Perkins M216C - Engine Vibration

KENR9126 51
Troubleshooting Section
6. Check that the low-pressure fuel lines are tight
and correctly s
ecured.
7. Check the fuel filters.
8. Check the diesel fuel for contamination.
9. Check for air
in the fuel system.
10.Ensure that the fuel system has been primed.
11. Check the fuel pressure.
12.If necessar
y, repair any faults.
13.If there are no apparent faults, refer to “Electronic
Unit Injec
tors”.
Electronic Unit Injectors
1. With the engine speed at a fast idle, use the
electronic service tool to isolate one cylinder at
atime.No
te if there is any reduction in engine
speed. If a reduction in engine speed is not noted,
the isolated electronic unit injector is not operating
under no
rmal conditions. If the isolation of a
particular cylinder results in a reduction of engine
speed that is less than normal, this may indicate
that the
electronic unit injector is operating below
normal performance.
2. Remove
the electronic unit injector from the
suspect cylinder.
3. Instal
l a new electronic unit injector.
4. Repeat the test in 1. If the fault is still apparent,
remov
e the replacement electronic unit injector
and install the original electronic unit injector.
5. If the
fault is not eliminated, check for active
diagnostic fault codes.
i04010458
Engine Vibration
Note: This is not an electronic system fault.
Probable Causes
•
Vibration damper
•
Engine supports
•
Low compression (cylinder pressure)
•
Individual malfunct ioning cylinder
•
Electronic unit injectors
Recommended Ac
tions
Vibration Damper
Check the vibration damper for damage. Install a
new vibration damper, if necessary. Inspect the
mounting bolt
s for damage and/or for wear. Replace
any damaged bolts.
Ensure that t
he repairs have eliminated the fault.
If the vibration is still present, proceed to “Engine
Supports”.
Engine Supports
1. Check for an
y of the following conditions:
•
Loose engine supports
•
Loose mounting brackets or broken mounting
brackets
•
Loose bolts
•
Omitted b
olts
2. Make all necessary repairs. Ensure that the
repairs
have eliminated the fault. If the vibration
is still present, proceed to “Low Compression
(Cylinder Pressure)”.
Low Compression (Cylinder Pressure)
1. Perfor
m a compression test.
2. If low compression is noted on any cylinders,
inves
tigate the cause and rectify the fault.
Possible causes of low compression are shown
in the
following list:
•
Loose glow plugs
•
Faulty piston
•
Faul
ty piston rings
•
Worn cylinder bores
•
Worn valves
•
Fau
lty cylinder head gasket
•
Damaged cylinder head
3. Perform all necessary repairs.
4. En
sure that the repairs have eliminated the fault.
5. If the repair does not eliminate the fault refer to
“
Malfunctioning Individual Cylinder”.