TM 55-1520-240-23-6
7-98
TEST PITCH, ROLL, YAW, OR THRUST INTEGRATED LOWER CONTROL ACTUATOR
(ILCA) (AVIM) (Continued)
7-98
TEST 16
RELIEF VALVE TEST (ALL)
288.
Perform steps 1 thru 40. Check initial control and
valve settings in steps 22 and 23.
NOTE
If relief valve was not replaced in Test
15, omit step 289.
289.
Remove relief valve (90) of system 2 as follows:
a.
Remove lockwire from valve (90).
b.
Remove valve (90) and packing (91). Use
cloths (E135) for spilled fluid. Wear gloves
(E184.1).
c.
Remove adapter (87) from stowed position
and install it in port (92).
d.
Torque adapter (87) to 17 inch-pounds.
e.
Remove cap (89).
f.
Remove plug (93).
g.
Connect hose (94) to adapter (87).
290.
Set electrical and hydraulic unit controls as
follows:
a.
SOLENOID valve (53) to OPENED.
b.
SOLENOID SHUTOFF switch (44) to OPEN.
c.
Slowly turn CASE VENT LINE PRESS
VALVE (48) to OPEN.
291.
Slowly turn LOW PRESS REGULATOR valve
(50) towards INCREASE until relief valve (85)
cracks and fluid flows from valve. Valve shall
relieve at 160 to 190 psi. Record reading.
292.
Slowly turn LOW PRESS REGULATOR valve
(50) towards DECREASE until flow from valve
(85) stops. Flow shall stop when pressure is
above 150 psi. Record reading.
293.
Repeat steps 291 and 292. Record cracking and
reseating pressures. Compare readings.
Change 1
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