TM 55-1520-240-23-6
7-269.1
TEST 145HS775 RAMP CONTROL VALVE (AVIM)
(Continued)
7-269.1
d.
Remove pressure from ramp control valve (2).
e.
Set PWR switch (22) to OFF.
f.
Move ramp control valve handle (16) to
position 2 (stop).
g.
Check internal leakage of ramp control
valve, with handle (16) in position 2 (stop)
as follows:
(1)
Remove cap from port C1 (28) and
pressure line from pressure port P (24).
(2)
Install pressure cap (14) over pressure
port P (24) and connect pressure line (8)
to port C1. Caps (11 and 12) shall remain
on ports C3 and C2, and return port R
(20) shall remain open.
(3)
Apply 3350 psig to pressure line (8) in
port C1, and check leakage from return
port R (20). Leakage rate shall not
exceed 1 dpm.
(4)
Remove pressure from ramp control valve
(2).
(5)
Remove pressure cap from port C2 and
install pressure line (19).
(6)
Install pressure cap (13) on port C1.
(7)
Apply 3350 psig to port C2, and check
leakage from return port R (20). Leakage
rate shall not exceed 1 dpm.
7-1007
