Hitachi ZW220-7 Wheel Loader WNUD50-EN-00 (Preview)
WNUD-50-EN-00(1)(20210127)
WNUD-50-EN-00
INTRODUCTION
To The Reader
Additional References
Manual Composition
Page Number
Trademark
Safety Alert Symbol and Headline Notations
Units Used
SYMBOL AND ABBREVIATION
Symbol and Abbreviation
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 Protective Clothing
Protect Against Noise
Inspect Machine
General Precautions for the Cab
Use Handrails and Steps
Never Ride Attachment
Adjust the Operator’s Seat
Ensure Safety Before Rising from or Leaving Operator’s Seat
Fasten Your Seat Belt
Move and Operate Machine Safely
Handle Starting Aids Safely
Operate Only from Operator’s Seat
Jump Starting
Investigate Job Site Beforehand
Equipment of Head Guard, ROPS, FOPS
Provide Signals for Jobs Involving Multiple Machines
Keep Riders Off Machine
Drive Safely
Drive Machine Safely (Work Site)
Drive Safely with Bucket Loaded
Drive on Snow Safely
Travel on Public Roads Safely
Avoid Injury from Roll Away Accidents
Avoid Accidents from Backing Up and Turning
Avoid Positioning Bucket or Attachment OverAnyone
Avoid Tipping
Never Undercut a High Bank
Dig with Caution
Perform Truck Loading Safely
Avoid Power Lines
Precautions for Operation
Precautions for Lightning
Protect Against Flying Debris and Falling Object
Object Handling
Protect Against Flying Debris
Park Machine Safely
Store Attachments Safely
Transport Safely
Handle Fluids Safely−Avoid Fires
Practice Safe Maintenance
Warn Others of Service Work
Support Machine Properly
Stay Clear of Moving Parts
Support Maintenance Properly
Prevent Parts from Flying
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
Precautions for Diesel Exhaust Fluid (DEF)
Remove Paint Before Welding or Heating
Beware of Asbestos and Silica Dust and Other Contamination
Prevent Battery Explosions
Service Air Conditioning System Safely
Handle Chemical Products Safely
Dispose of Waste Properly
Notes on Aftertreatment Device
Precautions for Communication Terminal
Precautions for Communication Terminal Equipment
Precaution for Joystick Steering System
Precautions for Aerial Angle (If Equipped)
Precautions for Rear Obstacle Detection System(If Equipped)
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 of Front Attachment
Painting of Cab
Painting of Body
Painting of Wheel
Painting of Rear Axle
Painting of Front Axle
Bleeding Air
Bleeding Air from Hydraulic System
Bleeding Air from Pump
Bleeding Air from Hydraulic Circuit
Bleeding Air from Fuel System
Bleeding Air from Brake (Axle)
Preparation
Preparation before Inspection and Maintenance
Pressure Release from Front Attachment Hydraulic Circuit
Pressure Release from Ride Control Accumulator
Pressure Release from Parking Brake Accumulator
Pressure Release from Hydraulic Oil Tank
Pressure Release from Expansion Tank
MAINTENANCE STANDARD
Body
Maintenance Standard for Center Hinge
Front Attachment
Maintenance Standard for Pin and Bushing
Standard Dimensions for Lift Arm and Bucket Connection
Maintenance Standard for Cylinder
BODY
Cab
Removal of Related Parts of Cab
Removal of Related Parts of Cab (With Joystick Steering)
Removal of Cab Body
Removal of Cab Body (With Joystick Steering)
Installation of Cab Body
Installation of Cab Body (With Joystick Steering)
Installation of Related Parts of Cab
Installation of Related Parts of Cab (With Joystick Steering)
Counterweight
Removal of Counterweight
Installation of Counterweight
Center Hinge
Removal of Related Parts of Center Hinge
Removal of Center Hinge
Installation of Center Hinge
Installation of Related Parts of Center Hinge
Engine
Preparation before Removal of Engine
Removal of Covers and Related Parts Around the Engine
Removal of Wire Harnesses and Hoses Around the Engine
Removal of Engine
Installation of Engine
Installation of Wire Harnesses and Hoses Around the Engine
Installation of Related Parts Around the Engine
Work after Installation of Engine and Installation of Covers
Radiator Assembly
Removal of Radiator Assembly
Installation of Radiator Assembly
Hydraulic Oil Tank
Removal of Hydraulic Oil Tank (With Emergency Steering)
Installation of Hydraulic Oil Tank (With Emergency Steering)
Fuel Tank
Removal of Fuel Tank
Installation of Fuel Tank
Pump Device
Removal of Pump Device (With Emergency Steering)
Installation of Pump Device (With Emergency Steering)
Disassembly of Pump Device
Assembly of Pump Device
Disassembly of Main Pump
Assembly of Main Pump
Disassembly of Regulator
Assembly of Regulator
Disassembly of Priority Valve
Assembly of Priority Valve
Structure of Pilot Pump
Control Valve
Removal of Control Valve
Installation of Control Valve
Disassembly of Control Valve
Disassembly of Control Valve
Assembly of Control Valve
Assembly of Control Valve
Control Levers
Removal of Control Levers
Installation of Control Levers
Removal of MF Lever
Installation of MF Lever
Brake Charge Valve
Removal of Brake Charge Valve
Installation of Brake Charge Valve
Structure of Brake Charge Valve
Removal of Brake Accumulator
Installation of Brake Accumulator
Manifold Valve
Removal of Manifold Valve
Installation of Manifold Valve
Disassembly of Manifold Valve
Assembly of Manifold Valve
Solenoid Valve
Removal of 2-Spool Solenoid Valve Unit
Installation of 2-Spool Solenoid Valve Unit
Structure of 2-Spool Solenoid Valve Unit
Removal of 4-Spool Solenoid Valve Unit
Installation of 4-Spool Solenoid Valve Unit
Structure of 4-Spool Solenoid Valve Unit
Removal of Parking Brake Solenoid Valve Unit
Installation of Parking Brake Solenoid Valve Unit
Structure of Parking Brake Solenoid Valve Unit
Cooling Fan System
Removal of Fan Valve
Installation of Fan Valve
Structure of Fan Valve
Removal of Fan Motor
Installation of Fan Motor
Structure of Fan Motor
Removal of Fan Pump
Installation of Fan Pump
Disassembly of Fan Pump
Assembly of Fan Pump
Ride Control Accumulator
Removal of Ride Control Accumulator
Installation of Ride Control Accumulator
Battery Disconnect Switch
Removal of Battery Disconnect Switch
Installation of Battery Disconnect Switch
Aftertreatment Device
Removal of Aftertreatment Device
Installation of Aftertreatment Device
DEF Tank
Removal of DEF Tank
Installation of DEF Tank
Coolant Control Valve
Removal of Coolant Control Valve
Installation of Coolant Control Valve
DEF Supply Module
Removal of DEF Supply Module
Installation of DEF Supply Module
Exterior Components
Composition of Exterior Components
Composition of Front Cover (101)
Composition of Front Fender (102)
Composition of Deck (103), Step (Front) (104) and Rear Fender (Front) (105)
Composition of Rear Fender (Rear) (106)
Removal of Engine Cover (107)
Installation of Engine Cover (107)
Removal of Rear Cover (108)
Installation of Rear Cover (108)
Composition of Cab Under Cover (109)
Composition of Mud Cover (Front) (110)
Composition of Mud Cover (Rear) (112)
Composition of Inspection Cover (111) and Step (Rear) (114)
Composition of Lower Cover (113)
Removal of Side Cover (Front) (116) (with Rear Fender (Rear))
Installation of Side Cover (Front) (116) (with Rear Fender (Rear))
Removal of Rear Grill (117)
Installation of Rear Grill (117)
Removal of Left Side Cover (Rear) (118)
Installation of Left Side Cover (Rear) (118)
Removal of Right Side Cover (Rear) (119)
Installation of Right Side Cover (Rear) (119)
Composition of Under Guard (Rear) (121)
Composition of Tool Box (120)
Composition of DEF Tank Box (115)
Removal of Battery Box (122)
Installation of Battery Box (122)
Composition of Under Guard (Front) (123)
WNUD-50-EN-00(2)(20210127)
TRAVEL SYSTEM
Tire
Removal of Front Tire
Installation of Front Tire
Removal of Rear Tire
Installation of Rear Tire
Drive Unit
Removal of Drive Unit
Installation of Drive Unit
Disassembly and Assembly of Drive Unit
Removal and Installation of Torque Converter
Disassembly and Assembly of Transmission
Disassembly and Assembly of Transmission Control Valve
Removal and Installation of Parking Brake (Replace the Brake Pad)
Axle
Removal of Front Axle
Installation of Front Axle
Removal of Rear Axle
Installation of Rear Axle
Disassembly of Axle
Assembly of Axle
Propeller Shaft
Removal of Propeller Shaft
Installation of Propeller Shaft
Brake Valve
Removal of Brake Valve
Installation of Brake Valve
Disassembly of Brake Valve
Disassembly of Brake Valve
Assembly of Brake Valve
Assembly of Brake Valve
Steering Device
Removal of Steering Pilot Valve
Installation of Steering Pilot Valve
Removal of Steering Pilot Valve (With Joystick Steering)
Installation of Steering Pilot Valve (With Joystick Steering)
Disassembly of Steering Pilot Valve
Assembly of Steering Pilot Valve
Removal of Steering Valve (With Emergency Steering)
Installation of Steering Valve (With Emergency Steering)
Disassembly of Steering Valve
Assembly of Steering Valve
Disassembly of Emergency Steering Check Block
Assembly of Emergency Steering Check Block
Removal of Steering Cylinder
Installation of Steering Cylinder
Disassembly of Steering Cylinder
Assembly of Steering Cylinder
Removal of Left Stop Valve
Installation of Left Stop Valve
Removal of Right Stop Valve
Installation of Right Stop Valve
Removal of Right Stop Valve (With Joystick Steering)
Installation of Right Stop Valve (With Joystick Steering)
Disassembly of Stop Valve
Assembly of Stop Valve
Emergency Steering Device
Removal of Emergency Steering Pump
Installation of Emergency Steering Pump
Joystick Steering Device
Removal of Joystick Steering Control Valve
Installation of Joystick Steering Control Valve
Structure of Joystick Steering Control Valve Assembly
Structure of Joystick Steering Control Valve
Removal of Joystick Steering Solenoid Valve
Installation of Joystick Steering Solenoid Valve
Structure of Joystick Steering Solenoid Valve Assembly
Structure of Joystick Steering Solenoid Valve
Removal of Joystick Steering Lever
Installation of Joystick Steering Lever
FRONT ATTACHMENT
Front Attachment
Removal of Front Attachment
Installation of Front Attachment
Removal of Bell Crank
Installation of Bell Crank
Removal of Bucket
Installation of Bucket
Removal of Bushing
Installation of Bushing
Cylinder
Removal of Lift Arm Cylinder
Installation of Lift Arm Cylinder
Removal of Bucket Cylinder
Installation of Bucket Cylinder
Disassembly of Lift Arm Cylinder and Bucket Cylinder
Assembly of Lift Arm Cylinder and Bucket Cylinder
SERVICE MANUAL REVISION REQUEST FORM
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