Part of the Doosan Repair Manuals.
Looking for a Doosan DX300LL shop manual PDF with real factory data? This 806-page shop manual (OEM #K1011789E) walks you through the DX300LL track excavator from the swing bearing down to the track links. Inside: full hydraulic schematics, electrical schematics for chasing wiring faults, a dedicated hydraulic troubleshooting and testing section, and page after page of teardown procedures for the main control valve, swing motor, travel motor, and axial piston pump. You also get standard torque tables plus rebuild steps for cylinders, the center joint, and the boom and stick. Fill the fuel tank to 500 liters and check track link pitch at 203.2 mm before you send it back to work. No more chasing hydraulic pressure faults with guesswork. Bookmarked with a full text layer; jump straight to a section or search any spec from the phone in your shop.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 5-50 | |
| Specifications | 51-76 | Specification for DX300LL |
| General Maintenance | 77-114 | General Maintenance Procedures, Standard Torques |
| Upper Structure | 115-220 | Cabin, Counterweight, Fuel Tank, Fuel Transfer Pump, Swing Bearing, Swing Reduction Gear |
| Lower Structure and Chassis | 221-250 | Track Assembly |
| Engine and Drive Train | 251-260 | Drive Coupling (Main Pump) |
| Hydraulic System Troubleshooting, Testing and Adjustment | 263-300 | Safety Precautions, Applicable Models, Hydraulic System - General Notes, Hydraulic Schematic, Operation of Working Components, Boom Operating Circuit |
| Accumulator | 301-348 | Safety Precautions, Applicable Models, General Description |
| Swing Motor | 349-388 | Safety Precautions, Applicable Models, General Description, Theory of Operation, Makeup Check Valve, Operation of Time Delay Valve |
| Travel Motor SP000253 | 389-448 | Safety Precautions, Applicable Models, General Description, Theory of Operation, Special Tools and Materials, Hydraulic Motor Part |
| Main Control Valve | 449-514 | Safety Precautions, Applicable Models, General Description, Theory of Operation, Troubleshooting, Testing and Adjustment |
| Axial Piston Pump | 515-558 | Safety Precautions, Applicable Models, General Description, Model Number Designation, Theory of Operation |
| Remote Control Valve (Work Lever / Joystick) | 559-606 | Safety Precautions, Applicable Models, General Description, Theory of Operation, Torques, Tools and Materials |
| Solenoid Valve Assembly | 607-630 | Safety Precautions, Applicable Models, Package, Functions of Solenoid Valve Assembly Package, Assembly Diagram and Tools Required, Solenoid Valve Diagram |
| Electrical System | 631-768 | Air Conditioner SP000025, Electrical Schematic (DX300LL) |
| Attachments | 769-806 | Boom and Stick, Boom and Arm (Exca. Front Option), Bucket (Exca. Front Option) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Worm Drive - Under 44 mm (1-3/4 in) Open Diameter | 0.2 - 0.3 kg•m (20 - 30 in lb) | p. 108 |
| Worm Drive - Over 44 mm (1-3/4 in) Open Diameter | 0.5 - 0.6 kg•m (40 - 50 in lb) | p. 108 |
| Fuel tank capacity | 500 liters (132 U.S. gal) | p. 145 |
| Link Pitch | 203.2 mm | p. 233 |
| Bushing Outside Diameter | 66.5 mm | p. 233 |
| Interference between bushing and link | 0.35 - 0.464 mm | p. 233 |
| Interference between regular pin and link | 0.273 - 0.485 mm | p. 233 |
| Main relief high-stage pressure | 350 bar (5075 psi) | p. 283 |
| Low-stage main relief pressure | 330 bar to 335 bar (4,785 psi to 4,858 psi) | p. 283 |
| Clearance between the spindle and thrust plate | 0.5 mm | p. 317 |
| Clearance between the spindle and body of the center swivel | 0.1 mm | p. 317 |
| Coil resistance | 26.7Ω @ 20°C | p. 618 |
