TM 55-1520-240-23-6
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TEST BRAKE MASTER CYLINDER (AVIM)
(Continued)
7-228
1.
Position brake master cylinder (1) in test fixture
(2) and install two pins (3).
2.
Connect pressure hose (4) to PRESS port (5).
Remove pressure plugs from BRAKE port (6)
and RETURN port (7).
3.
Adjust handle (8) until distance from center of
bearing (9) to center of bearing (10) is 13 inches
(13 inch position).
4.
Check that shutoff valves (11 and 12) are closed.
5.
Hold handle (8) in 13 inch position.
6.
Open shutoff valve (11). Apply 25 psi to PRESS
port (5). Maintain pressure for 3 minutes.
7.
Check cylinder (1) for leaks. There shall be no
external leaks. Internal leaks from ports (6 and
7) shall not exceed 2 drops per minute.
8.
Increase pressure at PRESS port (5) to 4500
psi. Maintain pressure for 3 minutes.
9.
Check cylinder (1) for leaks. There shall be no
external leaks Internal leaks from ports (6 and 7)
shall not exceed 30 drops per minute.
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