Part of the Doosan Repair Manuals.
Wrenching on a Doosan DX420LC, DX480LC, or DX520LC hydraulic excavator? This 878-page shop manual PDF (OEM #K1008703E) takes you from swing bearing to Rexroth main pump to track assembly. Inside: complete electrical schematics for chasing e-EPOS and charging faults, hydraulic schematics with full circuit routing, and a dedicated hydraulic troubleshooting, testing, and adjustment section. You also get teardown and rebuild procedures for cylinders, swing motor, travel motor, and the Kayaba KVMG-400-DA control valve, plus standard torque tables for metric and U.S. fasteners. Set main relief pressure to 320 kg/cm2 on the DX480LC, and check swing reduction output torque against the factory figure of 1,141 kg-m (8,250 ft lb). No more chasing wiring faults with a multimeter and a prayer. Bookmarked chapters and a real text layer mean you type the spec, find the page, and get back on the sticks.
Other editions of this manual
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety and General Information | 1-52 | Safety Precautions, Applicable Models, General Hazard Information, Maintenance Safety, Battery Safety, Towing, Shipping and Transportation |
| Specifications and General Maintenance | 53-106 | DX480LC/520LC Specifications, General Maintenance Procedures, Standard Torques, Bearing Inspection |
| Upper Structure | 107-216 | Cabin, Counterweight, Fuel Tank, Swing Bearing, Swing Reduction Gear |
| Lower Structure and Chassis | 217-296 | Track Assembly, Air Conditioner |
| Engine and Drive Train | 297-346 | Drive Coupling (Main Pump), Hydraulics, Hydraulic System Troubleshooting, Testing and Adjustment |
| Accumulator | 347-418 | Safety Precautions, Applicable Models, General Description |
| Travel Motor (with Gearbox) (A6V160HD) SP000185 | 419-482 | |
| Main Pump (Rexroth) | 483-538 | Safety Precautions, Applicable Models, A8VO200LA1KH1/63, General Repair Guidelines, Seal Kits and Sub-Assemblies, Sealing the Drive Shaft |
| Control Valve (Kayaba Model Kvmg-400-Da) | 539-596 | Safety Precautions, Applicable Models, General Description, When All Spools Are in Neutral, Single Operation, Combined Operation |
| Remote Control Valve (Work Lever / Joystick) | 597-644 | Safety Precautions, Applicable Models, General Description, Function, Torques, Tools and Materials |
| Solenoid Valve Assembly | 645-692 | Safety Precautions, Applicable Models, Package, Functions of Solenoid Valve Assembly Package, Assembly Diagram and Tools Required, Solenoid Valve Diagram |
| Gear Pump (Fan Cooling Drive) | 693-726 | Safety Precautions, Applicable Models, Disassembling Single Gear Pump, Reassembling Single Gear Pump, Disassembling Double Gear Pump(Opt), Reassembling Double Gear Pump(Opt) |
| Electrical System | 727-854 | Electrical System Overview, Electrical Schematics, Monitoring System, e-EPOS Controller, Power Mode Control, Engine Control System |
| Attachments | 855-878 | Boom and Arm, Bucket, Bucket Tooth Inspection, Bucket O-Ring Replacement |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Maximum Output Speed | 67 rpm | p. 179 |
| Maximum Output Torque | 1,141 kg•m (8,250 ft lb) | p. 179 |
| Rated Torque | 81.5 kg•m | p. 443 |
| Max Rotation Rate | 3680 rpm | p. 443 |
| Engine Power (DV11) | 333 ps | p. 75 |
| Accumulator Charge Pressure | 10 kg/cm2 | p. 354 |
| DX480LC | ||
| Main Relief Pressure (Normal) | 320 kg/cm2 | p. 78 |
| Main Relief Pressure (Pressure Up) | 350 kg/cm2 | p. 78 |
| Fuel Tank Capacity | 620 liters | p. 70 |
| Hydraulic Reservoir Capacity | 265 liters | p. 70 |
| Counterweight Weight, DX480LC | 8,500 kg | p. 140 |
| DX520LC | ||
| Counterweight Weight, DX520LC | 11,100 kg | p. 140 |
