Factory Technical Manual and Workshop Manual For Hitachi EX50U North America Excavators. Tons of illustrations, instructions, diagrams for step by step remove and install, assembly and disassembly, service, inspection, repair, troubleshooting, tune-ups.
Format: PDF
Language: English
Pages: 470
Bookmarks: Yes
Searchable: Yes
Number:
Wiring Diagrams: Yes
Hydraulic Diagrams: Yes
Model
Hitachi EX50U North America
Contents
1.Technical Manual
-GENERAL
–SPECIFICATION
Specifications
Working Ranges and Machine
Dimensions for Transportation
Engine Specification
–COMPONENT LAYOUT
Main Component
Electrical System
Relays
Monitor and Switches
-SYSTEM
-HYDRAULIC SYSTEM
Outline
Main Circuit
Pilot Circuit
-COMPONENT OPERATION
–PUMP DEVICE
Outline
Main Pump
Pilot Pump
–SWING DEVICE
Outline
Swing Motor
Parking Brake Changeover Valve
Valve Unit
Swing Reduction Gear
–CONTROL VALVE
Outline
Hydraulic Circuit
Boom Anti-Drift Valve
Flow Combiner Valve
Main Relief Valve
Overload Relief Valve
Make-up Valve
–PILOT VALVE
Outline
Operation
–TRAVEL DEVICE
Outline
Travel Motor
Travel Brake Valve
Travel Reduction Gear
–OTHERS (UPPERSTRUCTURE)
Solenoid Valve
–OTHERS (UNDERCARRIAGE)
Swing Bearing
Center Joint
Track Adjuster
-OPERATIONAL PERFORMANCE TEST
–INTRODUCTION
Operational Performance Test
Preparation for Performance Tests
–ENGINE TEST
Engine Speed
Engine Compression Pressure
Valve Clearance
Nozzle Check
Injection Timing
–EXCAVATOR TEST
Travel Speed
Track Revolution Speed
Mistrack Check
Travel Motor Leakage
Swing Speed
Swing Function Drift Check
Swing Motor Leakage
Maximum Swingable Slant Angle
Swing Bearing Play
Hydraulic Cylinder Cycle Time
Dig Function Drift
Control Lever Operating Force
Control Lever Stroke
–COMPONENT TEST
Primary Pilot Pressure
Secondary Pilot Pressure
Main Relief Valve Set Pressure
Overload Relief Valve Set Pressure
Pump Driving Torque
Swing Motor Drainage
Travel Motor Drainage
–STANDARD
Operational Performance Standard
-TROUBLESHOOTING
–DIAGNOSING PROCEDURE
Introduction
Diagnosing Procedure
–TROUBLESHOOTING A
Troubleshooting A Procedure
Engine system Troubleshooting
Actuator Operating System Troubleshooting
Front Attachment System Troubleshooting
Swing System Troubleshooting
Travel System Troubleshooting
Blade System Troubleshooting
How to Lower Boom When Engine Stops
–TROUBLESHOOTING B
Troubleshooting B Procedure
Malfunction of Coolant Temperature Gauge
Malfunction of Fuel Gauge
Malfunction of Alternator Indicator
Malfunction of Engine Oil Pressure Indicator
Malfunction of Overheat Indicator
Malfunction of Fuel Level Indicator
Malfunction of Air Filter Restriction Indicator
Malfunction of Buzzer
Malfunction of Hour Meter
–ELECTRICAL SYSTEM INSPECTION
Precautions for Inspection and Maintenance
Fuse Continuity Test
Battery Voltage Check
Voltage Check
Continuity Check
-ALL DIAGRAMS
2.Workshop Manual
-GENERAL INFORMATION
–PRECAUTIONS FOR DISASSEMBLING AND ASSEMBLING
Precautions for Disassembling and Assembling
–TIGHTENING
Tightening Torque Specification
Torque Chart
Piping Joint
-UPPERSTRUCTURE
–CANOPY
Remove and Install Canopy
–COUNTERWEIGHT
Remove and Install Counterweight
–PUMP DEVICE
Remove and Install Pump Device
Disassemble Pump Device
Assemble Pump Device
Maintenance Standard
–CONTROL VALVE
Remove and Install Control Valve
Disassemble And Assemble Control Valve
–SWING DEVICE
Remove and Install Swing Device
Disassemble Swing Reduction Gear
Assemble Swing Reduction Gear
Disassemble Swing Motor
Assemble Swing Motor
Disassemble And Assemble Parking Brake Switch Valve
Maintenance Standards
–PILOT VALVE
Remove and Install Front Pilot Valve
Disassemble Front Pilot Valve
Assemble Front Pilot Valve
Remove and Install Travel Pilot Valve
Disassemble Travel Pilot Valve
Assemble Travel Pilot Valve
–SOLENOID VALVE
Disassemble and Assemble Solenoid Valve
–ROTARY VALVE
Remove and Install Rotary Valve
Disassemble Rotary Valve
Assemble Rotary Valve
-UNDERCARRIAGE
–SWING BEARING
Remove and Install Swing Bearing
–TRAVEL DEVICE
Remove and Install Travel Device
Disassemble Travel Device
Assemble Travel Device
Maintenance Standards
–CENTER JOINT
Remove and Install Center Joint
Disassemble Center Joint
Assemble Center Joint
–TRACK ADJUSTER
Remove and Install Track Adjuster
–FRONT IDLER
Remove and Install Front Idler
Maintenance Standards
–UPPER AND LOWER ROLLER
Remove and Install Upper Roller
Remove and Install Lower Roller
Maintenance Standards
–TRACK
Remove and Install Rubber Crawler
Maintenance Standards
-FRONT ATTACHMENT
–FRONT ATTACHMENT
Remove and Install Front Attachment
Maintenance Standards
–CYLINDER
Remove and Install Cylinders
Disassemble Boom And Arm Cylinders
Assemble Boom And Arm Cylinders
Disassemble Bucket, Swing And Blade Cylinders
Assemble Bucket, Swing And Blade Cylinders
Maintenance Standards
-ENGINE
–GENERAL INFORMATION
General Repair Instruction
Notes On The Format Of This Manual
Appearance
Main Data And Specifications
Tightening Torque Specifications Angular Nut And Bolt Tightening Method
Tightening Torque On Major Components
Gasket Location
Maintenance
Recomended Lubrication Oil
–ENGINE
Disassembly
Inspection And Repair
Reassembly
–LUBRICATION SYSTEM
Lubrication Oil Circulation
System Diagram
Oil Pump
–COOLING SYSTEM
Cooling Water Circulation
System Diagram
Water Pump
Thermostat
–FUEL SYSTEM
Fuel Circulation System Diagram
Governor
Nozzle Holder Assembly
–TROUBLESHOOTING
–SPECIAL TOOL
–CONVERSION TABLE
Length
Area
Volume
Mass
Pressure
Torque
Temperature
What you get
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