Quantcast PUMP DOES NOT PRIME.

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TM 9-2320-279-10-3
Troubleshooting Index (Cont)
3-16. TROUBLESHOOTING MALFUNCTIONS (CONT).
Table 3-5.
Troubleshooting
Malfunction
Test or Inspection
Corrective Action
18. PUMP DOES NOT PRIME.
Step 1. Check if all discharge valves are closed.
If discharge valve is open, close it.
Step 2. Check if manual priming valve is closed.
If manual discharge valve is open, close it.
Step 3. If pumping from water tank: Check water level in tank.
If water level is low, fill tank.
Step 4. If pumping from draft: Check placement of suction hose.
If suction hose is not placed correctly, reposition suction
hose.
Step 5. If pumping from draft, make sure vertical height from end of
suction valve to pump is not more than 10 ft. (3 m).
If vertical height is more than 10 ft. (3 m), reposition
vehicle to reduce vertical height.
Step 6. If pumping from a hydrant: Check if inlet water pressure is
present.
If water pressure is not present, correct problem.
Step 7. If problem still exists, use manual pump priming system to
prime pump, and notify Supervisor.
19. PUMP LOSES PRIME.
Step 1. If pumping from water tank: Check water level in tank.
If water level is low, fill tank.
Step 2. If pumping from draft: Check placement of suction hose.
If suction hose is not placed correctly, reposition suction
hose.
Step 3. If pumping from draft: Check strainer for blockage.
If strainer is blocked, clear blockage and reposition
suction hose.
Step 4. If pumping from draft, make sure vertical height from end of
suction hose to pump is not more than 10 ft. (3 m).
If vertical height is more than 10 ft. (3 m), reposition
vehicle to reduce vertical height. If unable to reposition
vehicle, reduce the number of open discharge valves.
Step 5. If pumping from a hydrant: Check if inlet water pressure is
present.
If water pressure is not present, correct problem.
Step 6. If problem still exists, notify Supervisor.



 


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