TM 1-1520-238-23
Change 2
3-243
3.61.
PARKING BRAKE ROTARY DIRECT VALVE REPAIR AND TEST (AVIM) – continued
3.61.6. Testing
NOTE
Slight wetting at seals or signs of hydrau-
lic fluid insufficient to form a drop in 5
MINUTES is normal.
a. Test for leaks.
(1) Cap outlet ports and bleeder ports. Set lever
(11) to unparked position. Apply 840 psi to
both inlet ports for 5 MINUTES.
(2) Check for leaks. None allowed. Reduce pres-
sure to zero.
(3) Close inlet port and set lever (11) in parked
position. Apply 400 psi to both outlet ports for
5 MINUTES.
(4) Check for leaks. None allowed. Reduce pres-
sure to zero.
b. Perform handle load test.
(1) Set lever (11) in parked position. Apply 840
psi to both outlet ports.
(2) Apply 15 INCH-POUNDS to lever (11). Use
scale.
(3) Apply 130 psi to inlet port nearest to lever
(11). Leave other inlet port unpressurized.
(4) Apply 130 psi to unpressurized inlet port. Le-
ver (11) must move to unparked position
when pressure is applied.
END OF TASK
PARKE
D
11
70º
UNPARKE
D
M04,3081,
14
UNPARKE
D
PARKE
D
11
70º
M04,3081,1
6
11
OUTLET
PORT
INLET
PORT
M04-3081-17
