Engine and wheel loader, end to end: this 365-page Daewoo DB58T and MEGA200 service manual PDF runs from the DB58T diesel's cylinder head, fuel injection and turbocharger through the MEGA200's powershift transmission, planetary axles, brakes, steering and electrical system. Hydraulic schematics trace oil from the main pump through the main control valve and remote control valve out to the hydraulic cylinders and accumulator, and wiring diagrams map the starting, preheating, charging and monitoring circuits. The torque converter and transmission section fills more than a quarter of the book, taking you through clutch arrangement and modulation before the axle and wet disc brake chapters. Set intake and exhaust valves to 0.40 mm cold, and pull connecting rod cap bolts to 12 ± 0.25 kg-m. Chasing a clutch modulation fault through a powershift without factory data eats whole days. Bookmarks split the engine from the loader, the text searches cleanly, and your MEGA200 is back cycling material sooner.
What's Inside This Daewoo DB58T, MEGA200 Manual
| System | Pages | Key Topics |
|---|---|---|
| Engine DB58T | 5-26 | Engine Specification, Specified Tightening Torque, Oil Filter Replacement, Fuel Filter Replacement, Injection Timing, Compression Pressure Measurement, Turbocharger Inspection |
| Engine Disassembly and Reassembly | 27-82 | External Parts, Major Components, Rocker Arm Shaft, Cylinder Head, Piston, Connecting Rod |
| Lubricating System | 83-90 | Lubricating Oil Circuit, Oil Pump, Oil Filter, Oil Cooler |
| Cooling System | 91-98 | Coolant Circuit, Water Pump, Thermostat |
| Fuel System | 99-106 | Fuel Circuit, Fuel Filter, Injection Nozzle |
| Turbocharger | 107-110 | General Description, Turbocharger Identification, Rotor Shaft Play Inspection |
| Troubleshooting | 111-116 | Hydraulic Circuit Diagram, Electric Circuit Diagram, Worldwide Net Work |
| Wheel Loader Mega200 | 117-130 | Machine Specification, Assembly Drawing, Main Parts and Functions, Control Station, Gauges and Switches, Control Levers |
| Hydraulic System | 131-164 | Hydraulic Circuit, Main Control Valve, Main Pump, Remote Control Valve, Hydraulic Cylinder, Accumulator |
| Torque Converter and Transmission | 165-268 | Torque Converter, Powershift Transmission, Clutch and Gear Arrangement, Transmission Clutch Modulation |
| Axles | 269-292 | Self-Locking Differential, Final Reduction Planetary Gear, Wet Disc Brake, Parking Brake |
| Brake System | 293-300 | Hydraulic Circuit, Service Brake, Parking Brake, Brake Pedal Valve, Brake Supply Valve, Accumulator |
| Steering System | 301-320 | Hydraulic Circuit, Steering Valve, Cushion Valve, Priority Valve, Unloader Valve |
| Electrical System | 321-364 | Battery, Engine Starting System, Engine Stop System, Engine Preheating System, Charging System, Monitoring System |
| Worldwide Network | 365 |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Intake and exhaust Valve clearance(cold) | 0.40 mm | p. 19 |
| Torque for new bolts of cylinder head | 7.0-9.5 kg-m | p. 11 |
| Torque for new bolts of cylinder head | 7.0 -> 9.5 ± 0.5 kg-m | p. 11 |
| Torque for reused bolts of cylinder head | 7.0-11.5 kg-m | p. 11 |
| Torque for bolts holding crankshaft bearing cap | 2.4 ± 1 kg-m | p. 11 |
| Torque for bolts of connecting rod bearing cap | 12 ± 0.25 kg-m | p. 11 |
| Torque for bolts holding flywheel to crankshaft | 22.3 ± 2.2 kg-m | p. 11 |
| Torque for bolts holding flywheel to crankshaft | 22.3 ± 2.2 kg-m | p. 11 |
| Torque for center bolt | 5.3 ± 1.0 kg-m | p. 13 |
| Torque for drain plug | 1.8 ± 0.2 kg-m | p. 13 |
| Main bearing cap torque | 24.1 ± 1 kg·m (173.5 ± 7.2 lb.ft) | p. 57 |
| Connecting rod and bearing cap bolt tightening torque | 12 ± 0.25 kg·m | p. 51 |
Daewoo DB58T, MEGA200 Common Problems This Manual Covers
Daewoo DB58T engine on MEGA200 loader cranks on the starter but is hard to start or won't fire
Check the starter circuit first, then work through the fuel system and compression pressure checks in the engine troubleshooting charts starting on page 112. Inspect the fuel circuit and fuel filter following the Fuel System section on page 99. If fuel delivery checks out, test compression pressure before you pull anything apart.
Manual Section: Engine Troubleshooting p. 112Engine lacks power under load with excessive exhaust smoke and high fuel consumption
Check the lack of power, exhaust smoke and fuel consumption charts in the engine troubleshooting section on page 112. Inspect the fuel filter and injection nozzles following page 99, then check turbocharger rotor shaft play using the inspection on page 107. Test compression pressure last if fuel and turbo check out.
Manual Section: Engine Troubleshooting p. 112Engine water pump or thermostat suspect when the engine overheats during heavy loading cycles
Check the overheating chart in the engine troubleshooting section on page 112 first. Inspect the water pump and thermostat and trace the coolant circuit following the Cooling System section on page 91. When you refill, note the engine alone holds 12.0 L of coolant per page 9.
Manual Section: Cooling System p. 91Loader hydraulic cylinder creeps under load with visible oil leaks at the cylinder
Inspect the cylinder for external oil leaks, then test for cylinder creep using the Hydraulic Cylinder Troubleshooting checks in the Hydraulic System section on page 158. If creep persists with no external leak, verify oil flow and pressure to the cylinder before replacing anything. Insufficient flow and pressure have their own checks in the same table.
Manual Section: Hydraulic Cylinder Troubleshooting p. 158Powershift transmission shows low clutch pressure, low charging pump output and transmission overheating
Check clutch pressure and charging pump output against the Transmission Troubleshooting table at the back of the Torque Converter and Transmission section, starting on page 266. Verify the clutch modulation circuit while you are there. If the converter is noisy or the machine lacks power along with the heat, work those branches of the same table before opening up the transmission.
Manual Section: Transmission Troubleshooting p. 266Boom operation goes slow and powerless, with low pilot pressure on the loader controls
Check pilot pressure first using the Hydraulic System Troubleshooting flow charts on page 356, then follow the powerless and speedless operation branch. Inspect the main pump, main control valve and remote control valve following the Hydraulic System section starting on page 131. Use the hydraulic schematic on page 133 to trace the boom circuit.
Manual Section: Hydraulic System Troubleshooting (Flow Charts) p. 356Frequently Asked Questions
How do you troubleshoot hard starting, low power, overheating, or stalling on a DB58T engine?
Troubleshooting for these issues is detailed in the Engine section. For hard starting or insufficient compression, check if the cylinder head gasket is broken, piston rings are seized, or valve clearance is incorrect. For overheating, check if the cooling water level is low, the radiator cap pressure valve spring is weakened, or the thermostat is defective. Refer to the troubleshooting tables on pages 112 and 113 for specific causes and corrections. p. 112
What are the replacement specifications for fuel filters on the DB58T engine?
To replace the fuel filter, loosen the drain plug to drain the fuel, then loosen the center bolt to remove the filter housing, spring, washer, packing, and element. Wash the housing in clean diesel oil and reassemble in reverse order using a new element. Ensure packings are correctly seated to prevent fuel leakage. p. 14
What is the specified tightening torque for the cylinder head bolts on the DB58T engine?
The tightening torque for new cylinder head bolts is 9.5 ± 0.5 kg-m (68.6 ± 3.6 lb.ft) for the second step, while reused bolts require 11.5 ± 0.5 kg-m (83.1 ± 3.6 lb.ft). The first step for all bolts is 7.0 kg-m (50.6 lb.ft). p. 76
What is the valve clearance specification for the DB58T engine?
The valve clearance for both intake and exhaust valves at cold engine temperature is 0.40 mm (0.016 in). p. 19
What is the lubricating oil capacity for the DB58T engine?
The lubricating oil capacity for the DB58T engine is 21.5 liters. p. 9
What do I get after purchasing this Daewoo DB58T manual?
You download the Service Manual yourself: 365 pages, searchable PDF, available immediately. Keep a copy on every device you use.
Is printing allowed for this Daewoo DB58T Service Manual?
Yes. It prints from any PDF reader, so run off the pages you need for your own repair work.
Reviews
There are no reviews yet.