Technical Manual Hitachi ZW120-6 Wheel Loader | TONSA60-EN-00

Technical Manual Hitachi ZW120-6 Wheel Loader TONSA60-EN-00 (Preview)

TONSA60-EN-00
CONTENTS
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 COMPONENT
ELECTRICAL SYSTEM (OVERVIEW)
AIR CLEANER, RADIATOR, AND SURROUNDINGS
BATTERY BOX
FRAME: REAR RIGHT INSIDE
HYDRAULIC OIL TANK
FUEL TANK
CAB
FRONT CONSOLE
RIGHT CONSOLE
REAR CONSOLE
CONTROL UNIT
ENGINE
AFTERTREATMENT DEVICE
TRANSMISSION/HST MOTOR
PUMP DEVICE
CONTROL VALVE
PILOT Lock SOLENOID VALVE
RIDE CONTROL VALVE
DEF Tank
DEF SUPPLY MODULE
Group 3 Component Specifications
Engine
Engine Accessories
Hydraulic Component
Electrical Component
SECTION 2 SYSTEM
Group 1 Controller
OVERVIEW
CAN CIRCUIT
Group 2 Control System
OVERVIEW
ENGINE CONTROL (ECM)
HST PUMP/MOTOR, TRANSMISSION CONTROL
VALVE CONTROL
OTHER CONTROL
CONTROL BY ELECTRICAL AND HYDRAULIC COMBINED CIRCUIT
Group 3 Engine System
OVERVIEW
FUEL INJECTION CONTROL
FUEL INJECTION AMOUNT CORRECTION CONTROL
EGR CONTROL
PREHEATING CONTROL
ALARM CONTROL
UREA SCR SYSTEM
ENGINE OUTPUT RESTRICTION CONTROL (INDUCEMENT)
AFTERTREATMENT DEVICE
AFTERTREATMENT DEVICE REGENERATION CONTROL
Group 4 Hydraulic System
OVERVIEW
MAIN CIRCUIT
OVERVIEW
STRUCTURE
OPERATION
HST CIRCUIT
PILOT CIRCUIT
TRANSMISSION CIRCUIT
SERVICE BRAKE CIRCUIT
Group 5 Electrical System
OVERVIEW
MAIN CIRCUIT
ELECTRIC POWER CIRCUIT (KEY SWITCH: OFF)
CAN CIRCUIT
ACCESSORY CIRCUIT (KEY SWITCH: ACC)
STARTING CIRCUIT (KEY SWITCH: START)
CHARGING CIRCUIT (KEY SWITCH: ON)
SURGE VOLTAGE PREVENTION CIRCUIT
LOCK CIRCUIT (KEY SWITCH: ON)
ENGINE STOP CIRCUIT
STEERING COLUMN BOX CIRCUIT
HEADLIGHT CIRCUIT
HAZARD LIGHT CIRCUIT (KEY SWITCH: OFF)
TURN SIGNAL LIGHT CIRCUIT
HORN CIRCUIT (KEY SWITCH: OFF)
BACK BUZZER, REVERSE LIGHT 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
OVERVIEW
ROTARY GROUP
DISPLACEMENT CYLINDER
DA VALVE
FORWARD/REVERSE SELECTOR CONTROL SOLENOID VALVE
CUTOFF VALVE
TRAVEL RELIEF VALVE
CHARGE RELIEF VALVE
HST CHARGE PUMP
MAIN PUMP, BRAKE/TRANSMISSION PUMP
Group 2 Control Valve
Overview
Hydraulic Circuit
Main Relief Valve
Overload Relief Valve (with Make-Up Function)
Make-Up Valve
Group 4 Steering Valve
OVERVIEW
STRUCTURE
OPERATION
Group 5 HST Motor
OVERVIEW
ROTARY GROUP
REGULATOR
MOTOR DISPLACEMENT ANGLE CONTROL
MOTOR DISPLACEMENT ANGLE CONTROL SOLENOID VALVE
TRAVEL RESTRICTION SOLENOID VALVE
FLUSHING VALVE
Group 6 Pilot Valve
OVERVIEW (JOYSTICK TYPE PILOT VALVE FOR FRONT ATTACHMENT)
OPERATION
ELECTROMAGNETIC DETENT
Group 8 Transmission
Outline
Transmission Part
Travel Mode Selector Solenoid Valve Unit
Accumulator
SOLENOID VALVE
Parking Brake
Group 9 Axle
OVERVIEW
DIFFERENTIAL
TORQUE PROPORTIONING DIFFERENTIAL (TPD)
LIMITED SLIP DIFFERENTIAL (LSD) (OPTIONAL)
SERVICE BRAKE
FINAL DRIVE / AXLE SHAFT
Group 10 Brake Valve
OVERVIEW
STRUCTURE
OPERATION
Group 11 Priority Valve
OVERVIEW
STRUCTURE
OPERATION
Group 12 Ride Control Valve
Outline
Charge-Cut Spool
Overload Relief Valve
Drain Plug
Group 13 Others
PROPELLER SHAFT
RIDE CONTROL ACCUMULATOR
INCHING VALVE
PILOT SHUT-OFF SOLENOID VALVE
SOLENOID VALVE
FILTER