WEICHAI WD10 - Explode View of the Whole Engine

Service Manual for WD10 Diesel Engine
25
325 Engine Gives off Black Smoke
1. Blockage of intake pipe or high exhaust
back pressure
Clean it up.
2. Inferior fuel
Clean and replace.
3. Incorrect valve or injection timing
Adjust valve clearance and fuel supply advance
angle according related requirements.
4. Bad atomization
Check and repair or replace.
5. Overmuch fuel pumped by the injection
pump
Check and adjust (should be performed by
professional personnel).
6. Underpressure of supercharging system
Check and eliminate leakage in pipes and joints.
7. Malfunctioned turbocharger
Check and replace.
8. Intercooler is damaged or leaking air
Replace or repair.
9. Wrong application point of smoke limiter
Readjust (should be performed by professional
personnel).
326 Engine Gives off White and Blue Smoke
1. Inferior fuel, high water content
Replace the fuel.
2. Too low coolant temperature
Check working temperature of thermostat, replace it
if necessary.
3. Incorrect valve or injection timing
Check and adjust.
4. Bad atomization
Check and repair.
5. Low compression pressure, incomplete
combustion and cylinder expansion
caused by piston
Check and repair piston ring, cylinder sleeve,
cylinder gasket.
6. Incomplete run-in of piston ring and
cylinder sleeve
Continue the run-in process.
7. Openings of piston ring are not staggered
Adjust and reassemble.
8. Piston oil ring failure
Replace.
9. Oversized fitting clearance of cylinder
sleeve
Repair or replace.
10. Wear of turbocharger sealing ring
Check and replace.
11. Wear of turbocharger thrust bearing
Check and replace.
12. Blockage of turbocharger oil return pipe
Clean or repair