TM 3-4230-237-10
0014 00
TROUBLESHOOTING PROCEDURES - Continued
Table 1. Troubleshooting - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
PUMP UNIT - Continued
2. ENGINE CRANKS BUT WILL NOT START - Continued.
Step 3. Check for air lock in fuel line.
Open vent in fuel filter/water separator, using adjustable wrench. Bleed air from fuel line
and close vent.
Vent
Drain
Step 4. Check fuel filter/water separator for water.
Drain fuel filter/water separator (see WP 0016 00, PMCS, task 36)
and attempt restart.
Step 5. Pump manual primer on engine fuel pump while cranking engine.
If engine still will not start, notify Unit Maintenance.
Step 6. Check starter and battery terminals for tightness and corrosion.
Clean terminals (Page 0016 00-2).
If engine still will not start, notify Unit Maintenance.
3. ENGINE RUNS IRREGULARLY
WARNING
Diesel fuel is flammable. Keep open flames, sparks, and ignition sources 50 feet (15 meters) away at all
times. Have a CO2 or dry chemical fire extinguisher available at all times. Avoid spilling fuel.
Step 1. While engine is running, check fuel supply level.
If fuel tank is more than 1/2 empty, turn off engine and fill 1/2 full of fuel, restart engine
and go on to Step 2.
Step 2. Check that temperature is above 32F (0C).
a. If temperature is below 32F (0C), preheat engine for 1 minute.
b. If engine still runs irregularly, check fuel source for thickened fuel.
c. If fuel is congealed, shut down system and notify Unit Maintenance.
0014 00-2
