Part of the Doosan Repair Manuals.
Hunting for a Doosan DX180LC shop manual PDF? You just found it: 808 pages of factory shop manual (OEM #950106-00303) serving five Doosan track excavators, the DX180LC, DX225LC, DX225NLC, DX235NLC, and DX255LC, in one download. Inside: full electrical schematics, hydraulic schematics, and a complete hydraulic troubleshooting section for main relief pressure, actuator speeds, and pilot pressure. You get step-by-step teardown and reassembly for the swing motor, TM40VD travel motor, main control valve, gear pump, and cylinders, plus standard torque tables and track assembly service. Set the main relief to 330 kg/cm2 (350 in pressure-up mode) and fill the hydraulic reservoir with 140 liters before testing. Your excavator is down; forum guesses won't lift it. Bookmarked with a full text layer, so you can search any spec, jump straight to the section, and start wrenching.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 7-54 | Track Excavator Safety |
| Specifications | 55-84 | Specification for DX235NLC |
| General Maintenance | 85-122 | Standard Torques |
| Upper Structure | 123-226 | Cabin, Counterweight, Fuel Tank, Fuel Transfer Pump, Swing Bearing, Swing Reduction Gear |
| Lower Structure and Chassis | 227-262 | Track Assembly |
| Engine and Drive Train | 263-274 | Drive Coupling |
| Hydraulic System Troubleshooting, Testing and Adjustment | 275-312 | Main Relief Pressure, Actuator Speeds, Pilot Pressure, Swing System Troubleshooting, Control Valve Troubleshooting |
| Accumulator | 313-320 | Accumulator Operation, Precharge Pressure, Specifications |
| Center Joint (Swivel) | 321-334 | Center Joint Inspection, Disassembly, Reassembly, Seal Replacement |
| Cylinders | 335-364 | Cylinder Theory of Operation, Disassembly, Reassembly, Piston Nut, Slipper Seal Jig |
| Swing Motor | 365-396 | Swing Motor Structure, Operational Principles, Disassembly, Reassembly, Maintenance Standards |
| Travel Motor | 397-456 | TM40VD Operation, Disassembly, Reassembly, Testing, Lubricating Oil |
| Gear Pump | 457-468 | Single Gear Pump Disassembly, Reassembly, Tightening Torque |
| Main Control Valve | 469-653 | Main Control Valve Operation, Disassembly, Reassembly, Relief Valve Maintenance, Antidrift Valve |
| Electrical System | 654-784 | Electrica System, Electrical Schematic |
| Attachments | 785-808 | Boom and Arm, Bucket |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Main Relief Pressure (Normal) | 330 kg/cm2 | p. 77 |
| Main Relief Pressure (Pressure Up) | 350 kg/cm2 | p. 77 |
| Fuel Tank Capacity | 340 liters | p. 72 |
| Hydraulic Reservoir Capacity | 140 liters | p. 72 |
| Engine Power | 158 ps | p. 74 |
| Max Torque | 68 kg•m | p. 74 |
| Swing Reduction Gear Oil Capacity | 3.8 liters | p. 222 |
| R134a Gas Weight | 800 grams | p. 760 |
