Content

General

• Safety hints
• Specifications

Structure and function

• Pump device
• Main control valve
• Swing device
• Travel device
• RCV lever
• RCV pedal

Hydraulic system

• Hydraulic circuit
• Main circuit
• Pilot circuit
• Single operation
• Combined operation

Electrical system

• Component location
• Electrical circuit
• Electrical component specification
• Connectors

Mechatronics system

• Outline
• Mode selection system
• Automatic deceleration system
• Power boost system
• Travel speed control system
• Automatic warming up function
• Engine overheat prevention function
• Anti-restart system
• Self-diagnostic system
• Engine control system
• EPPR(electro proportional pressure reducing) valve
• Monitoring system

Troubleshooting

• Before troubleshooting
• Hydraulic and mechanical system
• Electrical system
• Mechatronics system

Maintenance standard

• Operational performance test
• Major components
• Track and work equipment

Disassembly and assembly

• Precaution
• Tightening torque
• Pump device
• Main control valve
• Swing device
• Travel device
• Rcv lever
• Turning joint
• Boom, arm and bucket cylinder
• Undercarriage

Work equipment

Component mounting torque

• Introduction guide
• Engine system
• Electric system
• Hydraulic system
• Undercarriage
• Structure
• Work equipment