Technical Manual Hitachi ZX870-6, ZX870LC-6, ZX890H-6, ZX890LCH-6, ZX890R-6, ZX890LCR-6 | TOJBL40-EN-00

Technical Manual Hitachi ZX870-6, ZX870LC-6, ZX890H-6, ZX890LCH-6, ZX890R-6, ZX890LCR-6 TOJBL40-EN-00 (Preview)

TOJBL40-EN-00
CONTENTS
INTRODUCTION
SYMBOL AND ABBREVIATION
SECTION AND GROUP CONTENTS
SECTION 1 GENERAL
Group 1 Specifications
Specifications
Working Ranges
Group 2 Component Layout
Main Component
Around Radiator
Electrical System (Overview)
Fuel Pump
Electrical System (Rear Tray)
Electrical System (Switch Panel)
Electrical System (Cab Behind Side)
Around Horn
Around Oil Cooler
Auto Lubricating System
Boom Upper Side
Engine
Aftertreatment Device
Aftertreatment Device
Pump Device
Control Valve
Check Valve
Signal Control Valve
4-Spool Solenoid Valve Unit
Fan Valve (Oil Cooler, Rdiator)
2-Spool Solenoid Valve Unit
DEF Tank
DEF Supply Module
Expansion Tank
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
Valve Control (Standard)
Other Control
Group 3 Engine System
Outline
ECM System
Fuel Injection Control
Fuel Injection Amount Correction Control
EGR Control
Preheating Control
Variable Turbocharger Control
Alarm Control
Urea SCR System
Engine Output Restriction Control (INDUCEMENT)
Aftertreatment Device
Aftertreatment Device Regeneration Control
Group 4 Hydraulic System
Outline
Pilot Circuit
Main Circuit
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)
Charging Circuit (Key Switch: ON)
Surge Voltage Prevention Circuit
Pilot Shut-Off Circuit (Key Switch: ON)
Auto Shut-Down Circuit/Automatic Engine Stop Circuit at Low Temperature
Engine Stop Circuit
Monitor Circuit
Security Circuit
Radio Circuit
Air Conditioner Circuit
Accessory Circuit
Work Light Circuit
Wiper/Washer Circuit
Cab Light Circuit
SECTION 3 COMPONENT OPERATION
Group 1 Pump Device
Outline
Main Pump
Regulator (Main Pump)
Pump Control Solenoid Valve (Main Pump)
Fan Pump
Regulator (Fan Pump)
Pump Control Solenoid Valve (Fan Pump)
Pilot Pump
Pump Delivery Pressure Sensor
Pump Control Pressure Sensor
Group 2 Swing Device
Outline
Swing Reduction Gear
Swing Motor
Swing Parking Brake
Valve Unit
Group 3 Control Valve
Outline
Hydraulic Circuit
Flow Combiner Valve
Main Relief valve
Overload Relief Valve (with Make-Up Function)
Boom Overload Relief Valve (Low Pressure)
Regenerative Valve
Anti-Drift Valve
Flow Rate Control Valve
Boom Lower Meter-In Cut Valve
Bypass Shut-Out Valve
Group 4 Pilot Valve
Outline
Operation (Front Attachment/Swing and Travel Pilot Valves)
Shockless Function (Only for Travel Pilot Valve)
Group 5 Travel Device
Outline
Travel Reduction Gear
Travel Motor
Parking Brake
Travel Brake Valve
Overload Relief Valve
Travel Mode Control
Group 6 Signal Control Valve
Outline
Pilot Port
Shuttle Valve
Shockless Valve
Pump 1 and Pump 2 Flow Rate Control Valves
Arm Flow Rate Control Valve Control Spool, Flow Combiner Valve Control Spool, Swing Parking Brake Release Spool
Group 7 Others (Upperstructure)
Pilot Shut-Off Solenoid Valve
Solenoid Valve
Fan Motor
Fan Valve
Pilot Relief Valve
Shockless Valve
Accumulator (Pilot Circuit)
Distribution Valve
Group 8 Others (Undercarriage)
Swing Bearing
Centerjoint
Track Adjuster
SERVICE MANUAL REVISION REQUEST FORM