Hitachi ZX670LC-5A, ZX690LCH-5A Hydraulic Excavator WJBG-EN-00 (Preview)
WJBG-EN-00
INTRODUCTION
To The Reader
Additional References
Manual Composition
Page Number
Safety Alert Symbol and Headline Notations
Units Used
SYMBOL AND ABBREVIATION
SAFETY
Recognize Safety Information
Understand Signal Words
Follow Safety Instructions
Prepare for Emergencies
Wear Protective Clothing
Protect Against Noise
Inspect Machine
General Precautions for Cab
Use Handholds and Steps
Adjust the Operator’s Seat
Ensure Safety Before Rising from or Leaving Operator’s Seat
Fasten Your Seat Belt
Move and Operate Machine Safely
Operate Only from Operator’s Seat
Jump Starting
Keep Riders off Machine
Precautions for Operations
Investigate Job Site Beforehand
Install OPG Guard
Restriction of Attachment Installation
Provide Signals for Jobs Involving Multiple Machines
Confirm Direction of Machine to Be Driven
Drive Machine Safely
Avoid Injury from Rollaway Accidents
Avoid Injury from Back-Over and Swing Accidents
Keep Person Clear from Working Area
Never Position Bucket Over Anyone
Avoid Undercutting
Avoid Tipping
Never Undercut a High Bank
Dig with Caution
Operate with Caution
Avoid Power Lines
Precautions for Lightning
Object Handling
Protect Against Flying Debris
Park Machine Safely
Handle Fluids Safely−Avoid Fires
Transport Safely
Practice Safe Maintenance
Warn Others of Service Work
Support Machine Properly
Stay Clear of Moving Parts
Prevent Parts from Flying
Avoid Injury from Attachment Falling Accident
Prevent Burns
Replace Rubber Hoses Periodically
Avoid High-Pressure Fluids
Prevent Fires
Evacuating in Case of Fire
Beware of Exhaust Fumes
Precautions for Welding and Grinding
Avoid Heating Near Pressurized Fluid Lines
Avoid Applying Heat to Lines Containing Flammable Fluids
Precautions for Handling Accumulator and Gas Damper
Remove Paint Before Welding or Heating
Beware of Asbestos and Silicon Dust and Other Contamination
Prevent Battery Explosions
Service Air Conditioning System Safely
Handle Chemical Products Safely
Dispose of Waste Properly
Never Ride Attachment
Precautions for Communication Terminal
Precautions for Communication Terminal Equipment
Before Returning the Machine to the Customer
SECTION AND GROUP CONTENTS
SECTION 1 GENERAL
Group 1 Precautions for Disassembling and Assembling
Precautions for Disassembling and Assembling
Group 2 Tightening
Tightening Bolts and Nuts
Piping Joint
Group 3 Painting
Painting specification
Final painted color
Group 4 Bleeding Air
Bleeding Air from Hydraulic Oil Tank (Pressure Release)
Bleeding Air from Hydraulic System
Bleeding Air from Fuel System
Bleeding Air from Expansion Tank (Radiator) (Pressure Release)
Group 5 Pressure Release Procedure
Hydraulic Circuit Pressure Release Procedure
Group 6 Preparation
Preparation before Inspection and Maintenance
SECTION 2 MAINTENANCE STANDARD
Group 1 Upperstructure
Main Pump
Fan Pump
Swing Motor
Group 2 Undercarriage
Travel Device
Sprocket
Center Joint
Front Idler
Upper Roller
Lower Roller
Track
Group 3 Front Attachment
Pin and Bushing
Side Cutter
Point
Standard Dimensions for Arm and Bucket Connection
Standard Dimensions for Arm and Boom Connection
Cylinder
SECTION 3 UPPERSTRUCTURE
Group 1 Cab
Removal and Installation of Cab
Dimensions of Cab Glass (Standard Cab)
Dimensions of Cab Glass (H Cab)
Group 2 Counterweight
Removal and Installation of Counterweight
Group 3 Main Frame
Removal and Installation of Main Frame
Group 4 Engine
Removal and Installation of Engine
Group 8 Pump Device
Removal and Installation of Pump Device
Disassembly of Pump Transmission
Assembly of Pump Transmission
Disassembly of Main Pump
Assembly of Main Pump
Disassembly of Regulator for Main Pump
Assembly of Regulator for Main Pump
Disassembly of Fan Pump
Assembly of Fan Pump
Assembly of Regulator for Fan Pump
Structure of Pilot Pump
Group 9 Control Valve
Removal and Installation of Control Valve
Disassembly and Assembly of Valve Unit
Disassembly of Control Valve (4-Spool Side)
Assembly of Control Valve (4-Spool Side)
Disassembly of Control Valve (5-Spool Side)
Assembly of Control Valve (5-Spool Side)
Group 10 Swing Device
Removal and Installation of Swing Device
Disassembly of Swing Device
Assembly of Swing Device
Disassembly of Swing Motor
Assembly of Swing Motor
Group 11 Pilot Valve
Removal and Installation of Pilot Valve (Left)
Removal and Installation of Pilot Valve (Right)
Removal and Installation of Travel Pilot Valve
Disassembly of Pilot Valves (Right and Left)
Assembly of Pilot Valves (Right and Left)
Disassembly of Travel Pilot Valve
Assembly of Travel Pilot Valve
Group 12 Solenoid Valve
Removal and Installation of Pilot Shut-Off Solenoid Valve
Removal and Installation of 4-Spool Solenoid Valve Unit
Removal and Installation of 2-Spool Solenoid Valve Unit
Disassembly of Pilot Shut-Off Solenoid Valve
Assembly of Pilot Shut-Off Solenoid Valve
Structure of 4-Spool Solenoid Valve Unit
Structure of 2-Spool Solenoid Valve Unit
Group 13 Signal Control Valve
Removal and Installation of Signal Control Valve
Structure of Signal Control Valve
Group 14 Shockless Valve
Removal and Installation of Shockless Valve
Structure of Shockless Valve
Group 15 Fan Valve
Removal and Installation of Fan Valve
Structure of Fan Valve
Group 16 Fan Motor
Removal and Installation of Fan Motor
Structure of Fan Motor
SECTION 4 UNDERCARRIAGE
Group 1 Swing Bearing
Removal and Installation of Swing Bearing
Disassembly of Swing Bearing
Assembly of Swing Bearing
Group 2 Travel Device
Removal and Installation of Travel Device
Disassembly of Travel Device
Assembly of Travel Device
Disassembly of Travel Motor
Assembly of Travel Motor
Disassembly of Brake Valve
Assembly of Brake Valve
Precautions for Using Floating Seal
Group 3 Center Joint
Removal and Installation of Center Joint
Disassembly of Center Joint
Assembly of Center Joint
Replacement of Body and Spindle
Group 4 Track Adjuster
Removal and Installation of Track Adjuster
Disassembly of Track Adjuster
Assembly of Track Adjuster
Group 5 Front Idler
Removal and Installation of Front Idler
Disassembly of Front Idler
Assembly of Front Idler
Precautions for Using Floating Seal
Group 6 Upper and Lower Rollers
Removal and Installation of Upper Roller
Removal and Installation of Lower Roller
Disassembly of Upper Roller
Assembly of Upper Roller
Disassembly of Lower Roller
Assembly of Lower Roller
Precautions for Using Floating Seal
Group 7 Track
Removal and Installation of Track
SECTION 5 FRONT ATTACHMENT
Group 1 Front Attachment
Removal and Installation of Bucket
Removal and Installation of Arm
Removal and Installation of Boom
Remove and Install Bushing
Group 2 Cylinder
Removal and Installation of Boom Cylinder
Removal and Installation of Arm Cylinder
Removal and Installation of Bucket Cylinder
Disassembly of Boom Cylinder
Assembly of Boom Cylinder
Disassembly of Arm Cylinder
Assembly of Arm Cylinder
Disassembly of Bucket Cylinder
Assembly of Bucket Cylinder
SERVICE MANUAL REVISION REQUEST FORM
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