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Fiat Hitachi Excavator EX355 Operational Principle Technical Manual – PDF DOWNLOAD
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Description
Fiat Hitachi Excavator EX355 Operational Principle Technical Manual – PDF DOWNLOAD
FILE DETAILS:
Fiat Hitachi Excavator EX355 Operational Principle Technical Manual – PDF DOWNLOAD
Language : English
Pages : 142
Downloadable : Yes
File Type : PDF
DESCRIPTION:
Fiat Hitachi Excavator EX355 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 EX355 Operational Principle Technical Manual – PDF DOWNLOAD
TECHNICAL MANUAL OPERATIONAL PRINCIPLE................................ 1 OPERATIONAL PRINCIPLE.................................................. 2 GENERAL................................................................ 5 Group 1 - Specifications........................................... 6 EXCAVATOR DIMENSIONS........................................... 6 EXCAVATOR DIMENSIONS........................................... 7 EXCAVATOR PERFORMANCE.......................................... 8 ENGINE......................................................... 8 ENGINE ACCESSORY............................................... 9 HYDRAULIC DEVICES.............................................. 9 ELECTRICAL EQUIPMENT........................................... 10 Group 2 - Component layout......................................... 12 MAIN COMPONENTS................................................ 12 ELECTRICAL SYSTEM.............................................. 13 ELECTRICAL SYSTEM.............................................. 14 ELECTRICAL SYSTEM.............................................. 15 ELECTRICAL SYSTEM.............................................. 16 OTHER COMPONENTS............................................... 17 SYSTEM................................................................. 20 Group 1 - Control system........................................... 21 OUTLINE........................................................ 21 ENGINE CONTROL................................................. 22 PUMP CONTROL................................................... 28 VALVE CONTROL.................................................. 29 OTHER CONTROL FUNCTIONS........................................ 33 Group 2 - Hydraulic system......................................... 35 MAIN CIRCUIT................................................... 35 PILOT CIRCUIT.................................................. 36 NEUTRAL CIRCUIT................................................ 38 SINGLE ACTUATOR OPERATION...................................... 38 COMBINED OPERATION............................................. 40 Group 3 - Electrical system........................................ 45 OUTLINE........................................................ 45 ELECTRIC POWER CIRCUIT......................................... 46 BULB CHECK CIRCUIT............................................. 47 ACCESSORY CIRCUIT.............................................. 48 PREHEAT CIRCUIT................................................ 50 STARTING CIRCUIT............................................... 52 CHARGING CIRCUIT............................................... 54 SURGE VOLTAGE PREVENTION CIRCUIT............................... 57 ENGINE STOP CIRCUIT............................................ 58 COMPONENT OPERATION.................................................... 60 Group 1 - Pump device.............................................. 61 OUTLINE........................................................ 61 MAIN PUMP...................................................... 62 REGULATOR...................................................... 64 PILOT PUMP..................................................... 71 N SENSOR....................................................... 71 PUMP DELIVERY PRESSURE SENSOR.................................. 71 Group 2 - Swing device............................................. 73 OUTLINE........................................................ 73 SWING MOTOR.................................................... 74 SWING PARKING BRAKE............................................ 76 VALVE UNIT..................................................... 77 SWING REDUCTION GEAR........................................... 79 Group 3 - Control valve............................................ 81 OUTLINE........................................................ 81 HYDRAULIC CIRCUIT.............................................. 86 FLOW COMBINER VALVE............................................ 90 PUMP CONTROL VALVE............................................. 92 MAIN RELIEF VALVE.............................................. 94 OVERLOAD RELIEF VALVE.......................................... 95 ARM REGENERATIVE VALVE......................................... 96 BOOM REGENERATIVE VALVE........................................ 98 ARM ANTI-DRIFT VALVE...........................................100 ARM ANTI-DRIFT VALVE (On Rod Side) / BOOM ANTI-DRIFT VALVE....103 BUCKET FLOW RATE CONTROL VALVE.................................104 TRAVEL FLOW RATE CONTROL VALVE.................................106 BYPASS SHUT-OUT VALVE..........................................108 NEEDLE VALVE...................................................110 Group 4 - Pilot valve..............................................111 OUTLINE........................................................111 OPERATION......................................................113 Group 5 - Travel device............................................121 OUTLINE........................................................121 TRAVEL MOTOR...................................................122 PARKING BRAKE..................................................124 TRAVEL SPEED CONTROL...........................................126 TRAVEL BRAKE VALVE.............................................128 TRAVEL REDUCTION GEAR..........................................130 Group 6 - Other components (Upperstructure)........................133 PILOT SHUT-OFF VALVE...........................................133 SHOCKLESS VALVE................................................134 SOLENOID VALVE UNIT............................................136 PILOT RELIEF VALVE.............................................138 EC MOTOR.......................................................138 Group 7 - Other components (Undercarriage).........................139 SWING BEARING..................................................139 CENTER JOINT...................................................140 TRACK ADJUSTER.................................................141
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