Technical Manual Hitachi ZW40-5B, ZW50-5B Wheel Loader | TONBC-EN-00

Technical Manual Hitachi ZW40-5B, ZW50-5B Wheel Loader TONBC-EN-00 (Preview)

TONBC-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
SECTION AND GROUP CONTENTS
SECTION 1 GENERAL
Group 1 Specifications
Specifications
Group 2 Component Layout
Main Component (Overview)
Main Components (Vehicle)
Electrical System (Overview)
Engine
Pump Device
HST Motor
Control Valve
Group 3 Component Specifications
Engine
Engine Accessories
Hydraulic Component
Electrical Component
SECTION 2 SYSTEM
Group 1 Hydraulic System
Outline
Main Circuit
HST Circuit
Brake Circuit
Group 2 Electrical System
Outline
Main Circuit
Electric Power Circuit (Key Switch: OFF)
Electric Power Circuit (Key Switch: ON)
CAN Circuit
Preheating Circuit (Key Switch: ON)
Engine Starting Circuit (Key Switch: START)
Charging Circuit (Key Switch: ON)
Surge Voltage Prevention Circuit (Key Switch: OFF)
Engine Stop Circuit (Key Switch: OFF)
Travel System Circuit
Parking Brake Circuit (Parking Brake Switch: ON2 Position)
Parking Brake Circuit (Parking Brake Switch: ON1 Position)
Travel Circuit (Forward/Reverse Lever: Forward Position)
Travel Circuit (Forward/Reverse Lever: Neutral Position)
Travel Circuit (Forward/Reverse Lever: Reverse Position)
Light/Horn Circuit
Headlight Circuit
Turn Signal Light Circuit
Brake Light Circuit
Horn Circuit
Reverse Light / Reverse Buzzer Circuit (Forward/Reverse Lever: Reverse Position)
Hazard Light Circuit (Option) (Key Switch: OFF Position)
Group 3 ECM System
Outline
Fuel Injection Control
EGR Control
SECTION 3 COMPONENT OPERATION
Group 1 Pump Device
Outline
HST Pump
Operational Principle
Displacement Angle Control Cylinder
When in Neutral
DA Valve
Forward/Reverse Control Solenoid Valve
High-Pressure Relief Valve
Low-Pressure Relief Valve
Main Pump, HST Charging Pump
Group 2 Control Valve
Outline (Manually Operated Type)
Hydraulic Circuit
Main Relief Valve
Overload Relief Valve (Bucket Side)
Make-Up Valve
Group 3 Steering Valve
Outline
Structure
Operation
Main Relief Valve
Check Valve
Group 4 HST Motor
Outline
Travel Motor
Regulator
Constant Pressure Control Valve
Travel Mode Control Spool
Motor Displacement Angle Control Solenoid Valve
Group 5 Reduction Gear
Outline
Structure
Service Brake
Parking Brake
Group 6 Axle
Outline
Differential
Limited Slip Differential (LSD) (Option)
Final Drive / Axle Shaft
Group 7 Brake Master Cylinder
Outline
Structure
Operation
Group 8 Others
Propeller Shaft
Inching Valve
Parking Brake Solenoid Valve
HST Cooler Relief Valve
HST Oil Filter
Hydraulic Oil Return Filter
SERVICE MANUAL REVISION REQUEST FORM