TM 55-1520-240-23-6
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TEST BRAKE MASTER CYLINDER (AVIM)
(Continued)
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19.
Reduce pressure at BRAKE port (6) to 10 psi.
20.
Hold handle (8) and remove thumb screw (14).
21.
Position container (15) under RETURN port (7).
22.
Release handle (8) and check RETURN port (7).
When cylinder (1) extends to 13 inch position,
hydraulic fluid shall flow from RETURN port.
23.
Close shutoff valve (11) to reduce pressure to 0
psi.
24.
Disconnect hose (4) from BRAKE port (6).
25.
Install pressure plugs in ports (5 and 6).
26.
Connect hose (4) to RETURN port (7).
27.
Adjust handle (8) until distance from center of
rod end bearing (9) to center of bearing (10) is
11.5 inches (11.5 inch position). Tighten thumb
screw (14).
28.
Open shutoff valve (11) and apply 25 psi to
RETURN port (7). Maintain pressure for 2
minutes.
29.
Check cylinder (1) for leaks. There shall be no
external leaks.
30.
Increase pressure to RETURN port (7) to 1950
psi. Maintain pressure for 2 minutes.
31.
Check cylinder (1) for leaks. There shall be no
external leaks.
32.
Close shutoff valve (11) to reduce pressure to 0
psi.
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