Operation Manual of WEICHAI GENSET
personnel for repair or replacement
2
Poor quality of diesel
Use fuel of appropriate grade
3
The air intake system is Clean the intake manifold and air
unobstructed
filter, and replace them if necessary
4
The exhaust back pressure is too Clean carbon deposit in exhaust
high
manifold and silencer
5
The turbocharger is dirty
Clean the turbocharger
Check and replace the fuel filter,
6
The fuel supply system is blocked sealing gasket and oil supply
pipeline
7
Fuel supply system leakage
Replace in time
Contact after-sales service
8
Faulty fuel injection pump
personnel for recalibration or
replacement
9
Excess oil in oil pan
Drain excess oil
9. Excessive consumption of lubricating oil
Main cause: engine oil burnt
S/N Fault
1
The lubricating oil grade is incorrect
The piston ring, piston and cylinder
2
liner are seriously worn, causing oil
inflow in the combustion chamber
The valve stem and valve guide are
3
seriously worn, causing oil inflow in
the combustion chamber
Excessive oil in the oil pan leads to
4
oil inflow in the combustion
chamber
Treatment method
Use lubricating oil of correct grade.
Replace the piston ring, piston and
cylinder liner
Replace the valve stem and valve
guide
Drain excess oil
10. Abnormal noise or vibration from diesel engine during operation
S/N Fault
Treatment method
Early oil injection or uneven oil
supply in each cylinder causes crisp
1
and rhythmic metal knocking sound Adjust the oil supply advance angle
in the cylinder, and the sound is or adjust the oil quantity uniformity
obviously louder at start-up or low
speed
2
The clearance between the intake
and exhaust valves is too large,
Adjust valve clearance
63
