Hitachi ZW250-6 Wheel Loader WNEM50-EN-00 (2018.08.06) (Preview)
WNEM50-EN-00
CONTENTS
INTRODUCTION
SYMBOL AND ABBREVIATION
SAFETY
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
Group 4 Bleeding Air
Bleed Air from the Hydraulic System.
Bleed Air from the Fuel System
Bleeding Air from Brake (Axle)
Group 5 Preparation
Preparations for Inspection and Maintenance
Releasing Pressure from Front Attachment
Hydraulic Circuit
Releasing Pressure from Ride Control
Accumulator
Releasing Pressure from Parking Brake
Accumulator
Releasing Pressure from Hydraulic Oil Tank
Releasing Pressure from Reserve Tank
SECTION 2
MAINTENANCE STANDARD
Group 1 Body
Center Hinge
Pilot Valve (Two Lever Type )
Group 2 Front Attachment
Pin and Bushing
Standard Dimensions for Lift Arm and Bucket
Cylinder
SECTION 3
BODY
Group 1 Cab
Removal and Installation of Cab
Group 2 Counterweight
Removal and Installation of Counterweight
Group 3 Center Hinge
Removal and Installation of Center Hinge
Group 4 Engine
Removal and Installation of Engine
Group 5 Radiator Assembly
Removal and Installation of Radiator
Assembly
Group 6 Hydraulic Oil Tank
Removal and Installation of Hydraulic Oil
Tank
Group 7 Fuel Tank
Removal and Installation of Fuel Tank
Group 8 Pump Device
Removal and Installation of Pump Device
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
Group 9 Control Valve
Removal and Installation of Control Valve
Disassembly of Control Valve
Assembly of Control Valve
Group 10 Pilot Valve
Removal and Installation of Pilot Valve
(Single Lever Type)
Removal and Installation of Pilot Valve (Two
Lever Type)
Disassembly of Pilot Valve (Single Lever
Type)
Assembly of Pilot Valve (Single Lever Type)
Disassembly of Pilot Valve (Two Lever Type)
Assembly of Pilot Valve (Two Lever Type)
Group 11 Brake Charge Valve
Removal and Installation of Brake Charge
Valve
Structure of Brake Charge Valve
Removal and Installation of Brake
Accumulator
Group 12 Manifold Valve
Removal and Installation of Manifold Valve
Disassembly of Manifold Valve
Assembly of Manifold Valve
Group 13 Solenoid Valve
Removal and Installation of 2-Spool Solenoid
Valve Unit
Structure of 2-Spool Solenoid Valve Unit
Removal and Installation of Parking Brake
Solenoid Valve Unit
Structure of Parking Brake Solenoid Valve
Unit
Structure of Parking Brake Solenoid Valve
Group 14 Flow Regulator Valve
Removal and Installation of Flow Regulator
Valve
Structure of Flow Regulator Valve
Group 15 Cooling Fan System
Removal and Installation of Fan Valve
Structure of Fan Valve
Removal and Installation of Fan Motor
Structure of Fan Motor
Removal and Installation of Pilot Pump
Disassembly of Pilot Pump
Assembly of Pilot Pump
Group 16 Ride Control Accumulator
Removal and Installation of Ride Control
Accumulator
Group 17 Battery Disconnect Switch
Removal and Installation of Battery
Disconnect Switch
Group 18 Aftertreatment Device
Removal and Installation of Aftertreatment
Device
Group 19 DEF Tank
Removal and Installation of DEF Tank
Group 20 Coolant Control Valve
Removal and Installation of Coolant Control
Valve
Group 21 DEF Supply Module
Removal and Installation of DEF Supply
Module
Group 22 Exterior Components
Removal and Installation of Exterior
Components
SECTION 4
TRAVEL SYSTEM
Group 1 Tire
Removal and Installation of Front Tire
Removal and Installation of Rear Tire
Group 2 Drive Unit
Removal and 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 friction pad)
Group 3 Axle
Removal and Installation of Front Axle
Removal and Installation of Rear Axle
Disassembly of Axle
Assembly of Axle
Group 4 Propeller Shaft
Removal and Installation of Propeller Shaft
Group 5 Brake Valve
Removal and Installation of Brake Valve
Disassembly of Brake Valve
Disassembly of Brake Valve
Assembly of Brake Valve
Assembly of Brake Valve
Group 6 Steering Device
Removal and Installation of Steering Pilot
Valve
Disassembly of Steering Pilot Valve
Assembly of Steering Pilot Valve
Removal and Installation of Steering Valve
(Without Emergency Steering)
Removal and 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 and Installation of Steering Cylinder
Disassembly of Steering Cylinder
Assembly of Steering Cylinder
Removal and Installation of Steering
Accumulator
Removal and Installation of Left Stop Valve
Removal and Installation of Right Stop Valve
Disassembly of Stop Valve
Assembly of Stop Valve
Group 7 Emergency Steering Device
Removal and Installation of Emergency
Steering Pump
SECTION 5
FRONT ATTACHMENT
Group 1 Front Attachment
Removal and Installation of Front
Attachment
Removal and Installation of Bell Crank
Removal and Installation of Bucket
Removal and Installation of Bushing
Group 2 Cylinder
Removal and Installation of Lift Arm Cylinder
Removal and 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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