Severe Vibration; Engine Overheat; Excessively Large Oil Consumption - Bison BS-20KVA Operation Manual

Reason of failure
1. Uneven fuel supply for each cylinder;
some fuel injection nozzles have bad
atomization, severe gas leakage and
compression ratios of cylinders differ
greatly with each other.
2. Water and gas mixed in the diesel fuel.
The alignment is not proper for engine
3.
installation and supporting bolts are
not tightly fixed.
4. Knocking noises heard from diesel
engine during operation.
Fuel is getting into the crankcase; oil
1.
is diluted with water; oil is insufficient
or excessive; the flow rate of oil is too
small with low pressure; the bearing
clearance is too small.
2. Water pump impeller is damaged or
cracked; fan belt is slippery; radiator
and fan are not installed in proper
positions; failure of thermostat; blockage
of cooling system; incrustation is
greatly built up in water jacket;
insufficient displacement of water
pump; lack of water; fuel gas is
getting into the water channel because
of the broken cylinder head liner.
Use wrong oil grade with low oil
1.
viscosity.
2. Great abrasion between piston and
cylinder liner; blockage
returning hole for piston ring groove.
3. Piston ring is glued; F-side of air ring
is installed inversely with much
abrasion.
Oil leakage discovered for the front
4.
and rear oil seal of crankshaft,
connecting surface of oil pan and side
cover seals.
5. The oil temperature and pressure is
too high.

6. Severe vibration

1.
2.
3.
4.

7. Engine overheat

1.
2.

8. Excessively large oil consumption

1.
2.
of oil
3.
4.
5. Reduce the temperature(Refer to the
last section); check and adjust the
relief valve of oil pump.
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Troubleshooting
Inspect and adjust fuel supply of fuel
injection pump; repair fuel injection
nozzle; eliminate leakage and check
the compression pressure for each
cylinder.
Discharge the air and make the diesel
fuel precipitate.
Check the alignment and tighten the
bolt securely.
Check the fuel supply advanced angle
and apply the load after the diesel
engine is warmed up.
Inspect and replace piston ring;
replace the oil; check the oil level;
check the abrasion of outer rotor
inside the oil pump; check the
clearance between the bearings.
Check and replace water pump
impeller; Check the tension of fan belt
or replace the belt; check the
installation position of radiator; check
the performance of thermostat; clean
the cooling system and water jacket;
check the clearance of water pump
impeller; refill the water; replace
cylinder head liner.
Change to the designated oil grade.
Replace and clean the oil returning
hole.
Clean or replace.
Check or replace relevant spare parts.