Part of the Doosan Repair Manuals.
Hunting for a Doosan DX140LC shop manual PDF that also covers its bigger siblings? This 776-page factory shop manual (OEM #K1034080E) handles the DX140LC, 180LC, 225LC, 225NLC, 255LC, 300LC, and 340LC track excavators in one download. Inside you get full hydraulic schematics, complete electrical schematics for chasing sensor and relay faults, and a hydraulic troubleshooting section with testing and adjustment procedures for the main pump, swing motor, and travel motors. Torque tables run from 0.15 to 103.00 kg•m on metric fasteners, plus U.S. and phosphate-coated hardware charts. Set the boom overload relief valve at 360 kg/cm2 (5,112 psi), and fit 10 micron filters on both the return line and pilot circuit. Cylinder drift on your boom at 2 a.m. is no time for forum guesses. Bookmarked with a live text layer; search any spec and get wrenching.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 5-52 | Track Excavator Safety |
| Specifications | 53-78 | Specification for DX140LC |
| General Maintenance | 79-116 | General Maintenance Procedures, Standard Torques |
| Upper Structure | 117-214 | Cabin, Counterweight, Fuel Tank, Fuel Transfer Pump, Swing Bearing, Swing Reduction Gear |
| Lower Structure and Chassis | 215-246 | Track Assembly |
| Engine and Drive Train | 247-260 | Drive Coupling (Main Pump) |
| Hydraulic System Troubleshooting, Testing and Adjustment | 263-298 | Main Pump Assembly, Hydraulic Control Valve, Swing Motor, Travel Motor, Boom Cylinder, Arm Cylinder, Bucket Cylinder |
| Accumulator | 299-346 | Center Joint (Swivel), Cylinders |
| Swing Motor | 347-382 | Anticavitation Check Valve, Relief Valve, Swing Reactionless Valve, Brake Part, Driveshaft, Cylinder Block |
| Travel Moter | 383-454 | Reduction Gear, Hydraulic Motor, Brake Valve, Parking Brake, Swash Plate, Cylinder Block |
| Main Pump | 455-492 | Gear Pilot Pump, Relief Valve, Pump Regulator, Swash Plate, Rotary Group, Valve Block |
| Main Control Valve | 493-542 | Anti-Drift Valve, Relief Valve, Load Check Valve, Neutral Cut Spool, Check Valve |
| Remote Control Valve (Work Lever / Joystick) | 543-590 | Travel Control Valve (with Damper) |
| Solenoid Valve Assembly | 591-623 | Breaker EPPR Valve (Opt), Hydraulic Schematic (DX140LC) |
| Electrical System | 624-752 | Electrical Schematic (DX140LC) |
| Attachments | 753-776 | Boom and Arm, Bucket |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Max. Torque | 44.5 kg•m @ 1,400 rpm | p. 69 |
| Standard Metric Fasteners Torque | 0.15 kg•m to 103.00 kg•m | p. 106 |
| Hydraulic reservoir return line filter rating | 10 micron | p. 270 |
| Pilot circuit filter rating | 10 micron | p. 270 |
| Boom operating circuit overload relief valve pressure | 360 kg/cm2 (5,112 psi) | p. 271 |
| Boom up secondary pilot pressure | 7 - 9 kg/cm2 (100 - 130 psi) | p. 271 |
| Clearance between spindle and thrust plate | 0.5 mm (0.020") | p. 315 |
| Clearance between spindle and body | 0.1 mm (0.0039") | p. 315 |
| Engine control dial output voltage (1st step) | 4.0V | p. 72 |
| Engine control dial output voltage (7th step) | 2.5V | p. 290 |
| Rated voltage | 24V | p. 717 |
| Rated current | 20A | p. 717 |
