TM 55-1520-240-23-6
7-280
TEST CARGO DOOR SEQUENCE VALVE (AVIM)
(Continued)
7-280
1.
Connect pressure hose (1) to PRESS port (2)
of sequence valve (3).
2.
Connect return hose (4) to RET port (5) of
sequence valve (3).
3.
Connect hose (6) to CYL 1 port (7) of sequence
valve (3).
4.
Connect hose (8) to CYL 2 port (9) of sequence
valve (3).
5.
Open shutoff valves (10 and 11).
6.
Close shutoff valve (12).
7.
Push in MANUAL OPER knob (13). Apply
4500 psi pressure to PRESS port (2). Maintain
pressure for 2 minutes.
8.
Check sequence valve (3). There shall be no
leaks or permanent deformation.
9.
Reduce pressure at PRESS port (2) to 0 psi.
10.
Release MANUAL OPER knob (13).
11.
Close shutoff valve (11).
12.
Disconnect hose (4) from RET port (5).
13.
Push in MANUAL OPER knob (13).
14.
Apply 3000 psi pressure to PRESS port (2).
Maintain pressure for 3 minutes. When 2
minutes have passed, check RET port (5) for
leaks. Leaks from RET port shall not exceed 20
drops per minute after 2 minutes.
15.
Reduce pressure at PRESS port (2) to 0 psi.
16.
Release MANUAL OPER knob (13).
7-1041
