WEICHAI WD10 Service Manual - page 36
Service Manual for WD10 Diesel Engine
26
327 Turbocharger Intake Port and Intake Pipe Are Accumulated with
Engine Oil
1. Turbocharger sealing failure
Repair or replace the turbocharger.
2. Oil-gas separator failure
Replace.
3. High engine oil level in oil sump
Check oil dipstick and drain redundant engine oil
out.
328 Unstable Engine Speed
1. Inferior fuel, high water or wax content
Replace the fuel.
2. Air absorbed in through fuel sucking pipe
Check sealing performance of fuel pipes and joints,
bleed the air out.
3. Governor weight and governor spring out
of order
Check and adjust (should be performed by
professional personnel).
4. Uneven fuel supply
Check and adjust (should be performed by
professional personnel).
5. Unstable atomization of injector
Check and repair.
6. Resonance of turbocharger
Check and clean air compressor passageway, clean
up the dirt, clear away the carbon deposit in exhaust
passageway.
7. Damaged turbocharger bearing
Replace.
329 Low Engine Oil Pressure
1. Low engine oil level in oil sump, lack of
engine oil
2. Pressure regulating valve in main oil
gallery failure
Check the valve, clean and repair.
3. Blockage or fracture of oil strainer,
engine oil pipe and joint gaskets.
Check and clean air compressor passageway, clean
up the dirt, clear away the carbon deposit in exhaust
passageway.
4. Wrong engine oil brand
Replace engine oil according to related
requirements, choose suitable engine oil brand.
5. Leakage of engine oil pump inlet pipe
Check the oil pipe and pipe joints, repair or replace.
6. High cooling system water temperature,
high engine oil temperature.
Check cooling system and remove the problem.