TM 1-1520-238-23
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3.67.
MAIN LANDING GEAR WHEEL BRAKE LEAKAGE AND OPERATIONAL TEST (AVIM) – continued
(2) Loosen bleeder screw (4) to allow trapped air
to escape.
(3) Ensure a steady stream of hydraulic fluid is
noted before tightening bleeder screw (4).
(4) Tighten bleeder screw (4).
d. Apply 450 psi to brake assembly (3) for a mini-
mum of 5 MINUTES. Use hose assembly tester.
(1) Check for leaks. None allowed.
(2) Check pistons (5) for binding. None allowed.
e. Inspect (QA).
f. Reduce pressure to 5 psi for a minimum of 5
MINUTES.
(1) Check for leaks. None allowed.
(2) Check pistons (5) for binding after reducing
pressure.
g. Inspect (QA).
h. Release all pressure.
(1) Check disk (6) for free movement. No binding
allowed.
i. Inspect (QA).
j. Apply 450 psi to brake assembly (3) and oper-
ate 25 cycles by applying and releasing pres-
sure. Check for leaks and binding. Use hose
assembly tester.
(1) Check for leakage at moving seals on three
pistons (5). Leakage not to exceed two drops.
(2) Check for binding of three pistons (5). None
allowed.
k. Inspect (QA).
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