TM 10-4320-309-14
TM 4320-14/1
Table 4-1. Direct Support Troubleshooting Chart - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5. BLACK SMOKE EXHAUST
Do not operate pump without liquid in the volute over 3 minutes.
Step 1.
Reduce load by removing suction hose from water/’fuel.
If color improves, refer to para 4-16 or 4-17.
if color does not improve, check drop in rotation speed, Malfunction Num-
ber 6.
6. DROP IN ENGINE ROTATION SPEED
Step 1.
Check exhaust smoke color. Check abnormal operating sound.
Fuel system maintenance. (Refer to para 4-16 and 4-17.)
7. BLUISH-WHITE EXHAUST SMOKE.
Step 1. Check engine rotation.
Uneven rotation. (Refer to para 4-16 and 4-17.)
8. PUMP DOES NOT PUMP
Step 1.
Check pump priming procedure. (Refer to para 2-8.)
Replace shaft seal. (Refer to para 4-12.)
4-3
