Technical Manual Hitachi ZX22U-2 Excavator | T1MW-E-00 (2008.06.24)

Technical Manual Hitachi ZX22U-2 Excavator T1MW-E-00 (2008.06.24) (Preview)

ZX22U-2_T1MW-E-00
INTRODUCTION
SAFETY
SECTION AND GROUP CONTENTS
SECTION 1 GENERAL
Group 1 Specifications
Standard Specification
Working Ranges / Transportation Dimensions
Group 2 Component Layout
Main Component Layout
Electrical System (Overview)
Electrical System (Relays)
Electrical System (Monitor and Switches)
Engine
Swing Device
Control Valve
Travel Device
2-Spool Solenoid Valve
Group 3 Component Specifications
Engine
Engine Accessories
Hydraulic Component
Filter
Electrical Component
SECTION 2 SYSTEM
Group 1 Hydraulic System
Outline
Pilot Circuit
Main Circuit
Group 2 Electric System
Outline
Main Circuit
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)
Monitor Circuit
Indicator Circuit
Work Light / Internal Illumination Circuit
Gauge Circuit
Travel Alarm Circuit (Option)
SECTION 3 COMPONENT OPERATION
Group 1 Pump Device
Outline
Main Pump P1, P2
Main Pump P3, Pilot Pump P4
Horse Power Control Operation
Group 2 Swing Device
Outline
Swing Motor
Parking Brake
Valve Unit
Swing Reduction Gear
Group 3 Control Valve
Outline
Hydraulic Circuit
Arm Regenerative Valve
Flow Combiner Valve
Main Relief Valve
Overload Relief Valve
Make-Up Valve
Group 4 Pilot Valve
Outline
Operation
Shockless Function (Only for Travel Pilot Valve)
Group 5 Travel Device
Outline
Travel Motor
Parking Brake
Travel Brake Valve
Travel Reduction Gear
Group 6 Others (Upperstructure)
2-Spool Solenoid Valve
Pilot Relief Valve
Group 7 Others (Undercarriage)
Swing Bearing
Center Joint
Track Adjuster
SECTION 4 OPERATIONAL PERFORMANCE TEST
Group 1 Introduction
Operational Performance Test
Preparation for Performance Tests
Group 2 Standard
Operational Performance Standard Table
Main Pump P-Q Diagram
Group 3 Engine Test
Engine Speed
Engine Compression Pressure
Valve Clearance
Nozzle Check
Injection Timing
Group 4 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 Check
Control Lever Operating Force
Control Lever Stroke
Combined Operation of Boom Raise/Swing Function Check
Group 5 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
Group 6 Adjustment
Fuel Lever Adjustment
SECTION 5 TROUBLESHOOTING
Group 1 Diagnosing Procedure
Introduction
Diagnosing Procedure
Group 2 Troubleshooting B
Troubleshooting B Procedure
Engine System Troubleshooting
Actuator System Troubleshooting
Front Attachment System Troubleshooting
Swing System Troubleshooting
Travel System Troubleshooting
Boom Swing System Troubleshooting
Blade System Troubleshooting
How to Lower Boom when Engine Stops
How to Prevent Horn Blowing With Key Switch at off Position
Group 3 Troubleshooting C
Troubleshooting C Procedure
Malfunction of Coolant Temperature Gauge
Malfunction of Fuel Gauge
Malfunction of Preheat Indicator
Malfunction of Charge Lamp
Malfunction of Engine Oil Pressure Indicator
Malfunction of Overheat Indicator
Malfunction of Fuel Level Indicator
Malfunction of Hour Meter
Faulty Buzzer
Group 4 Electrical System Inspection
Precautions for Inspection and Maintenance
Fuse Continuity Test
Battery Voltage Check
Voltage Check
Continuity Check
SERVICE MANUAL REVISION REQUEST FORM
THE ATTACHED DIAGRAM LIST