TM 1-1520-238-23
3-297/(3-298 blank)
3.71.
PARKING BRAKE FUNCTIONAL TEST – continued
(4) Loosen inlet line (10) on parking brake valve
(11). If pressure drops to zero, replace trans-
fer valve (para 3.62). If pressure does not
drop, tighten tube nut (12).
(5) Loosen outlet line (13) to parking brake valve
(11). If pressure drops, replace parking brake
valve (11) (para 3.60). If pressure does not
drop, tighten tube nut (14).
i. If pressure goes to zero but brake does not
release, inspect wheel brake assembly (para
3.66 or 3.65). If required, remove and replace
wheel brake assembly.
j. Perform functional test on pilot right brake.
k. Remove hydraulic tester.
(1) Remove packing (4), adapter (5), pressure
line (6), and hydraulic gage (7) from brake
unit (2).
l. Install bleed screw assembly (1) in main land-
ing gear brake unit (2). Torque to 20 INCH-
POUNDS.
(1) Coat packing (3) with hydraulic fluid. Use
hydraulic fluid (item 92, App F).
(2) Install bleed screw (1) and packing (3) in
brake unit (2).
(3) Torque screw (1) to 20 INCH-POUNDS. Use
torque wrench.
m. Bleed brake system (para 1.45).
n. Inspect (QA).
END OF TASK
13
M04-3844-4
14
12
12
10
14
11
13
11
10
RIGHT SIDE
LEFT SIDE
6
7
4
HYDRAULIC
PRESS. SOURCE
M04-3844-5
2
5
M04-3844-6
2
1
3
