Operation and Maintenance Manual and User Service Guide for Industrial Power WP10 Series Diesel Engine
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lead to knocking of cylinder.
6
The fuel injectors have different amount of fuel
distribution and injection time.
Check and adjust it
7
Air enters the fuel system.
Check or degassing.
8
Air enters the fuel system
Check the fuel system and
degassing it.
9
Timing gear plays forward/backward.
Check each gear for
tightness.
6.6 Water pump can
’
t absorb water or pump enough water
S/N
Cause
Troubleshooting
1
Air enters the water pump or suction pipe.
Fill them with water to drain the
air.
2
water pipe is clogged or froze (cold
season)
Clean or fill it with hot water or
antifreeze.
3
Seals of coolant pump are damaged or
leaked.
Repair or replace it
4
Water pump belt is too loose.
Check and adjust it
5
Water pump has too much scale.
Remove the scale.
6
Water pump has excessive suction head.
Refer to the specifications to
install the water pump.
6.7 Too low oil pressure
S/N
Cause
Troubleshooting
1
Oil quality is poor (because as the diesel
engine is running, the oil pressure
gradually drops).
Refer to the specifications to
select the oil.
2
Diesel engine overheats or the oil is
thinned.
Refer to the section 6.8 in this
chapter.
3
Oil filter is clogged.
Clean it.
4
Oil pipe joint is loosened or air enters oil
pipeline.
Check and tighten it.
5
Diesel fuel is mixed in the oil.
Find out the cause.
6
Pressure-regulating valve spring is
fractured.
Replace it.
7
Oil in the oil tank drop or the suction head
of oil pump is excessive big.
Refill the oil, or reinstall the oil
pump or oil tank.
8
The clearance between the connecting rod
bearing and main bearing is widened.
Check or replace it.
