Part of the Doosan Repair Manuals.
Need factory-level repair data for your Doosan DX235LCR hydraulic excavator? This 784-page Doosan DX235LCR shop manual PDF (OEM #950106-00081E) covers the whole machine, from swing bearing to travel motor. Inside: the factory hydraulic schematic, full electrical schematics spanning the starting, charging, and preheating circuits, plus step-by-step teardown and reassembly procedures for the main pump, main control valve, swing device, and cylinders. You also get pump regulator adjustment, pilot pressure testing, and a hydraulic troubleshooting section built for real diagnosis, not guesswork. The fuel tank holds 320 liters. Set your 1/2-inch split flange bolts at 15 to 18 ft lb and pull the 1-inch flanges to 27 to 35. No more chasing electrical gremlins with a test light and a hunch. Bookmarked with a live text layer; open it on your tablet, find the spec, and get the excavator digging again.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 7-54 | Track Excavator Safety |
| Specifications | 55-82 | Specification for DX235LCR |
| General Maintenance | 83-120 | Standard Torques |
| Upper Structure | 121-176 | Cabin, Counterweight, Fuel Tank, Fuel Transfer Pump, Swing Bearing |
| Lower Structure and Chassis | 177-212 | Track Assembly, Track Tension, Wear Limits and Tolerances, Track Shoe, Lower Roller, Upper Roller, Front Idler, Track Removal and Installation, Parts List |
| Engine and Drive Train | 213-226 | Drive Coupling |
| Hydraulic System Troubleshooting, Testing and Adjustment | 227-262 | Hydraulic Schematic, Operation of Working Components, Pilot Pressure, Power Mode Valve, Pressure Up Valve, Pump Regulator Adjustment |
| Accumulator | 263-270 | Accumulator General Description, Precharge Pressure, Specifications |
| Center Joint (Swivel) | 271-284 | Center Joint Inspection, Testing, Disassembly, Reassembly |
| Cylinders | 285-316 | Cylinder Theory of Operation, Disassembly, Reassembly, Special Tools, Piston Nut, Slipper Seal Jig |
| Swing Device | 317-368 | Swing Device Specifications, Motor Section Construction, Reduction Gear Section, Brake Part, Maintenance Standards |
| Travel Motor | 369-426 | TM40VD Operation Manual, Travel Motor Disassembly, Reassembly, Testing, List of Seals |
| Main Pump and PTO | 427-476 | General Repair Guidelines, Disassembly, Assembly, Tightening Torques, Gear Pump Sealing |
| Gear Pump and Main Control Valve | 477-638 | Single Gear Pump, Main Control Valve Disassembly, Main Relief Valve, Overload Relief Valve, Antidrift Valve |
| Electrical System | 639-762 | Electrical Supply System, Engine Starting Circuit, Engine Preheating System, Charging System, Monitoring System, Air Conditioner System |
| Attachments | 763-784 | Boom and Arm, Bucket |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Split Flange 1/2" Bolt Torque | 15 - 18 ft lb | p. 115 |
| Split Flange 3/4" Bolt Torque | 22 - 27 ft lb | p. 115 |
| "T" Bolt Hose Clamp Torque (Radiator, Air Cleaner, Boots, Etc.) | 59 - 63 in lb | p. 114 |
| Worm Drive Under 44 mm Hose Clamp Torque (Radiator, Air Cleaner, Boots, Etc.) | 20 - 30 in lb | p. 114 |
| Fuel tank capacity | 320 liters (84.5 U.S. gal) | p. 151 |
| Main relief pressure (standard, cylinder stall) | at least 350 bar (5,075 psi), under 355 bar (5,149 psi) | p. 246 |
| Main relief pressure (high stage, "Pressure Up") | 370 bar (5,263 psi) +10 bar (145 psi) | p. 246 |
| Pilot pressure at the pump outlet | 40 ± 5 bar (580 ± 73 psi) | p. 244 |
| Split flange 1" bolt torque | 3.7 - 4.8 kg•m (27 - 35 ft lb) | p. 115 |
| Bolt torque for fuel filter plug | 27 kg•m (200 ft lb) | p. 157 |
| Hydraulic reservoir return line and pilot circuit filter rating | 10 micron | p. 236 |
| Reservoir intake strainer rating | 80 mesh, 177 micron | p. 236 |
| Boom operating circuit overload relief valve setting | 380 kg/cm2 (5,405 psi) | p. 237 |
| Boom up secondary pilot pressure | 7 - 9 kg/cm2 (100 - 130 psi) | p. 237 |
| Hydraulic system operating temperature | 50°C (122°F) | p. 236 |
