Description
Doosan DX420 Crawler Excavator Shop Manual (Serial Number 5001 and Up)
Doosan DX420 Crawler Excavator Index:
Safety Precautions
Safety
Applicable Models
To the Operator of a DOOSAN Daewoo Excavator
General Safety Essentials
Location of Safety Labels
Summary of Safety Precautions for Lifting in Digging Mode
Unauthorized Modifications
General Hazard Information
Before Starting Engine
Machine Operation
Maintenance
Battery
Towing
Shipping and Transportation
Lifting With Sling
Specifications
Specification for DX420LC
General Maintenance Procedures
Safety Precautions
Applicable Models
Welding Precautions and Guidelines
Hydraulic System – General Precautions
Maintenance Service and Repair Procedure
Hydraulic System Cleanliness and Oil Leaks
Cleaning and Inspection
Standard Torques
Safety Precautions
Applicable Models
Torque Values for Standard Metric Fasteners
Torque Values for Standard U.S. Fasteners
Type 8 Phosphate Coated Hardware
Torque Values for Hose Clamps
Torque Values for Split Flanges
Torque Wrench Extension Tools
Upper Structure
Cabin
Counterweight
Fuel Tank
Swing Bearing
Swing Reduction Gear
Lower Structure and Chassis
Track Assembly
Air Conditioner SP000025
Engine and Drive Train
Drive Coupling (Main Pump)
Hydraulics
Hydraulic System Troubleshooting, Testing and Adjustment
Accumulator
Center Joint (Swivel)
Cylinders
Swing Motor
Travel Motor (With Gearbox) SP000266
Main Pump
Control Valve (KVMG-400-DA)
Remote Control Valve (Work Lever / Joystick)
Travel Control Valve (With Damper) SP000070
Solenoid Valve Assembly
Breaker EPPR Valve (Opt)
Fan Motor (Vane Type)
Gear Pump (Fan Cooling Drive)
Fan Cooling Flow In-Out Change Valve
Hydraulic Schematic (DX420LC)
Electrical System
Electrical System SP000269
Electrical Schematic (DX420LC)
Attachments
Boom and Arm
Bucket
