TM 9-2320-272-2491
Table 2-2. Mechanical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 4. Check for white smoke during cranking.
a, If white smoke is seen, air may be in fuel system.
Prime fuel system (para. 2-22),
b. If white smoke is seen, coolant may be in combustion chambers.
Remove dipstick. If coolant is present, notify DS maintenance.
WARNING
Eyeshields must be worn when cleaning with compressed air.
l
Compressed air source will not exceed 30 psi (207 kPa). Failure
to do so may result in injury to personnel.
l Diesel fuel is highly flammable. Do not perform fuel system
procedures near open flame. Injury to personnel may result.
Step 5.
Check fuel transfer pump for proper operation.
a. Check for loose fuel supply hose at fuel filter head.
b. Operate hand primer on the fuel transfer pump and check for fuel.
If fuel is present, replace fuel transfer pump (para. 3-20).
Step 6.
Check for fuel leaking from fuel pressure transducer. If fuel is present:
a. Check fuel transfer pump for proper operation (refer to step 5).
b. Check for clogged fuel injector supply line.
If clogged, clear with compressed air or sturdy wire.
Step 7.
Inspect fuel filter for dirty and/or clogged condition (para. 3-30).
Replace fuel filter if clogged or dirty (para. 3-30).
Step 8.
Inspect fuel lines and connections for leaks, breaks, obstructions, or damage.
a. Visually check for leaks. If leaks are present at connection, tighten.
b. If leaks are result of cracked, split, or damaged tubing, replace fuel line(s) (TM 9-243).
C. Disconnect fuel line at both ends. If fuel line is clogged, clear with compressed air or
sturdy wire.
d. Reconnect fuel line.
e. Replace fuel filter (para. 3-30).
f. Prime fuel system (para. 3-22).
g. If not corrected, notify DS maintenance.
Step 9.
Check for fuel contamination.
a. Open drainvalve on fuel filter/water separator and drain approximately 1 pt (0.478 L) of
fuel into a glass container.
b. If contamination is present, continue to drain fuel up to 1 qt (0.946 L).
c. If contamination is still present, drain fuel tank(s) (para. 3-27).
d. Clean and flush fuel system. Dry with compressed air.
e. Replace fuel filter (para. 3-30).
f. Refill tank(s) with fuel (TM 9-2320-272-10).
g. Prime fuel system (para. 3-22).
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