Got a track excavator down in the yard? This 688-page Daewoo Solar 225LL shop manual PDF (OEM #023-00078E) puts the factory's own service data on your bench. You get full electrical schematics for chasing wiring faults, hydraulic schematics with complete circuit routing, and a dedicated section on hydraulic troubleshooting, testing, and adjustment covering pilot pressure, the power mode valve, and swing priority. Teardown and reassembly procedures run from the swing motor and TM40VC travel motors through the main pump, regulator, and main control valve, backed by standard torque tables. Set the main relief between 330 and 335 bar (4,785 to 4,858 psi), then confirm the 135-liter hydraulic tank is topped off. Your excavator earns nothing sitting still. Download once, search any spec by keyword, and take the bookmarked PDF straight to the machine.
What's Inside This Daewoo Solar 225LL, Solar 300LL Manual
| System | Pages | Key Topics |
|---|---|---|
| Publication Request for Proposed Revision | 7-8 | - |
| Safety | 9-46 | Track Excavator Safety S0102015K |
| Specifications | 47-66 | Specifications for Solar 225LL S0202150K |
| General Maintenance | 67-94 | General Maintenance Procedures S0302000, Standard Torques S0309000 |
| Upper Structure | 95-154 | Cab S0402040K, Counterweight S0403000, Fuel Tank \S0405050, Swing Bearing S0407000, Swing Reduction Gearbox S0408015K |
| Lower Structure and Chassis | 155-182 | Track Assembly S0505045K |
| Engine and Drive Train | 183-224 | Air Conditioner S0605060K, Drive Coupling (Main Pump) S0609000 |
| Hydraulic System Troubleshooting, Testing and Adjustment | 225-254 | Hydraulic System General Notes, Operation of Working Components, Pilot Pressure, Power Mode Valve, Swing Priority Valve, Pressure Up Valve |
| Accumulator | 255-260 | Accumulator General Description, Specifications, Charge Pressure, Volume |
| Center Joint (Swivel) | 261-270 | Center Joint General Description, Parts List, Troubleshooting, Testing, Disassembly, Reassembly |
| Cylinders | 271-310 | Cylinder General Description, Theory of Operation, Parts List, Special Tools, Disassembly, Assembly |
| Swing Motor | 311-340 | Swing Motor General Description, Theory of Operation, Swing Brake Operation, Parts List, Disassembly, Reassembly |
| Travel Motor (with Gearbox) (TM40VC) | 341-394 | Travel Motor Theory of Operation, Brake Valve, Parking Brake, Reduction Gearbox Operation, Parts List, Disassembly, Reassembly |
| Grapple Rotate Motor | 395-432 | Torqmotor Features, Parts List, Troubleshooting, Disassembly, Reassembly, Start-Up Procedures |
| Main Pump (with Regulator) and Main Control Valve | 433-592 | Main Pump Regulator Description, Pump Output Control, Main Control Valve Operation, Swing Priority Circuit, Arm Regeneration, Boom Regeneration |
| Electrical System | 593-678 | Electrical System S0802220K, Electrical Schematic (S225LL) S0892025K |
| Attachments | 679-688 | Boom and Stick S0902020 |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Standard relief pressure | 330 bar to 335 bar (4,785 psi to 4,858 psi) | p. 243 |
| High-pressure adjustment per 1/4 turn | 45 kg/cm2 (640 psi) | p. 518 |
| Engine Rated Output | 150 ps @ 2,000 rpm | p. 57 |
| Fuel Tank Capacity | 310 liters | p. 57 |
| Hydraulic Oil Tank Capacity | 135 liters | p. 57 |
| Swing Speed | 12.9 rpm | p. 57 |
| Travel Speed (High) | 5.4 km/h | p. 57 |
| Travel Speed (Low) | 3.0 km/h | p. 57 |
| Swing Reduction Gearbox Oil Capacity | 6 liters | p. 153 |
| Cab Weight | 290 kg | p. 101 |
| Counterweight Weight | 5,300 kg | p. 107 |
| Travel Reduction Gear Oil Capacity | 5.40 liters | p. 393 |
Daewoo Solar 225LL, Solar 300LL Common Problems This Manual Covers
Daewoo Solar 225LL bucket and boom slow, weak digging power, main relief pressure reads low
Install a pressure gauge on the main pump test port and run the engine at full throttle with a cylinder stalled against relief. Turn the innermost small-diameter adjustment screw clockwise to raise the setting, following the procedure on page 243. Set standard relief pressure between 330 and 335 bar (4,785 to 4,858 psi).
Manual Section: Hydraulic System Troubleshooting, Testing and Adjustment p. 243Swing motor fails to operate or upper structure swings at reduced rpm under load
Check pilot pressure to the swing brake release port first; a stuck parking brake mimics motor failure. Inspect the swing reduction gearbox oil for metal flakes, then refill with 6 liters on the Solar 225LL. Follow the disassembly and inspection procedure starting on page 311 if the motor shows internal leakage.
Manual Section: Swing Motor p. 311Machine pulls to one side, travel motors sluggish, one track won't move on grade
Perform a jack-up test to isolate the slow side, then swap travel pilot lines to confirm whether the fault follows the motor or the control valve. Drain the travel reduction gearbox, check the old oil for metal particles, and refill with 5.40 liters on the Solar 225LL, using the procedures starting on page 341.
Manual Section: Travel Motor (with Gearbox) (TM40VC) p. 341Main pump whines or vibrates excessively at full throttle, engine bogs down under hydraulic load
Verify pump case drain flow and inspect the drive coupling for wear before condemning the pump. Bleed air from the suction line; aeration is the most common cause of pump whine. If regulator pressure adjustment is needed, each 1/4 turn of the adjusting screw changes the setting by 45 kg/cm2 (640 psi), as shown on page 518.
Manual Section: Main Pump (with Regulator) and Main Control Valve p. 433Hydraulic oil temperature runs high, all functions slow down after machine warms up
Check hydraulic oil level with the machine on flat ground; the Solar 225LL tank holds 135 liters, and a low level aerates the oil and builds heat fast. Clean the oil cooler fins with compressed air, then test relief settings using the procedures starting on page 225, since a relief valve stuck partially open dumps constant heat into the system.
Manual Section: Hydraulic System Troubleshooting, Testing and Adjustment p. 225Frequently Asked Questions
How do I reset the engine hour meter on the Daewoo Solar 225LL?
To reset the operating hours for filters and oils, access the 'Filter/Oil Information' mode on the instrument panel. After changing the filter and oil, you can reset the operating hour, which allows the system to track the time until the next service interval. p. 623
What is the tightening torque for the main relief valve on the Daewoo Solar 225LL?
The tightening torque for the main relief valve on the main control valve is 10 kg•m (72 ft lb). p. 517
What is the recommended precharge pressure for the accumulator on the Solar 225LL?
The precharge pressure (P1) varies by system and model. For the Solar 225LL, the pilot/travel system accumulator has a charge pressure of 10 kg/cm² (142 psi) and a volume of 750 cc (45.77 in³). p. 259
What is the procedure for adjusting the high idle speed on the Solar 225LL?
To adjust the high idle speed, turn the starter switch to the 'ON' position and select Power Mode. Turn the engine speed control dial to 'HIGH IDLE' to reduce the motor cable to its shortest length, then adjust the motor cable linked with the bracket so the engine governor lever touches the maximum position of the stopper. p. 661
What is the oil capacity for the swing reduction gearbox on the Solar 225LL?
The swing reduction gearbox requires 6 liters (6.3 quarts) of gear oil. p. 153
What do I get after purchasing this Daewoo Solar 225LL manual?
You get a 688-page searchable PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Am I able to print pages from this Daewoo Solar 225LL manual?
Yes, print as many copies as you want, and there are no restrictions. Many mechanics print the section they need and bring it to the shop floor.
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