Part of the Doosan Repair Manuals.
Wrench on a Doosan DX225LCA track excavator? This Doosan DX225LCA service manual PDF (OEM #K1049156E) packs 792 pages of factory shop manual procedures into one download. You get the complete electrical schematic with wiring diagrams, hydraulic schematics for the DX225LC/DX225LCA circuit, and a dedicated hydraulic troubleshooting, testing and adjustment section. Rebuild procedures cover the swing bearing, swing motor, travel motor, main control valve, axial piston pump, track assembly, and the boom, arm, and bucket. Standard torque tables and a full specifications chapter back every job. Set the overload relief valves to 360 kg/cm2 (5,112 psi), and torque the sprocket fitting bolts to 25.7 kg-m before you send it back to the pit. No more chasing pilot-pressure faults with a gauge and a guess. Bookmarked, keyword-searchable, and readable on any device: download it and walk it straight to the machine.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 7-52 | Track Excavator Safety |
| Specifications | 53-80 | Specification for DX225LCA |
| General Maintenance | 81-118 | General Maintenance Procedures, Standard Torques |
| Upper Structure | 119-224 | Cabin, Counterweight, Fuel Tank, Fuel Transfer Pump, Swing Bearing, Swing Reduction Gear |
| Lower Structure and Chassis | 225-260 | Track Assembly |
| Engine and Drive Train | 261-274 | Drive Coupling (Main Pump) |
| Hydraulic System Troubleshooting, Testing and Adjustment | 277-310 | Hydraulic System - General Notes, Hydraulic Schematic, General Notes, Operation of Working Components, Boom Operating Circuit, Boom Up Circuit, Boom Down Circuit, Arm Operating Circuit, Arm Crowd Circuit |
| Accumulator | 311-320 | General Description, Specifications, Precharge Pressure, Accumulator Charging with Nitrogen, Bleeding Residual Pilot Pressure |
| Center Joint (Swivel) | 321-334 | Parts List, Troubleshooting, Testing and Adjustment, Inspection, Testing, Disassembly, Reassembly |
| Cylinders | 335-366 | Theory of Operation, Parts List, Special Tools and Materials, Piston Nut, Piston Jig, Steel Bushing Jig, Dust Wiper Jig, Slipper Seal Jig, Slipper Seal Straightening Jig |
| Swing Motor | 367-402 | Operation Manual, Information on Marking, Specifications, Structure and Operational Principles, Cautions, Maintenance Instructions, Disassembly and Assembly, Maintenance |
| Travel Motor | 403-460 | TM40VD Operation Manual, General Specifications, Legend, Basic Structure and Diagram, Operation Principles, Cautions in Use, External Specifications Diagrams, Basic Structure and Diagrams, TM40VD Maintenance Instructions |
| Gear Pump | 461-472 | Single Gear Pump, Disassembly, Reassembly |
| Main Control Valve | 473-540 | Theory of Operation, Parts List, Specifications, Troubleshooting, Testing and Adjustment, Adjustment of Valves, Disassembly, Tolerances), Cleaning |
| Axial Piston Pump | 541-560 | Pump Maintenance, Component Locations, Parts List, Tools, Tightening Torque, Disassembly, Reassembly, Pump Body Maintenance Standards, Change Standards of Worn Parts |
| PTO Server | 561-572 | Pump Maintenance, Disassembly, Reassembly, Maintenance Standards of Pump Body |
| Remote Control Valve (Work Lever / Joystick) | 573-594 | Theory of Operation, Parts List, Specifications, Torques, Tools and Materials, Disassembly, Tolerances), Reassembly, Start-Up Procedures |
| Travel Control Valve (with Damper) | 595-620 | Theory of Operation, Pressure Reducing Valve, Operating Theory of Damper Mechanism, Causes of Faults and Measures, Parts List, Specification, Torques, Removal, Disassembly |
| Solenoid Valve Assembly | 621-636 | Parts List, Functions of 5-Solenoid Valve Assembly Package, Assembly Diagram and Tools Required, Cautions During Disassembly and Reassembly, Solenoid Valve Diagram, Check Points and Solutions for Problems, Assembly Diagram and Tools Reguired, Troubleshooting Guide |
| Breaker EPPR Valve (Opt) | 637-648 | Structure, Numbers and Names of Parts, Functions and Operation, Cautions for Operation, Maintenance Instructions, Maintenance, Disassembly, Assembly |
| Hydraulic Schematic (DX225LC/DX225LCA) | 649-655 | Full Hydraulic Circuit Diagram, Component Legend, Pump and Main Control Valve Routing, Circuit Coverage for DX225LC/DX225LCA |
| Electrical System | 656-766 | Electrical Schematic (DX225LCA) |
| Attachments | 767-792 | Boom and Arm, Bucket |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Standard 600 mm (24") shoe ground pressure | 0.45 kg/cm2 (6.4 psi) | p. 67 |
| Optional 700 mm (28") shoe ground pressure | 0.39 kg/cm2 (5.55 psi) | p. 67 |
| Overload relief valves | 360 kg/cm2 (5,112 psi) | p. 285 |
| Boom control valve spools secondary pilot pressure | 7 - 9 kg/cm2 (100 - 130 psi) | p. 285 |
| Sprocket Fitting Bolt Tightening Torque | 25.7 ± 4.0 kg•m | p. 418 |
| Coolant Temperature Sensor Resistance | 128 ohms | p. 683 |
| Filter cleaning interval | 500 hours | p. 733 |
| Main Relief Pressure (Normal) | 330 kg/cm2 | p. 73 |
| Main Relief Pressure (Pressure Up) | 350 kg/cm2 | p. 73 |
| Fuel Tank Capacity | 400 liters | p. 67 |
| Hydraulic System Capacity | 240 liters | p. 67 |
| Hydraulic Reservoir Capacity | 140 liters | p. 67 |
