Hitachi ZX38U-6 Excavator WADS50-EN-01 (Preview)
WADS50-EN-01
INTRODUCTION
To The Reader
Additional References
Manual Composition
Page Number
Safety Alert Symbol and Headline Notations
Units Used
SYMBOL AND ABBREVIATION
Symbols and abbreviations
CONTRASTING LIST OF PART NAME
Contrasting List of Part Name between Technical Manual and Parts Catalog
SAFETY
Recognize Safety Information
Understand Signal Words
Follow Safety Instructions
Prepare for Emergencies
Wear Appropriate Clothing
Protect Against Noise
Inspect Machine
General Precautions for the Cab
Use Handholds and Steps
Adjust the Operator’s Seat
Ensure Safety Before Leaving or Standing up from 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
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 People Clear from Working Area
Never Position the Bucket Over Anyone
Avoid Undercutting
Avoid Tipping
Never Undercut a High Bank
Dig with Caution
Operate with Caution
Avoid Power Lines
Precautions for Lightning
Lifting Application
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
Compliance with CE Rules and Regulations (EU)
Precautions about Operator’s Seat Protections when Overturned (4-pillar Canopy or Cab Models)
Before Returning the Machine to the Customer
SECTION AND GROUP CONTENTS
CONTENTS
GENERAL
Precautions for Disassembling and Assembling
Precautions for Disassembling and Assembling
Precautions for Using Floating Seal
Precautions for Using Nylon Sling
Maintenance Standard Terminology
Tightening
Tightening Bolts and Nuts
Bolt Types
Specified Tightening Torque Chart
Tightening Order
Precautions for Spilt Flange
Nut and Bolt Locking
Tightening Piping Joint
Union Joint
Pipe Joint
O-Ring Face Seal Joint
Quick Coupling
Screw-In Connection
Seal Tape Application
Low Pressure Hose Clamp Tightening
Connecting Hose
Painting
Painting
Bleeding Air
Bleeding Air from Hydraulic System
Bleeding Air from Pump
Bleeding Air from Travel Motor, Swing Motor
Bleeding Air from Hydraulic Circuit
Bleeding Air from Fuel System
Bleeding Air from Radiator
Preparation
Preparation before Inspection and Maintenance
Hydraulic Circuit Pressure Release Procedure
Pressure Release from Hydraulic Oil Tank
MAINTENANCE STANDARD
Upperstructure
Maintenance Standard for Pump Device
Maintenance Standard for Swing Motor
Undercarriage
Maintenance Standard for Travel Motor
Maintenance Standard for Sprocket
Maintenance Standard for Front Idler
Maintenance Standard for Upper Roller
Maintenance Standard for Lower Roller
Maintenance Standard for Track (Rubber Crawler)
Maintenance Standard for Track (Steel Crawler)
Front Attachment
Maintenance Standard for Pin and Bushing (Front Parts)
Maintenance Standard for Pin and Bushing (Boom Swing Parts)
Maintenance Standard for Pin and Bushing (Blade Parts)
Maintenance Standard for Side Cutter (4626441, 4626442)
Maintenance Standard for Point (4080730)
Standard Dimensions for Arm and Bucket Connection
UPPERSTRUCTURE
Canopy/Cab
Removal of 4-Pillars Canopy
Installation of 4-Pillars Canopy
Removal of Cab
Installation of Cab
Dimensions of Cab Glass
Procedure to Remove Cab Glass and Overhead Window
Procedure to Install Cab Glass
Procedure to Install Overhead Window
Procedure to Install Front Window Glass
Counterweight
Removal of Counterweight
Installation of Counterweight
Pump Device
Removal of Pump Device
Installation of Pump Device
Disassembly of Pump Device
Assembly of Pump Device
Control Valve
Removal of Control Valve
Installation of Control Valve
Structure of Control Valve
Disassembly of Body
Assembly of Body
Disassembly of Boom Anti-Drift Valve
Assembly of Boom Anti-Drift Valve
Disassembly of Spool
Assembly of Spool
Disassembly of Arm Regenerative Valve and Orifice
Assembly of Arm Regenerative Valve and Orifice
Swing Device
Removal of Swing Device
Installation of Swing Device
Disassembly of Swing Reduction Gear
Assembly of Swing Reduction Gear
Disassembly of Swing Motor
Assembly of Swing Motor
Pilot Valve
Removal of Pilot Valve (Left)
Installation of Pilot Valve (Left)
Removal of Pilot Valve (Right)
Installation of Pilot Valve (Right)
Disassembly of Pilot Valves (Left and Right)
Assembly of Pilot Valves (Left and Right)
Removal of Travel Pilot Valve
Installation of Travel Pilot Valve
Disassembly of Travel Pilot Valve
Assembly of Travel Pilot Valve
Removal of Boom Swing Pilot Valve
Installation of Boom Swing Pilot Valve
Disassembly of Boom Swing Pilot Valve
Assembly of Boom Swing Pilot Valve
Removal of Blade Pilot Valve
Installation of Blade Pilot Valve
Disassembly of Blade Pilot Valve
Assembly of Blade Pilot Valve
Removal of Auxiliary Pilot Valve
Installation of Auxiliary Pilot Valve
Disassembly of Auxiliary Pilot Valve
Assembly of Auxiliary Pilot Valve
Solenoid Valve
Removal of 2-Spool Solenoid Valve
Installation of 2-Spool Solenoid Valve
Disassembly of 2-Spool Solenoid Valve Unit
Assembly of 2-Spool Solenoid Valve Unit
Removal of Torque Control Solenoid Valve (Only Machine with Air Conditioner (Option) Attached)
Installation of Torque Control Solenoid Valve (Only Machine with Air Conditioner (Option) Attached)
Disassembly of Torque Control Solenoid Valve (Only Machine with Air Conditioner (Option) Attached)
Assembly of Torque Control Solenoid Valve (Only Machine with Air Conditioner (Option) Attached)
UNDERCARRIAGE
Swing Bearing
Removal of Swing Bearing
Installation of Swing Bearing
Travel Device
Removal of Travel Device
Installation of Travel Device
Disassembly of Travel Reduction Gear
Assembly of Travel Reduction Gear
Disassembly of Travel Motor
Assembly of Travel Motor
Disassembly of Brake Valve
Assembly of Brake Valve
Center Joint
Removal of Center Joint
Installation of Center Joint
Disassembly of Center Joint
Assembly of Center Joint
Track Adjuster
Removal of Track Adjuster
Installation of Track Adjuster
Disassembly of Track Adjuster
Assembly of Track Adjuster
Front Idler
Removal of Front Idler
Installation of Front Idler
Disassembly of Front Idler
Assembly of Front Idler
Upper and Lower Rollers
Removal of Upper Roller
Installation of Upper Roller
Removal of Lower Roller
Installation of Lower Roller
Track
Removal of Track (Rubber Crawler)
Installation of Track (Rubber Crawler)
Removal of Track (Steel Crawler)
Installation of Track (Steel Crawler)
Blade Cylinder
Removal of Blade Cylinder
Installation of Blade Cylinder
Disassembly of Blade Cylinder
Assembly of Blade Cylinder
FRONT ATTACHMENT
Front Attachment
Removal of Front Attachment
Installation of Front Attachment
Cylinder
Removal of Boom Cylinder
Installation of Boom Cylinder
Disassembly of Boom Cylinder
Assembly of Boom Cylinder
Removal of Arm Cylinder
Installation of Arm Cylinder
Disassembly of Arm Cylinder
Assembly of Arm Cylinder
Removal of Bucket Cylinder
Installation of Bucket Cylinder
Disassembly of Bucket Cylinder
Assembly of Bucket Cylinder
Removal of Boom Swing Cylinder
Installation of Boom Swing Cylinder
Disassembly of Boom Swing Cylinder
Assembly of Boom Swing Cylinder
Hose Rupture Valve
Removal of Hose Rupture Valve for Boom Cylinder
Installation of Hose Rupture Valve for Boom Cylinder
Structure of Hose Rupture Valve for Boom Cylinder
Removal of Hose Rupture Valve for Arm Cylinder
Installation of Hose Rupture Valve for Arm Cylinder
Structure of Hose Rupture Valve for Arm Cylinder
SERVICE MANUAL REVISION REQUEST FORM
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