TM 1-1520-238-23
7-362
7.93.
UTILITY HYDRAULIC ACCUMULATOR LEAK CHECK (AVIM) – continued
(1) Connect test stand hydraulic supply pressure
line to pressure port (2).
(2) Connect test stand hydraulic supply pressure
line to end cap air port (3).
(3) Apply 100 psi hydraulic pressure alternately
to pressure port (2) and air port (3) until all air
has been bled from accumulator (1).
CAUTION
During proof test, differential pressure
shall not exceed 4500 psi at any time.
b. Pressure proof test.
(1) Apply 3000 psi hydraulic pressure to air port
(3) and 1500 psi hydraulic pressure to pres-
sure port (2).
(2) Increase hydraulic pressure at air port (3) to
6000 psi.
(3) Hold pressure for 5 minutes.
(4) Relieve all pressure.
(5) Inspect accumulator (1) for deformation or
leakage. None allowed.
NOTE
Ports (4) and (5) are allowed leakage of 2
drops per minute.
(6) Apply 100 psi hydraulic pressure to pressure
port (2) to allow fluid to return to test stand
reservoir.
(7) Relieve all pressure and disconnect hydraulic
pressure line from air port (3).
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M04-3660-2
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M04-3660-3
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