Table 4-2 UNIT TROUBLESHOOTING - Continued
TEST OR INSPECTION
PUMP WILL NOT PRIME - Continued
Check seals on all suction and discharge piping.
Replace victaulic couplings and/or seals in discharge/suction cap as required.
Priming pump failed.
Refer to Direct Support Level for repair.
PRIMING TANK OVERFLOWS DURING NORMAL PUMP OPERATION
Stop and start pump a few times while pumping from draft.
If condition does not correct itself, this is due to failed pump priming valve. Refer to Direct
Support Level for repair.
PUMP CASING LEAKS WATER WHILE PUMPING
Check location of leak
Refer to Direct Support for repair.
AIR OPERATED VALVE FAILS TO OPEN OR CLOSE
Check air connections or hose for leaks.
Tighten connections or replace hose.
Check shuttle valve for leaks and correct operation.
Replace shuttle valve, (see para. 4-18).
Check air cylinder for ease of operation - with no air valve may be operated manually.
Replace valve or air cylinder, (see para. 4-18).
VALVES LEAKING WATER/AGENT
Check actuator linkage.
Adjust actuator linkage.
Valve dirty or worn.
Clean or replace valve, (see para. 4-18).