Technical Manual Hitachi ZX19-5A Excavator | TABG50-EN-00

Technical Manual Hitachi ZX19-5A Excavator TABG50-EN-00 (Preview)

TABG50-EN-00
INTRODUCTION
SYMBOL AND ABBREVIATION
SAFETY
CONTENTS
SECTION 1 GENERAL
Group 1 Specifications
Specifications
Working Range
Group 2 Component Layout
Main Component
Electrical System (Overview)
Electrical System (Components Related with Relays)
Electrical System (Components Related with Monitor and Switches)
Components Related with Engine
Swing Device
Components Related with Control Valve
Travel Device
2-Spool Solenoid Valve Unit
AUX Function Solenoid Valve
Group 3 Component Specifications
Engine
Engine Accessories
Hydraulic Component
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: HEAT)
Starting Circuit (Key Switch: START)
Charging Circuit (Key Switch: ON)
Pilot Shut-Off Circuit (Key Switch: ON)
Engine Stop Circuit (Key Switch: OFF)
Travel Mode Selector Circuit
Monitor Circuit
Indicator Circuit
Work Light/Monitor Internal Light Circuit
Gauge Circuit
SECTION 3 COMPONENT OPERATION
Group 1 Pump Device
Outline
Main Pump P1, Main Pump P2
Main Pump P3, Pilot Pump P4
Output Power Control Operation
Group 2 Swing Device
Outline
Swing Motor
Parking Brake
Valve Unit
Group 3 Control Valve
Outline
Hydraulic Circuit
Unload Valve
Flow Combiner Valve
Main Relief Valve
Overload Relief Valve
Make-Up Valve
Group 4 Pilot Valve
Outline
Operation
Group 5 Travel Device
Outline
Travel Reduction Gear
Travel Motor
Parking Brake
Travel Brake Valve
Group 6 Others (Upperstructure)
2-Spool Solenoid Valve
AUX Function Solenoid Valve
Group 7 Others (Undercarriage)
Swing Bearing
Center Joint
Track Adjuster
SECTION 4 OPERATIONAL PERFORMANCE TEST
Group 1 Introduction
Operational Performance Tests
Preparation for Performance Tests
Group 2 Standard
Operational Performance Standard Table
Main Pump P1, Main Pump P2 P-Q Diagram
Group 3 Engine Test
Engine Speed
Group 4 Machine Performance Test
Travel Speed
Track Revolution Speed
Mistrack Check
Travel Parking 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 andSwing Function Check
Clearance of Front Attachment ConnectingPart
Group 5 Component Test
Primary Pilot Pressure
Secondary Pilot Pressure
Main Relief Set Pressure
Relief Pressure (when relieving swing)
Overload Relief Valve Set Pressure
Pump Driving Torque
Swing Motor Drainage
Travel Motor Drainage
Group 6 Adjustment
Engine Control Lever Adjustment
SECTION 5 TROUBLESHOOTING
Group 1 Diagnosing Procedure
Introduction
Diagnosis Procedure
Electric System Inspection
Precautions for Inspection and Maintenance
Instructions for Disconnecting Connectors
Fuse Inspection
Slow Blow Fuse Inspection
Battery Voltage Check
Alternator Check
Continuity Check
Voltage Inspection Method
Group 2 Troubleshooting B
Troubleshooting B (Machine Diagnosis by UsingTroubleshooting Symptom) Procedure
List of Trouble Symptom
Engine System Troubleshooting
All Actuator System Troubleshooting
Front Attachment System Troubleshooting
Swing System Troubleshooting
Travel System Troubleshooting
Relationship between Faulty Seal Location and Mistrack Direction
Other System Troubleshootin
How to Lowering Boom When Emergency and When Engine Stops
Group 3 Troubleshooting C
Troubleshooting C (Monitor Diagnosis)Procedure
List of Trouble Symptom
Malfunction of Monitor Buzzer
Malfunction of Coolant Temperature Indicator
Coolant Temperature Gauge
Malfunction of Fuel Gauge
Malfunction of Hour Meter
Indicator Operation Check
Malfunction of Fuel Level Indicator
Malfunction of Overheat Indicator
Malfunction of Engine Oil Pressure Indicato
Malfunction of Alternator Indicator
Malfunction of Preheat Indicator
Malfunction of Fast Speed Indicator
SERVICE MANUAL REVISION REQUEST FORM
The Attached Diagram List