – Unauthorised changes to the machine may impair function and/or safety and affect machine life.
• Safety messages in this Chapter “SAFETY PRECAUTIONS”, are intended to illustrate basic safety procedures of the machine. However, it is impossible for these safety messages to cover every hazardous situation you may encounter.
If you have any doubts, consult your direct supervisor prior to operating or servicing the machine
IMAGES PREVIEW OF THE MANUAL:
TABLE OF CONTENTS:
Fiat Hitachi Excavator EX255 Operational Principle Technical Manual – PDF DOWNLOAD
OPERATIONAL PRINCIPLE............................................. 1 INTRODUCTION...................................................... 2 SECTION AND GROUP CONTENTS........................................ 4 SECTION 1 - GENERAL........................................... 4 GROUP 1 - Specification................................... 5 EXCAVATOR DIMENSIONS (Monoblock version).............. 6 EXCAVATOR DIMENSIONS (Triple articulation version).... 7 EXCAVATOR PERFORMANCE................................. 8 ENGINE................................................ 8 ENGINE ACCESSORY...................................... 8 HYDRAULIC DEVICES..................................... 9 ELECTRICAL EQUIPMENT.................................. 10 GROUP 2 - Component layout................................ 5 MAIN COMPONENTS....................................... 12 ELECTRICAL SYSTEM (Overall system).................... 13 ELECTRICAL SYSTEM (Monitor and Switch panels)......... 14 ELECTRICAL SYSTEM (Relays, Diodes, etc.).............. 15 ELECTRICAL SYSTEM (Fuses)............................. 16 PUMP AND RELATED PARTS................................ 17 OTHER COMPONENTS...................................... 18 SECTION 2 - SYSTEM............................................ 4 GROUP 1 - Control system.................................. 20 OUTLINE............................................... 21 ENGINE CONTROL........................................ 22 PUMP CONTROL.......................................... 28 VALVE CONTROL......................................... 30 OTHER CONTROL FUNCTION................................ 34 GROUP 2 - Hydraulic system................................ 20 MAIN CIRCUIT.......................................... 35 PILOT CIRCUIT......................................... 36 NEUTRAL CIRCUIT....................................... 37 SINGLE ACTUATOR OPERATION............................. 37 COMBINED OPERATION.................................... 38 GROUP 3 - Electrical system............................... 20 OUTLINE............................................... 41 ELECTRIC POWER CIRCUIT (Key switch: OFF).............. 42 BULB CHECK CIRCUIT.................................... 43 PREHEAT CIRCUIT....................................... 44 STARTING CIRCUIT...................................... 46 CHARGING CIRCUIT...................................... 48 SURGE VOLTAGE PREVENTION CIRCUIT...................... 49 ACCESSORY CIRCUIT..................................... 50 ENGINE STOP CIRCUIT................................... 51 ENGINE EMERGENCY STOP................................. 52 SECTION 3 - COMPONENT OPERATION............................... 4 GROUP 1 - Pump device..................................... 54 OUTLINE............................................... 55 MAIN PUMP............................................. 56 REGULATOR............................................. 59 PILOT PUMP............................................ 67 N SENSOR (ENGINE SPEED SENSOR)........................ 67 PUMP PRESSURE SENSOR.................................. 67 GROUP 2 - Swing device.................................... 54 OUTLINE............................................... 69 SWING MOTOR........................................... 70 BRAKE VALVE........................................... 72 SWING PARKING BRAKE................................... 74 SWING REDUCTION GEAR.................................. 75 GROUP 3 - Control valve................................... 54 OUTLINE............................................... 77 HYDRAULIC CIRCUIT..................................... 82 FLOW COMBINER VALVE................................... 84 PUMP CONTROL VALVE.................................... 86 MAIN RELIEF VALVE..................................... 88 OVERLOAD RELIEF VALVE................................. 89 ARM REGENERATIVE VALVE................................ 90 BOOM ANTI-DRIFT VALVE, ARM ANTIDRIFT.................. 92 BUCKET FLOW CONTROL VALVE............................. 92 TRAVEL FLOW CONTROL VALVE............................. 94 TRAVEL/BOOM LOWER SELECTOR VALVE...................... 94 BOOM REGENERATIVE VALVE............................... 96 GROUP 4 - Pilot valve..................................... 54 OUTLINE............................................... 97 OPERATION............................................. 99 GROUP 5 - Travel device................................... 54 OUTLINE...............................................107 TRAVEL REDUCTION GEAR.................................108 TRAVEL MOTOR..........................................109 TRAVEL BRAKE VALVE....................................113 PARKING BRAKE.........................................115 GROUP 6 - Other components (Upperstructure)............... 54 PILOT SHUT-OFF VALVE..................................117 SHOCKLESS VALVE.......................................118 SOLENOID VALVE UNIT...................................120 PILOT RELIEF VALVE....................................122 EC MOTOR..............................................122 GROUP 7 - Other components (Undercarriage)................ 54 SWING BEARING.........................................123 CENTER JOINT..........................................124 TRACK ADJUSTER........................................125
Customer Support: [email protected]
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]
S.M
