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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
Direct Support and General Support Troubleshooting Table (Cont'd)
Table 2-1.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Inspect air inlet manifold for oil.
Step 4.
If oil is present, repair turbocharger (page 4-18).
END OF TESTING!
FUEL SYSTEM
16. SUDDEN CHANGES IN ENGINE SPEED (RPM)
Replace fuel injection pump housing and governor (page 4-26).
END OF TESTING!
17. LOW POWER - LOSS OF POWER
Step 1.
Operate engine at rpm where misfiring or rough operation occurs. 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 performance. 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).
a.
Repair (page 4-8) or replace defective nozzle (TM5-2410-237-20).
b.
If nozzle is operating properly, replace the fuel injection pump for
that cylinder (page 4-14).
Step 2.
Check fuel pressure at the fuel injection housing inlet. Pressure must be
at least 15 psi.
a.
If pressure is below 15 psi, service primary fuel filter (TM5-2410-
237-20).
b.
If fuel pressure is still below 15 psi, repair or replace fuel transfer
pump (page 4-10).
Step 3.
Check fuel injection timing (page 4-26).
If necessary, adjust fuel injection timing (page 4-26).
2-13
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