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 TM 55-1905-223-24-3
Table 2-2. Troubleshooting-Cont
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
STEP 2.
Check if intake air system is restricted.
Check intake air restriction (para. 2-29).
STEP 3.
Check for intake air leaks between turbocharger and cylinder head.
Check for air leaks (paras. 2-29, 2-30 and 2-43).
STEP 4.
Check if turbocharger wheel is rubbing.
Replace turbocharger (para. 2-30).
STEP 5.
Check for loose injector.
Tighten or replace injector (para. 2-40).
STEP 6.
Check for fuel return line restriction.
Refer to Malfunction 22, Step 3.
STEP 7.
Check if engine is receiving too much fuel.
Replace fuel pump (para. 2-37).
STEP 8.
Check if turbocharger turbine seal is leaking.
Replace turbocharger (para. 2-30).
STEP 9.
Check for damaged injector cups.
a. Hold down injector at idle.
b. Observe change in smoke level.
c. Replace injector (para. 2-40).
26. Engine will not shut off.
NOTE
Shut off engine by turning fuel pump shutoff valve counterclockwise.
STEP 1.
Check if fuel pump manual override is open.
Check to make sure manual override shutoff screw is turned fully counterclockwise.
STEP 2.
Check if fuel pump shutdown valve disk is stuck.
Replace fuel shutdown valve (para. 3-19).
STEP 3.
Check for defective turbocharger seals.
Replace turbocharger (para. 2-30).
STEP 4.
Check if fuel return line is restricted.
Check lines for head to tank. (Refer to Item No. 22 of this table.)
2-44
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