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 TM 55-1905-223-24-5
Table 2-2. Troubleshooting-CONT
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
e.
If the gear pump gears do not turn, replace the fuel pump (para. 2-33).
STEP 11.
Check for gear pump check valves stuck open. Replace Check valves (para. 2-33).
18. Engine hard to start or will not start (exhaust smoke present).
STEP 1.
Check to see if engine cranking speed low (below 150 rpm). Make sure engine cranking
rpm's are correct (above 150 rpm).
STEP 2.
Check to see if engine driven units engaged. Disengage engine driven units from
crankshaft.
STEP 3.
Check coolant heater (para. 2-32). Repair coolant heater (para. 2-32).
STEP 4.
Check to see if fuel filter plugged. Replace fuel filter. Refer to PMCS Table 2-1, Item
11.
STEP 5.
Check for air in the fuel system.
a.
Tighten all fuel line connections.
b.
Tighten fuel filters.
c.
Bleed air from lines at fuel pump:
(1)
Crank the engine.
(2)
Loosen the fuel outlet line at the solenoid shutoff valve.
(3)
If air bubbles continue after initial release of air, replace the fuel pump (para.
STEP 6.
Check to see if fuel suction line is restricted. Inspect fuel lines for restrictions or damage.
Correct as required. Refer to Malfunction 17, STEP 4.
STEP 7.
Check air intake system for restriction. Refer to Malfunction 14, STEP 3.
STEP 8.
Check for contaminated fuel.
a.
Take a fuel sample and visually inspect for contamination.
b.
If fuel is contaminated, drain and clean fuel tank.
c.
Replace fuel in fuel tank.
19. Engine starts but will not keep running.
STEP 1.
Check for air in the fuel system. Refer to Malfunction 18, STEP 5.
STEP 2.
Check to see if engine driven units engaged. Disengage engine drive units.
2-44
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