Table 86
Troubleshooting Test Steps
Values Results
1. Driven Equipment
A. Inspect the mounting bolts for the driven equipment. Inspect the
alignment and the balance of the driven equipment.
B. Inspect the coupling.
Driven
equipment
Result The driven equipment and the alignment are not
OK.
Repair: Repair or replace the driven equipment.
Result: The driven equipment and the alignment are OK.
Proceed to Test Step 2.
2. Engine Supports
A. Inspect the mounts and the brackets while you run the engine
through the speed range. Look for mounts and brackets that are
loose and/or broken.
B. Check the alignment of the following before operating the en-
gine under load for any length of time:
· Mounts
· Coupling
Engine
supports
Result: The mounts and brackets are loose and/or
broken.
Replace the mounts and brackets that are loose and/or
broken.
Result: The mounts and brackets are not loose and/or
broken.
Proceed to Test Step 3.
3. Low Compression (Cylinder Pressure)
A. Perform a compression test. Refer to Systems Operation, Test-
ing, and Adjusting, “Compression - Test”.
Cylinder
compression
Result: The results of the compression test are outside
the specifications.
Repair: Investigate the cause and rectify any faults.
Note: Possible causes of low compression are shown in
the following list:
· Loose glow plugs
· Faulty piston
· Faulty piston rings
· Worn cylinder bores
· Worn valves
· Faulty cylinder head gasket
· Damaged cylinder head
Result: The results of the compression test are OK.
Proceed to Test Step 4.
(continued)
170 UENR4469-36
Symptom Troubleshooting
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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