SEBU8337 61
Maintenance Section
Crankshaft Vibration Damper - Inspect
i02573905
Cranksh aft Vibration Dam per
- Inspect
Damage to the crankshaft vibration damper or failure
of the crankshaft vibration damper can increase
torsional vib
rations. This can result in damage to
the crankshaft and to other engine components. A
damper that is damaged can cause excessive gear
train noise a
t variable points in the speed range.
The damper is mounted to the crankshaft which is
located behi
nd the belt guard on the front of the
engine.
Visconic Damper
The visconi
c damper has a weight that is located
inside a fluid filled case. The weight moves in the
case in order to limit torsional vibration.
Inspect the damper for evidence of fluid leaks. If
a fluid leak is found, determine the type of fluid.
The fluid in t
he damper is silicone. Silicone has the
following characteristics: transparent, viscous, and
smooth.
If the fluid leak is oil, inspect the crankshaft seals for
leaks. If a leak is observed, replace the crankshaft
seals.
Inspect the damper and repair or replace the damper
for any of
the following reasons:
•
The damper is dented, cracked, or leaking.
•
The paint on the damper is discolored from heat.
•
The engine
has had a failure because of a broken
crankshaft.
•
Analysis
of the oil has revealed that the front main
bearing is badly worn.
•
There is a
large amount of gear train wear that is
not caused by a lack of oil.
•
The tempe
rature of the damper fluid is too high.
Refer to the Service Manual or consult your Perkins
distribu
tor for information about damper replacement.
i02151646
Driven Equ ipm en t - Check
Refer to the OEM
specifications for more information
on the following maintenance recommendations for
thedrivenequipment:
•
Inspection
•
Adjustment
•
Lubrication
•
Other maintenance recommendations
Perform any ma
intenance for the driven equipment
which is recommended by the OEM.
i02784833
Electronic Unit Injector -
Inspect/Adjust
Be sure the engine cannot be started while this
maintenance is being performed. To prevent pos-
sible injury, do not use the starting motor to turn
the flywheel.
Hot engine components can cause burns. Allow
additional time for the engine to cool before mea-
suring/adjusting the unit injectors.
The electronic unit injectors use high voltage. Dis-
connect the unit injector enable circuit connector
in order to pre vent personal injury. Do not come
in contact with the injector terminals while the en-
gine is running.
The operation of Perkins engines with improper
adjustments of the electronic unit injector can reduce
engine efficiency. This reduced efficiency could result
in excessive fuel usage and/or shortened engine
component life.
Only qualified service personnel should perform
this maintenance. Refer to the following topics
for your engine for the correct procedure: Refer
to the Systems Operation, Testing and Adjusting,
“Electronic Unit Injector - Test” for the test procedure,
and Systems Operation, Testing and Adjusting,
“Electronic Unit Injector - Adjust” for the correct
procedure for adjusting the injectors.
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