Technical Manual Hitachi ZW370-5B Wheel Loader | TONHE-EN-00

Technical Manual Hitachi ZW370-5B Wheel Loader TONHE-EN-00 (Preview)

TONHE-EN-00
INTRODUCTION
To The Reader
Additional References
Manual Composition
Page Number
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 Component
Main Component
Electric Component Layout (Overview)
Electrical System (Cab)
Engine
Hydraulic Pump
Transmission and Torque Converter Assembly
Control Valve
Brake Charge Valve
Steering Valve
Combination Valve (Brake Manifold Valve)
Flow Regulator Valve
Emergency Steering Pump (Option)
Ride Control Valve (Option)
Group 3 Component Specifications
Engine
Engine Accessories
Hydraulic Component
Electrical Component
SECTION 2 SYSTEM
Group 1 Controller
Outline
CAN Circuit
Group 2 Control System
Outline
Engine Control
Pump Control
Transmission Control
Fan Control, Valve Control
Other Controls
Combined Electric and Hydraulic Control Circuit
Group 3 ECM System
Outline
Fuel Injection Control
EGR Control
Preheating Control
Variable Turbocharger Control
Muffler Filter
Operation
Muffler Filter Regeneration Control
Group 4 Hydraulic System
Outline
Pilot Circuit
Brake Priority Circuit
Service Brake Circuit
Parking Brake Circuit
Auto Brake Circuit
Lift Arm / Bucket Operation Control Circuit
Fan Circuit
Main Circuit
Steering Priority Circuit
Steering Operation Control Circuit
Neutral Circuit
Flow Rate Control Circuit
Relief Circuit
Other Circuits
Pump Control Circuit
Parallel Circuit Flow Rate Control
Single Operation Circuit
Combined Operation Circuit
Muffler Filter Regeneration Control Circuit
Ride Control Circuit (Option)
Emergency Steering Circuit (Option)
Group 5 Electrical System
Outline
Main Circuit
Electric Power Circuit (Key Switch: OFF)
CAN Circuit
Accessory Circuit (Key Switch: ACC)
Starting Circuit (Key Switch: START)
Neutral Engine Start Circuit
Charging Circuit (Key Switch: ON)
Surge Voltage Prevention Circuit
Pilot Shut-Off Circuit (Key Switch: ON)
Auto Shut Down Circuit
Engine Stop Circuit
Monitor Circuit
Air Conditioner Circuit
Steering Column Monitor Circuit
Head Light Circuit
Hazard Light Circuit (Key Switch: OFF)
Turn Signal Light Circuit
Horn Circuit (Key Switch: OFF)
Reverse Light/Buzzer Circuit
Brake Light Circuit
Parking Brake Circuit
Accessory Circuit
Work Light Circuit
Wiper Circuit
Cab Light Circuit
SECTION 3 COMPONENT OPERATION
Group 1 Pump Device
Hydraulic Pump Outline
Main Hydraulic Pump
Regulator
Pilot Pump
Pump Delivery Pressure Sensor
Group 2 Control Valve
Outline
Hydraulic Circuit
Main Relief Valve
Main Relief Valve Operation
Overload Relief Valve (with Make-Up Function)
Overload Relief Valve Operation
Make-up Valve Operation
Bleed-Off Compensation Spool
Bleed-Off Compensator
Bucket Spool
Lift Arm Spool
Lift Arm Flow Rate Control Valve
Ride Control (Option)
Pump Control Valve (Negative Control Relief Valve)
Group 3 Cooling Fan System
Cooling Fan System Layout
Fan Pump (Pilot Pump)
Fan Motor
Fan Control Valve
Group 4 Steering Pilot Valve
Outline
Location
Overview
Structure
Operation
Group 5 Steering Valve
Outline
Operation
Steering Valve Meter-In Compensator
Steering Main Relief Valve
Steering Overload Relief Valve
Steering Spool Variable Orifice
Steering Pilot Circuit and Its Operation
Flow Amplifier Notch and Pilot Orifice
Group 6 Pilot Valve
Outline (Fingertip Control Type Pilot Valve for Front Attachment)
Operation
Electromagnetic Detent
Outline (Joystick Type Pilot Valve for Front Attachment)
Operation
Electromagnetic Detent
Group 7 Charging Circuit
Outline
Brake Charge Valve
Combination Valve (Manifold Block)
Combination Valve (Solenoid Valve Block)
Combination Valve (Reducing Valve Block)
Service Brake Accumulator
Group 8 Drive Unit
Outline
Right Hand Side View of Transmission
Left Hand Side View of Transmission
Torque Converter (Lock-Up)
Transmission
Operation of Transmission
Clutch Pack
Power Flow Path in the Transmission
Transmission Control Valve
Drive Unit Circuit
Group 9 Axle
Outline
Rear Axle Assembly
Front Axle Assembly
Differential
Torque Proportioning Differential (TPD)
Limited Slip Differential (LSD) (Option)
Service Brake
Parking Brake
Parking Brake Manual Release
Group 10 Brake Valve
Outline
Service Brake Operation
Auto Brake Operation
Group 11 Others
Propeller Shaft
Flow Regulator Valve
Emergency Steering Pump (Option)
Ride Control Valve (Option)
Ride Control Accumulator
Priority Hammer Valve
SERVICE MANUAL REVISION REQUEST FORM