This is the factory Daewoo Solar 225NLC-V shop manual (OEM #023-00062E), 684 pages built around one machine: the Specifications section is printed for the 225NLC-V, and the hydraulic and electrical schematic chapters are drawn for the Solar 225LC-V and 225NLC-V pair. The full hydraulic schematic sits on pages 565 to 572 and the full electrical schematic on pages 651 to 658, alongside a complete troubleshooting, testing and adjustment section and step-by-step teardowns of the main pump with regulator, main control valve, swing motor, and the GM35VL travel motor. Set standard relief between 330 and 335 bar, hold pilot pressure at 40 ±5 bar at the gear pump outlet, and check the swing motor relief against 285 kg/cm2 before you condemn a component. The safety and general maintenance sections up front are shared across the Solar -V range. Bookmarked with a real text layer: search any spec, jump to any section, fix the machine.
What's Inside This Daewoo Solar 225NLC-V Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 7-46 | To the Operator of a Daewoo Excavator, General Safety Essentials, Location of Safety Labels, General Hazard Information, Before Starting Engine, Machine Operation, Battery, Towing, Lifting with Sling |
| Specifications | 47-70 | General Dimensions, Working Range, General Specifications, Engine Performance Curves (DIN 6270), Performance Tests, Travel Speed and Travel Motor Balance Tests, Swing Speed and Deceleration Force Test |
| General Maintenance | 71-98 | General Maintenance Procedures S0302000, Standard Torques S0309000 |
| Upper Structure | 99-164 | Cab S0402040K, Counterweight S0403050K, Fuel Tank S0405006K, Fuel Transfer Pump S0405500, Swing Bearing S0407000, Swing Reduction Gearbox S0408015K |
| Lower Structure and Chassis | 165-192 | Track Assembly S0505030 |
| Engine and Drive Train | 193-234 | Air-Conditioner S0605060K, Drive Coupling (Main Pump) S0609000 |
| Hydraulic System Troubleshooting, Testing and Adjustment | 235-272 | Hydraulic Schematic, Operation of Working Components, Procedural Troubleshooting, Pilot Pressure, Power Mode Valve, Swing Priority Valve, Pressure Up Valve |
| Accumulator | 273-278 | General Description, Specifications, Charge Pressure, Volume |
| Center Joint (Swivel) | 279-288 | General Description, Parts List, Troubleshooting, Testing, Disassembly, Reassembly |
| Cylinders | 289-328 | General Description, Theory of Operation, Parts List, Special Tools, Disassembly, Assembly |
| Swing Motor | 329-358 | General Description, Theory of Operation, Swing Brake Operation, Parts List, Disassembly, Reassembly |
| Travel Motor (with Gearbox) (GM35VL) | 359-412 | General Description, Theory of Operation, Parking Brake, High and Low Speed Switching, Disassembly, Reassembly |
| Main Pump (with Regulator) | 413-452 | General Description, Pump Regulator Description, Horsepower Control, Power Shift Control, Disassembly, Reassembly |
| Main Control Valve | 453-520 | Control Valve Operation, Swing Priority Circuit, Arm Priority Circuit, Bucket Junction Circuit, Main Relief Valve, Overload Relief Valve |
| Pilot Control Valve (Work Lever / Joystick) | 521-540 | General Description, Theory of Operation, Structure and Function, Parts List, Specifications, Torques, Removal, Disassembly, Cleaning and Inspection (Wear Limits and Tolerances), Reassembly, Installation, Start-Up Procedures |
| Travel Control Valve (with Damper) | 541-564 | General Description, Theory of Operation, Pressure Reducing Valve, Operating Theory of Damper Mechanism, Parts List, Torque, Troubleshooting, Testing and Adjustment, Disassembly, Cleaning and Inspection, Installation, Start-Up Procedures |
| Hydraulic Schematic (Solar 225LC-V / 225NLC-V) | 565-572 | General Description, Solar 225LC-V Hydraulic Schematic, Solar 225NLC-V Hydraulic Schematic |
| Electrical System | 573-650 | Troubleshooting - Electrical System, Electric Supply System, Engine Starting Circuit, Engine Preheating System, Charging System, Monitoring System, Instrument Panel, Power Mode Control, Work Mode Control, Engine Control System, Automatic Deceleration (Auto Idle) Control, Power Boost Mode, Automatic Travel Speed Control, Self-Diagnostic Function, e-EPOS Controller, Wiper System |
| Electrical Schematic (Solar 225LC-V / 225NLC-V) | 651-658 | General Description, Solar 225LC-V Electrical Schematic, Solar 225NLC-V Electrical Schematic |
| Attachments | 659-682 | Boom and Arm S0902010, Bucket S0904000 |
| Publication Request for Proposed Revision | 683-684 | Company Name, Street Address, City, State, Country, Machine Model |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Engine model | DB58TIS (ATW) | p. 61 |
| Engine power | 150 ps @ 2,000 rpm (148 hp) | p. 61 |
| Engine max. torque | 60 kg•m @ 1,400 rpm (434 ft lb) | p. 61 |
| Fuel tank capacity | 320 liters (84.5 U.S. gal) | p. 58 |
| Hydraulic system capacity | 240 liters (63.4 U.S. gal) | p. 58 |
| Hydraulic reservoir capacity | 160 liters (42 U.S. gal) | p. 58 |
| Standard main relief pressure | 330 - 335 bar (4,785 - 4,858 psi) | p. 253 |
| Main relief high-stage pressure (pressure up) | 350 bar (5,075 psi) | p. 253 |
| Pilot pressure at gear pump outlet | 40 ±5 bar (580 ±73 psi) | p. 248 |
| Pilot pressure at joystick | 23.5 ±1.5 bar (341 ±22 psi) | p. 248 |
| Swing motor relief valve pressure | 285 kg/cm2 (4,052 psi) | p. 245 |
| Main pump total displacement (Solar 225NLC-V) | 106.0 cc (6.47 in3) x 2 pumps | p. 430 |
| Counterweight mounting bolt torque (Solar 225NLC-V) | 150 kg•m (1,085 ft lb) | p. 115 |
| Center joint wear limits (thrust plate / stem-to-body) | 0.5 mm (0.020") / 0.1 mm (0.0039") | p. 287 |
Daewoo Solar 225NLC-V Common Problems This Manual Covers
Daewoo Solar 225NLC-V hydraulic power weak on all functions, boom and bucket slow under load
Check the hydraulic reservoir first; it holds 160 liters and a low tank starves both pumps. Run the engine at rated 2050 rpm and gauge main relief pressure using the adjustment procedure on page 253. Set standard relief between 330 and 335 bar (4,785 to 4,858 psi). If pressure will not build, pull and clean the suction filter.
Manual Section: Hydraulic System Troubleshooting, Testing and Adjustment p. 235One function weak while the others work fine, arm curls slow under load
Test the weak circuit against a healthy one before condemning the pump. Swap the overload relief valve with one from a working circuit and retest; if the weakness follows the valve, replace it. When reinstalling the check-valve cap at the main relief valve (TS) port, torque it to 10 kg•m (72 ft lb) per page 515. Inspect the spool for scoring if both valves test good.
Manual Section: Main Control Valve p. 453Hydraulic pump whines and oil foams in the tank after a filter change
Check oil level in the 160 liter reservoir with the machine on level ground; a low tank pulls air straight into the suction line. Tighten the suction hose clamps and pump inlet fittings, then replace the O-ring under the suction filter cover. Run the engine at low idle for several minutes to purge trapped air before loading the machine.
Manual Section: Hydraulic System Troubleshooting, Testing and Adjustment p. 235Oil leaking from the center swivel joint and machine pulls to one side when traveling
Relieve tank pressure and strip the center joint following the disassembly steps starting on page 279. Replace every seal and O-ring on the stem. Measure stem-to-body clearance; page 287 says to replace or repair either part past 0.1 mm (0.0039") of measurable wear, and to replace any cover, stem or thrust plate showing more than 0.5 mm (0.020") of visible wear. Coat each new seal with clean hydraulic oil on reassembly.
Manual Section: Center Joint (Swivel) p. 279Hydraulic oil runs hot and drains out dark with a burnt smell
Drain the system and inspect the fluid for metal or varnish; the full circuit holds 240 liters, so budget oil before you start. Clean the cooler fins with low pressure air and flush the core if the outlet stays hot. Verify main relief is not set above the 330 to 335 bar standard; an over-set relief dumps constant heat into the oil.
Manual Section: Hydraulic System Troubleshooting, Testing and Adjustment p. 264Frequently Asked Questions
How do I reset the error codes on the Daewoo Solar 225NLC-V?
Correct the fault first, then reset. For the short-circuit codes (01 EPPR valve, 02 pressure-up solenoid, 03 swing priority solenoid) the manual says to turn the start switch from "OFF" to "ON" once the problem is corrected. The 82 communication error between the e-EPOS controller and the instrument panel resets automatically as soon as the fault clears. p. 611
What is the procedure for troubleshooting hydraulic pressure loss on a Daewoo Solar 225NLC-V?
Troubleshooting hydraulic pressure loss involves checking the main relief pressure, pilot pressure, and ensuring the hydraulic system is topped up. Refer to the 'Hydraulic System Troubleshooting, Testing and Adjustment' section starting on page 237 for detailed procedures. p. 268
How do I reset the operating hours for filters and oil on the Daewoo Solar 225NLC-V?
After changing the filter and oil, open the 'Filter/Oil Information' mode on the instrument panel. From there you can reset the operating hour, so the time remaining until the next service interval stays easy to check. p. 601
What is the torque specification for the counterweight mounting bolts on a Solar 225NLC-V?
The mounting bolts for the counterweight on a Solar 225NLC-V must be torqued to 150 kg•m (1,085 ft lb). p. 115
What is the fuel tank capacity for the Solar 225NLC-V?
The fuel tank capacity for the Solar 225NLC-V is 320 liters (85 U.S. gal). p. 121
What format is this Daewoo Solar 225NLC-V manual in?
This is a 684-page searchable PDF ready for immediate download. Works on any device, so pull it up on your phone while you're under the hood. No shipping, no waiting.
Is this Daewoo Solar 225NLC-V Shop Manual printable?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
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