Hitachi 40U-3 40U-3F 50U-3 50U-3F Technical Manual

Factory Technical Manual For Hitachi 40U-3, 40U-3F, 50U-3, 50U-3F Excavators. Technical information needed to maintain and repair this machine.

Format: PDF
Language: English
Pages: 375 + 19
Bookmarks: Yes
Searchable: Yes
Number: T1NG-E-00
Wiring Diagrams: Yes
Hydraulic Diagrams: Yes

Model

Hitachi 40U-3, 40U-3F, 50U-3, 50U-3F

Contents

1.Circuits Hydraulic / Electrical
2.Technical Manual
INTRODUCTION
SAFETY
-GENERAL
–SPECIFICATIONS
Specifications
Working Ranges
–COMPONENT LAYOUT
Main Components
Electrical Component Layout (Overview)
Electrical System (Controllers and Relays)
Electrical System (Monitor and Switches)
Engine
Swing Device
Travel Device
Revolution Sensing Valve / Pilot Filter
Auxiliary Flow Selector Valve (Optional)
Control Valve
2-Spool Solenoid Valve
–COMPONENT SPECIFICATIONS
Engine
Engine Accessories
Hydraulic Component
Filter
-SYSTEM
–CONTROL SYSTEM
Outline
Engine Control
Pump Control
Front Attachment Control
Other Control
–HYDRAULIC SYSTEM
Outline
Pilot Circuit
Main Circuit
–ELECTRICAL SYSTEM
Outline
Electric Power Circuit
(Key Switch: OFF)
Electric Power Circuit (Key Switch: ON)
Preheating Circuit (Key Switch: HEAT)
Starting Circuit (Key Switch: START)
Charging Circuit (Key Switch: ON)
Engine Stop Circuit (Key Switch: OFF)
-COMPONENT OPERATION
–PUMP DEVICE
Outline
Main Pump
Power Control
Flow Rate Control
PS Valve
–REVOLUTION SENSING VALVE
Outline
Operation
–SWING DEVICE
Outline
Swing Motor
Parking Brake
Valve Unit
Swing Reduction Gear
–CONTROL VALVE
Outline
Hydraulic Circuit
Main Relief Valve
Overload Relief Valve
Make-Up Valve
Boom Anti-Drift Valve
Unload Valve
Differential Reducing Valve
Pressure Compensator
–PILOT VALVE
Outline
Operation
Shockless Function (Only for Travel Pilot Valve)
–TRAVEL DEVICE
Outline
Travel Reduction Gear
Travel Motor
Travel Brake Valve
Parking Brake
–OTHERS (UPPERSTRUCTURE)
Solenoid Valve
Pilot Relief Valve
Back Pressure Valve
Multifunction Solenoid Valve (Optional)
Auxiliary Flow Selector Valve (Optional)
–OTHERS (UNDERCARRIAGE)
Swing Bearing
Center Joint
Track Adjuster
-OPERATIONAL PERFORMANCE TEST
–INTRODUCTION
Operational Performance Test
Preparation for Performance Tests
–STANDARD
Operational Performance Standard
Main Pump P-Q Diagram
–ENGINE TEST
Engine Speed
Engine Compression Pressure
Valve Clearance
Nozzle Check
–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
Combined Boom Raise/Swing Function Check
–COMPONENT TEST
Primary Pilot Pressure
Secondary Pilot Pressure
Main Relief Valve Set Pressure
Overload Relief Valve Set Pressure
Swing Motor Drainage
Travel Motor Drainage
Revolution Sensing Valve Output Pressure (Pressure PGR)
Pump Delivery Pressure
Pump Driving Torque
Auxiliary Flow Selector Valve (Optional)
–ADJUSTMENT
Governor Adjustment
-TROUBLESHOOTING
–DIAGNOSING PROCEDURE
Introduction
Diagnosing Procedure
–TROUBLESHOOTING A
Troubleshooting A Procedure
Error Indication List
Wire Breakage and Short Circuit of Engine Control Dial (System Failure Indicator Flickering Every 1 Sec)
Motor Sensor Breakage and Short Circuit (System Failure Indicator: Flickering Every 05 Sec)
Abnormal Motor(System Failure Indicator: Lit)
–TROUBLESHOOTING B
Troubleshooting B Procedure (Diagnosis of Machine by Symptom)
Engine System Troubleshooting
All Actuator System Troubleshooting
Front Attachment System Troubleshooting
Swing System Troubleshooting
Travel System Troubleshooting
Blade System Troubleshooting
Boom Swing System Troubleshooting
Air Conditioner System Troubleshooting (Only Cab Spec)
Work After Replacing Components
Charge Air Conditioner with Refrigerant
Purging Procedure
Warm-up Operation
Inspection
How to Lower Boom when Engine Stops
–TROUBLESHOOTING C
Troubleshooting C Procedure (Diagnosis of Monitor)
Malfunction of Coolant Temperature Gauge
Malfunction of Fuel Gauge
Malfunction of Preheat Indicator
Malfunction of Alternator Indicator
Malfunction of Engine Oil Pressure Indicator
Malfunction of Overheat Indicator
Malfunction of Fuel Level Indicator
Malfunction of Monitor Buzzer
Malfunction of Liquid Crystal Display (LCD)
Malfunction of Hour Meter
Malfunction of Auto-Idle Indicator
–ELECTRICAL SYSTEM INSPECTION
Precautions for Inspection and Maintenance
Fuse Continuity Test
Battery Voltage Check
Voltage Check
Continuity Check

Electrical Component

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