Technical Manual Hitachi ZX27-3 Excavator | T1YC-E-00

Technical Manual Hitachi ZX27-3 Excavator T1YC-E-00 (Preview)

T1YC-E-00
INTRODUCTION
SAFETY
SECTION AND GROUP CONTENTS
SECTION 1 GENERAL
Group 1 Specifications
Specifications
Working Ranges
Group 2 Component Layout
Main Component
Electrical System (Overview)
Electrical System (Relays and Fuses)
Electrical System (Monitor, Switches)
Engine
Swing Device
Control Valve
2-Spool Solenoid Valve Unit
Travel Device
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 Electrical System
Outline
Main Circuit
Electric Power Circuit (key Switch: OFF)
Electric Power Circuit (key Switch: ON)
Preheating Circuit (Key Switch: ON)
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
SECTION 3 COMPONENT OPERATION
Group 1 Pump Device
Outline
Main Pumps 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 Flow Combining Circuit
Boom Ant-Drift 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
Travel Reduction Gear
Travel Brake Valve
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
Main Pump P-Q Diagram
Group 3 Engine Test
Engine Speed
Engine Compression Pressure
Valve Clearance
Injector Test
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
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
All Actuator System Troubleshooting
Front Attachment System Troubleshooting
Swing System Troubleshooting
Travel System Troubleshooting
Boom Swing System Troubleshooting
Blade System Troubleshooting
Heater Troubleshooting
How to Lower Boom in Case of Emergency and When Engine Stops
Group 3 Troubleshooting C
Troubleshooting C Procedure
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 Buzzer
Malfunction of Hour Meter
Group 4 Electrical System Inspection
Precautions for Inspection and Maintenance
Fuse Inspection
Battery Voltage Check
Voltage Check
Continuity Check
SERVICE MANUAL REVISION REQUEST FORM
THE ATTACHED DIAGRAM LIST