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 TM 55-1905-220-14-8
4-7A. PORTABLE FIRE PUMP (PE-250) (Continued).
(2) Hydrostatic leakage test. To perform the hydrostatic leakage test, proceed as follows:
(a) Remove check valve (1) in exhaust cooling line and reinstall it in the opposite direction.
(b) Remove check valve (2) in priming system line and reinstall it in the opposite direction.
(c) Connect pump to a water pressure source not to exceed 150 psi (1034.2 kPa).
(d) With water pressure applied, open discharge valve until water comes out of discharge valve.
(e) Close discharge valve and allow pressure to rise in pump.
(f) Inspect pump for leakage.
(g) Shut down water pressure to pump.
(h) Replace any leaking component and retest pump.
(i) Test shut down after hydrostatic leakage test consists of removing water pressure source and
reversing exhaust cooling line and priming system check valves. Upon completion of shut
down the pump is operable and ready for service.
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