TM 55-1520-240-23-6
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TEST BRAKE MASTER CYLINDER (AVIM)
(Continued)
7-228
33.
Remove rod (13) and thumb screw (14) from test
fixture (2).
34.
Remove pressure plugs from ports (5 and 6).
35.
Disconnect hose (4) from RETURN port (7).
36.
Connect hose (4) to PRESS port (5).
37.
Connect return hose (16) to BRAKE port (6).
38.
Make sure valve (17) is closed.
39.
Open shutoff valve (11). Apply 4500 psi to
PRESS port (5).
40.
With aid of helper, attach 160 pound weight (18)
to handle (8) of test fixture (2).
41.
Open shutoff valve (17) until bearings (9 and 10)
are 12.25 inch apart. Close shutoff valve (17).
42.
Hold handle (8) in 12.25 inch position for 3
minutes.
43.
Check cylinder (1) for leaks. There shall be no
external leaks
44.
Close shutoff valve (11) to reduce pressure to 0
psi.
45.
With aid of helper, remove 160 pound weight
(18) from handle (8).
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