Technical Manual Hitachi ZX70-5G, ZX70LC-5G Hydraulic Excavator | TODEA-EN-01

Technical Manual Hitachi ZX70-5G, ZX70LC-5G Hydraulic Excavator TODEA-EN-01 (Preview)

TODEA-EN-01
INTRODUCTION
SYMBOL AND ABBREVIATION
SECTION AND GROUP CONTENTS
SECTION 1 GENERAL
Group 1 Specifications
Specifications
Working Ranges
Group 2 Component Layout
Main Component
Electrical System (Overview)
Electrical System (Monitor and Switches)
Electrical System (Rear Tray)
Electrical System (Battery Room)
Engine
Control Valve
Pump Device
Swing Device
Solenoid Valve Unit
Travel Device
Group 3 Component Specifications
Engine
Engine Accessories
Hydraulic Component
Electrical Component
SECTION 2 SYSTEM
Group 1 Control System
Outline
Engine Control
Valve Control
Other Control
Group 2 Hydraulic System
Outline
Pilot Circuit
Main Circuit
Group 3 Electrical System
Outline
Main Circuit
Electric Power Circuit (Key Switch: OFF)
Accessory Circuit
Electric Power Circuit (Key Switch: ON)
Light Bulb Check Circuit (Key switch: ON)
Preheating Circuit (Key Switch: ON)
Starting Circuit (Key Switch: START)
Charging Circuit (Key Switch: ON)
Surge Voltage Prevention Circuit
Engine Stop Circuit (Key Switch: OFF)
Engine Stop Circuit
SECTION 3 COMPONENT OPERATION
Group 1 Pump Device
Outline
Main Pumps 1, 2, 3
Regulator for Main Pumps 1, 2
Regulator for Main Pump 3
Pilot Pump
Group 2 Swing Device
Outline
Swing Reduction Gear
Swing Motor
Swing Parking Brake
Valve Unit
Relief Valve
Group 3 Control Valve
Outline
Hydraulic Circuit
Flow Combiner Valve
Main Relief Pressure Selection
Boom Anti-Drift Valve
Main Relief Valve
Overload Relief Valve
Group 4 Pilot Valve
Outline
Operation (Front Attachment / Swing and Travel Pilot Valves)
Operation (Auxiliary / Blade Pilot Valve)
Shockless Function (Only for Travel Pilot Valve)
Group 5 Travel Device
Outline
Travel Motor
Parking Brake
Travel Brake Valve
Travel Reduction Gear
Group 6 Others (Upperstructure)
Pilot Shut-Off Valve
Shockless Valve
2-Spool Solenoid Valve Unit
Pilot Relief Valve
Engine Fan Clutch
Group 7 Others (Undercarriage)
Swing Bearing
Center Joint
Track Adjuster
SERVICE MANUAL REVISION REQUEST FORM