Deutz WP4C Series, Руководство по эксплуатации и обслуживанию

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Deutz WP6C/WP4C Series Marine Diesel Engine Use and Maintenance Manual
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5.5 Unstable diesel engine operation
S/N Cause Troubleshooting
1
The clearance increases due to inflexible movement of
governor flyweight movement or wear factors.
Check for the existence of stuck
phenomenon. Repair or replace
accordingly.
2
The buffering clamp spring of the speed governor loses
its elasticity or is fractured and results in control rack
vibration and unstable speed.
Check or replace
3
The diesel engine speed is too low and the engine runs
at the intermediate speed. The land engine
double-speed governor fails to operate automatically.
Accelerate to the rated speed.
4 The diesel engine load changes frequently.
Check the condition of load
output.
5
Some of cylinder ignites interruptedly. Therefore, these
cylinders
explode fiercely due to excessive
accumulated fuel and this leads to cylinder knocking.
Check the fuel system.
6
Injection volume and injection time for injection
pumps are different.
Check and adjust
7 There is air in the fuel system. Check and carry out air bleeding
8 There is moisture in the fuel system.
Check the fuel and carry out
water drainage.
9 There is left and right movement of timing gear. Check all gears for fastening.
5.6 Water pump does not pump water or water supply is insufficient
S/N Cause Troubleshooting
1
There is air in the water pump or water
absorption pipe.
Fill some water to bleed air from it.
2
The water pipe is clogged or frozen (in
cold season).
Remove clogging or fill the cooling system
with hot water or fill with antifreeze in
advance.
3
The water pump sealing device or sealing
gasket is damaged and there is air
leakage.
Overhaul or replace.
4 The water pump belt is too loose. Check and adjust.
5
There is excessive water scale in the
diesel engine water pump.
Remove water scale.
6
The water pump suction height is
excessive. Install the water pump according to relevant
specifications.