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Page Title:
Table 2-1. Direct Support and General Support Troubleshooting Table - continued |
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 TM5-241O-237-34
Table 2-1.
Direct Support and General Support Troubleshooting Table (Cont'd)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 5.
Check cylinder head.
Replace valves that have worn stems or burned valves (page 3-30).
a.
b.
If a valve is replaced, replace corresponding valve seat insert and
valve guide (page 3-30).
Replace a warped cylinder head (page 3-30).
c.
Step 6.
Inspect valve lifters (page 3-101).
Replace damaged valve lifters.
a.
b.
Replace valve lifters that do not meet specifications.
END OF TESTING!
10. EXCESSIVE ENGINE VIBRATION
Step 1.
Operate engine at rpm where vibration begins. Loosen the fuel line nut at a
fuel injection pump. This will stop fuel flow to that cylinder. Do this
for each cylinder until a loosened fuel line is found that makes no
difference in engine operation. Be sure to tighten each fuel line nut after
the test before the next fuel line nut is loosened.
When a cylinder is found where the loosened line does not make a
difference in engine performance, test the fuel injection nozzle for that
cylinder (page 4-8).
Repair (page 4-8) or replace defective nozzle (TM5-2410-237-20).
a.
b.
If nozzle is operating properly, replace the fuel injection pump for
that cylinder (page 4-14).
Step 2.
Check for loose or damaged vibration damper.
a.
Tighten vibration damper capscrews to 7510 lb. ft.
b.
Replace damaged vibration damper (page 3-67).
Step 3.
Check for loose or damaged crankshaft pulley.
a.
Tighten pulley capscrew to 23020 lb. ft.
Replace damaged crankshaft pulley (page 3-65).
b.
2-10
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