Part of the Doosan Repair Manuals.
Looking for the Doosan DX225LC-3 service manual PDF straight from the factory? This 874-page shop manual (OEM #950106-00364E) covers the whole DX-3 crawler excavator line: DX140LC-3, DX180LC-3, DX225LC-3, DX255LC-3, and DX300LC-3. Inside you get full hydraulic schematics plus troubleshooting, testing, and adjustment procedures for the main pump, swing device, travel device, and main control valve. Complete electrical schematics trace the starting circuit, charging system, and engine control system wire by wire, and page after page of standard torque tables backs up every job from the swing bearing to the track assembly. Torque your 3/4-inch split flange bolts to 3.0 to 3.7 kg-m (22 to 27 ft lb), then fill the hydraulic system to 240 liters. Your excavator is down and burning money. Grab the download, search any spec by keyword, and get wrenching.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 5-72 | Track Excavator Maintenance Safety |
| Specifications | 73-102 | Specifications for DX225LC-3 |
| General Maintenance | 103-140 | Standard Torques |
| Upper Structure | 141-202 | Cabin, Counterweight, Fuel Tank, Fuel Transfer Pump, Swing Bearing |
| Lower Structure and Chassis | 203-236 | Track Assembly |
| Engine and Drivetrain | 237-266 | Engine Coolant Heater, Drive Coupling |
| Hydraulic Troubleshooting, Accumulator and Center Joint | 267-325 | Hydraulic System Troubleshooting, Testing and Adjustment, Accumulator, Center Joint (Swivel) |
| Cylinders, Swing Device and Travel Device | 326-473 | Cylinders, Swing Device, Travel Device, Safety Instructions, General Description, Theory of Operation, Special Tools and Materials |
| Main Pump, PTO Server and Gear Pump | 474-517 | Main Pump, PTO Server, Gear Pump, Safety Instructions, Pump Maintenance, Component Locations, Tools |
| Control Valves and Solenoids | 518-661 | Main Control Valve, Remote Control Valve (Work Lever / Joystick), Travel Control Valve (with Damper), Solenoid Valve Assembly, Breaker EPPR Valve (Option), Safety Instructions, General Description, Theory of Operation, Troubleshooting, Testing and Adjustment |
| Dozer Valve and Hydraulic Schematic | 662-682 | Dozer Valve, Hydraulic Schematic (DX225LC-3), Safety Instructions, Structure Diagram, Performance Specification, Hydraulic Pressure Circuit Diagram |
| Electrical System | 683-848 | Electrical Supply System, Engine Starting Circuit, Charging System, Monitoring System, Engine Control System, Air Conditioner System |
| Attachments | 849-874 | Boom and Arm, Bucket |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Split Flange 1/2" Bolt Torque | 2.1 - 2.5 kg•m (15 - 18 ft lb) | p. 135 |
| Split Flange 3/4" Bolt Torque | 3.0 - 3.7 kg•m (22 - 27 ft lb) | p. 135 |
| Replacement Period | 1,000 hr | p. 719 |
| Fuel Tank Capacity | 400 liters | p. 90 |
| Hydraulic System Capacity | 240 liters | p. 90 |
| Hydraulic Reservoir Capacity | 200 liters | p. 90 |
| Main Relief Pressure (Normal) | 330 kg/cm2 | p. 96 |
| Main Relief Pressure (Pressure Up) | 350 kg/cm2 | p. 96 |
| Travel Control Valve Pressure/Stroke | 25 kg/cm2 @ 4.3 mm | p. 620 |
| Travel Device Gear Oil Quantity | 3.3 liters | p. 432 |
| Breaker EPPR Valve Bolt Torque (M35) | 450 ± 50 kg•cm | p. 656 |
| Main Control Valve Relief Valve Torque | 7.95 - 8.97 kg•m | p. 577 |
