Part of the Doosan Repair Manuals.
Wrenching on a Doosan DX480LCA or DX500LCA hydraulic excavator? This 758-page Doosan DX480LCA, DX500LCA shop manual PDF (OEM #950106-00411E) covers both machines from swing bearing to track assembly. You get complete electrical schematics for the starting, charging, and monitoring circuits, full hydraulic schematics, and a dedicated troubleshooting, testing, and adjustment section covering pilot pressure and pump regulator setup. Teardown and reassembly procedures walk through the main pump, main control valve, swing device, travel motor, center joint, and every cylinder on the boom, arm, and bucket. Set the dash-size 8 ORFS swivel nuts at 5.1 to 5.7 kg-m, and confirm the 10 micron return line filter before you fire it back up. A dead travel motor doesn't care about your schedule. Bookmarked with a full text layer; search any spec, pull it up on your phone, and get back to digging.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 5-48 | Track Excavator Safety |
| Specifications | 49-82 | Specification for DX480LCA / DX500LCA |
| Upper Structure | 83-178 | Cabin, Counterweight, Fuel Tank, Fuel Transfer Pump, Swing Bearing |
| Lower Structure and Chassis | 179-212 | Track Assembly |
| Engine and Drive Train | 213-222 | Drive Coupling |
| Hydraulic System Troubleshooting, Testing and Adjustment | 223-304 | Troubleshooting, Pilot Pressure, Power Mode Valve, Pressure Up Valve, Pump Regulator |
| Accumulator | 305-312 | Gas-Charged Storage, Precharge Pressure, Diaphragm, Valve Assembly |
| Center Joint (Swivel) | 313-332 | Hydraulic Oil Flow, Disassembly, Inspection, Reassembly, Slipper Seals |
| Cylinders | 333-346 | Arm Cylinder, Boom Cylinder, Bucket Cylinder, Disassembly, Reassembly |
| Swing Device | 347-402 | Hydraulic Motor, Reduction Gear, Brake Part, Disassembly, Reassembly |
| Travel Device | 403-460 | Travel Motor, Reduction Gear, Brake Valve, Disassembly, Reassembly |
| Main Control Valve | 461-518 | Main Spool, Anti Drift Valve, Relief Valve, Load Check Valve, Reassembly |
| Remote Control Valve (Work Lever / Joystick) and Breaker EPPR Valve | 519-604 | Joystick, Pressure Reducing Valve, Breaker EPPR Valve, Solenoid Valve, Troubleshooting |
| Electrical System | 605-728 | Electrical Supply System, Engine Starting Circuit, Charging System, Monitoring System, Engine Control System, Air Conditioner System |
| Attachments | 729-758 | Boom and Arm, Bucket |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Orfs Swivel Nut Recommended Torque (Dash Size 4) | 2.4 - 2.6 kg•m | p. 114 |
| Orfs Swivel Nut Recommended Torque (Dash Size 6) | 3.3 - 3.9 kg•m | p. 114 |
| Weight of Counterweight | 8,500 kg (18,740 lb) | p. 140 |
| Weight of Counterweight (Optional) | 9,000 kg (19,840 lb) | p. 140 |
| Hydraulic reservoir return line filter rating | 10 micron | p. 233 |
| Pilot circuit filter rating | 10 micron | p. 233 |
| Main Relief Pressure (Normal) | 320 kg/cm2 | p. 76 |
| Main Relief Pressure (Pressure Up) | 350 kg/cm2 | p. 76 |
| Fuel Tank Capacity | 620 liters | p. 68 |
| Hydraulic Reservoir Capacity | 265 liters | p. 68 |
| Engine Power (DIN 6270) | 323 ps | p. 73 |
| Max Torque | 139 kg•m | p. 73 |
