This 344-page Daewoo 330-III Shop Manual PDF is the same factory book Daewoo techs used, covering the excavator from swing bearing to track spring. You get full teardown and reassembly procedures for the main pump, swing motor, travel motor final drive, and main control valve, plus rated lift capacity tables and performance test standards. A dedicated troubleshooting section walks your engine, electrical, and hydraulic problems back to root cause, backed by torque tables and wear limits for the D2366T engine. Check journal bearing crush at 0.15 to 0.25 mm, and replace grooved bearing housings once wear passes 0.05 mm. Rebuilding a 250-horsepower excavator on forum guesses is a bad bet. Bookmarked with a real text layer: type the spec, jump straight to the section, and get back on the machine.
What's Inside This Daewoo S330LC-3 (330-III) Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety and General Precautions | 1-22 | Safety Rules and Decals, Operating and Service Precautions, Machine Walk-Around, Fire and Fluid Safety, Lifting and Support |
| General Information and Specifications | 23-60 | Excavator Machinery Plan, Excavator Engine Specifications, Hydraulic System Component Specifications, General Dimensions, Working Range Dimensions |
| Upperstructure and Front Attachment Repair | 61-120 | Operator’s Cab Removal Procedure, Falling Object Protective Structures (F.O.P.S.), Front Attachment Pin Specifications, Bucket Tooth Inspection and Replacement |
| Hydraulic Cylinders and Accumulator | 121-144 | Operation of Hydraulic Cylinders, Attachment Cylinder Components, Cylinder Assembly and Disassembly, Cylinder Reassembly, Welding Precautions and Guidelines, Accumulator |
| Engine, Cooling, Counterweight and Swing Bearing | 145-171 | Engine Components and Accessories, Fuel Tank Removal and Installation, Engine Cooling System: Radiator/Oil Cooler, Counterweight Removal and Installation, Swing Bearing Maintenance |
| Center Joint, Main Pump and Hydraulic Circuit | 172-182 | Center Joint (Swivel) Overhaul/Repair, Hydraulic System General Notes, Hydraulic System Schematic, Operation of Working Components, Main Pump Assembly Description |
| Travel Motor and Reduction Gearbox | 183-232 | General Description, Travel Motor Assembly Parts List, Travel Motor Operation, Travel Brake, Travel Motor (Hi/Lo) Tilting Valve |
| Electrical System (24 Volt) | 233-268 | General Description, 24 Volt Operation, Engine Start-Up and Shutdown, Cylinder Preheat – Intake Air Electrical Heater, Alternator Circuit, Low Current Electrical Circuits |
| Engine Overhaul - Daewoo D2366T | 269-282 | Engine Specifications (D2366T), Wear Limits of Major Engine Components, Engine Oil Pump Overhaul and Rebuilding, Fuel Injection and Pump Installation, Alignment and Timing |
| Lubrication, Torque and Sealant Specifications | 283-308 | Table of Recommended Lubricants, Engine Speed Control Adjustment, Torque Specifications, Torque Wrench Extension Tools, Flange and Thread Sealant Assembly Compounds |
| Troubleshooting - Engine, Electrical and Hydraulic | 309-336 | Troubleshooting – Engine Problems, Troubleshooting – Electrical System, Pilot Pressure, Negacon, Negative Control, Power Mode Valve, Troubleshooting – Hydraulic Problems |
| Specifications Index and Quick Reference | 337-344 | Hydraulic System Component Specifications, Engine Specifications, Travel Motor and Reduction Gearbox, Swing Bearing Maintenance, Main Control Valve Disassembly |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Service Standards for Replacing Worn Parts | 4-28 | p. 210 |
| Roller bearing/needle bearing | Replace if damage is evident on rolling surface | p. 210 |
| Bearing housing and shaft (if grooved or galled) | 0.05 mm (0.0020") | p. 270 |
| Engine Displacement | 11,051 cm3 | p. 24 |
| Rated Flywheel Horsepower | 250 Metric hp | p. 24 |
| Torque Output | 100 kg m | p. 24 |
| Fuel Injection Pressure | 210 kg/cm2 | p. 24 |
| Engine Oil System Capacity | 25 l | p. 24 |
| Main Pump Relief Pressure | 300 – 320 kg/cm2 | p. 26 |
| Pilot Pump Relief Valve | 40 kg/cm2 | p. 26 |
| Accumulator Nitrogen Charge | 15 kg/cm2 | p. 26 |
| Operating Weight | 31,800 Kg | p. 28 |
Daewoo S330LC-3 (330-III) Common Problems This Manual Covers
Daewoo 330-III swing gearbox grinding noise, bearing rollers pitted and outer races cracked
Remove the gearbox cover and inspect bearing rollers, cages, and cups for pitting, scoring, or cracked races. Replace the cone and cup together as a matched assembly, never one piece alone. Check the shaft for grooving or galling; anything over 0.05 mm (0.0020 inch) means the shaft is done. Service standards for worn parts start on page 210.
Manual Section: Troubleshooting – Swing Gearbox p. 210Hydraulic cylinders slow and weak under load, boom and arm barely lift
Check hydraulic oil level first; the tank holds 360 l and running low pulls air into the pumps. Connect a flow meter and test main relief pressure against the 300 to 320 kg/cm2 spec on page 26. Verify pilot pressure at 40 kg/cm2. If pressures test good, follow the troubleshooting procedures starting on page 310.
Manual Section: Troubleshooting – Hydraulic Problems (General)Engine cranks slowly and will not fire on cold mornings, batteries seem weak
Test battery voltage under load first; this is a 24 volt system and tired batteries drag the starter down. Check the intake air electric heater circuit against the wiring diagram on page 250. Then work through the starter circuit and fuel system checks in the troubleshooting procedures on page 310 before condemning the starter.
Manual Section: Troubleshooting – Engine Problems p. 310Low oil pressure at idle with knocking noise from the bottom end
Drain the oil and cut the filter open to look for bearing material. Pull the pan and measure journal bearing crush; the spec is 0.15 mm to 0.25 mm (0.0059 to 0.010 inch) on page 270. Compare journals against the engine wear limits in Section 6, then refill the system with 25 l of oil.
Manual Section: Sec.6 p. 270Upper structure coasts past target when swing lever centered, swing motion jerky and uneven
Verify main relief pressure holds between 300 and 320 kg/cm2 against the spec on page 26 before touching the swing motor. Inspect the swing relief valve for stuck poppets and check pilot pressure at 40 kg/cm2. Test the swing brake for delayed engagement, and bleed air from the swing motor case before loading it.
Manual Section: Troubleshooting – Swing SystemFrequently Asked Questions
What are the recommended service intervals?
The manual outlines various service intervals including daily or every 10 operating hours, weekly or every 50 operating hours, 150 operating hours, monthly or every 250 operating hours, three months or every 500 operating hours, and six months or every 1,000 operating hours. p. 285
What fluids and capacities does this machine require?
The excavator requires 25 liters (6.6 gallons) for the engine oil system, 520 liters (137 gallons) for the fuel tank, and 360 liters (95 gallons) for the hydraulic tank. p. 28
How can I troubleshoot if the engine won't start?
If nothing happens when the starter key is turned, check for loose or broken wire connections and tighten them. If the engine does not start due to fuel system issues, check for air in the fuel line or a clogged feed pump filter, and bleed air or clean as necessary. p. 310
What are the valve clearance specifications?
The engine valve cold lash adjustment for both intake and exhaust is 0.3 mm (0.0118 inches). This specification is crucial for proper engine operation. p. 269
What torque specifications are listed?
The manual provides a comprehensive table of standard bolt torque specifications, ranging from M5 to M24, with values in both kg m and ft lb. For example, an M5 standard bolt requires 0.15 kg m (1.08 ft lb) of torque. p. 300
What format is this manual in?
You get a 344-page searchable PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Is this Daewoo 330-III Shop Manual printable?
Zero restrictions. The PDF is DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works.
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