CONTENTS
Diagnosing Procedure
Monitor Unit
Dr.ZX
ICF (Information Controller)
Component Layout
2. Operational Principle, PDF, 483 Pages
Component Layout
TO2 System
Group 1 Controller
Outline
Can: Controller Area Network
(Network Provided for Machine)
MC: Main Controller
ECM: Engine Control Module
ICF: Information Controller
Monitor Unit
Option Controller
Steering Column Monitor
Group 2 Control System
Outline
Engine Control
Pump Control
Valve Control
Other Controls
Option Controller Control
Electric and Hydraulic
Composite Circuit Control
Group 3 ECM System
Outline
Fuel Injection Control
Fuel Injection Amount Correction Control
Preheating Control
EGR (Exhaust Gas Recirculation)
Control
Engine Stop Control
Group 4 Hydraulic System
Outline
Pilot Circuit
Service Brake Circuit
Steering Circuit
Main Circuit
Group 5 Electrical System
Outline
Main Circuit
ElectricPower Circuit (Key Switch: OFF)
Accessory Circuit
Starting Circuit (Key Switch: START)
Charging Circuit (Key Switch: ON)
Serge Voltage Prevention Circuit
Pilot Shut-OffCircuit (Key Switch: ON)
Security LockCircuit
Engine Stop Circuit (Key Switch: OFF)
Security Horn Circuit
Wiper/Washer Circuit
Light Circuit
SECTION 3. COMPONENT OPERATION
Group 1 Pump Device
Outline
Main Pump
Regulator
Solenoid Valve
Pilot Pump, Steering Pump
Pump Delivery Pressure Sensor
Pump Control Pressure Sensor
Group 2 Swing Device
Outline
Swing Reduction Gear
Swing Motor
Swing Parking Brake
Valve Unit
Combination Valve.
Group 3 Control Valve
Outline
HydraulicCircuit
Main Relief Valve
Overload Relief Valve
Anti-DriftValve
Regenerative Valve
Flow Rate Control Valve
BypassShut-Out Valve
Auxiliary Flow Combiner Valve
Group 4 Pilot Valve
Outline
Operation
Group 5 Electric Lever
Outline
Operation
Group 6 Transmission
Outline
Transmission
Shift InterlockControl
Shock Reducing Function
Disconnect Device
Group 7 Axle
Front Axle
Differential Gear
Reduction Gear
Steering Cylinder
Rear Axle
Group 8 Travel Motor
Outline
Rotor Section
Regulator
Overload Relief Valve
Travel Brake Valve
Group 9 Signal Control Valve
Outline
Pilot Port
Shuttle Valve
ShocklessValve
Pump 1 and Pump 2 Flow Rate
Control Valves
Bucket Flow Rate Control Valve
Control Spool, Swing Parking Brake
Release Spool.
Group 10 Steering Valve
Outline
Steering Valve
Operation
Overload Relief Valve
Make-Up Valve
Priority Valve
Operation
Relief Valve
Group 11 Brake Valve
Outline
Operation
Group 12 Others (Upperstructure
Pilot Shut-OffSolenoid Valve
Transmission Changeover
Solenoid Valve
Solenoid Valve
Travel Shockless Valve
Accumulator Charging Valve
HoseRupture Valve
Accumulator
Pilot Relief Valve
Group 13 Others (Undercarriage)
Swing Bearing
Center Joint
Slip Ring
Cylinder.