TM 55-1520-240-23-6
7-97
EXTENSIBLE LINK ACTUATOR CYLINDER FUNCTIONAL TEST (AVIM)
(Continued)
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28.
Tighten bleed port (52). Use cloths (E135) for
spilled fluid.
29.
Set LINK TEST switch (29) to SELF FDBK.
30.
Slowly turn HIGH PRESS REGULATOR valve
(49) towards INCREASE until HIGH PRESS
gage (51) indicates 750 psi.
31.
Open HIGH PRESS SHUTOFF valve (48).
32.
Turn VALVE CONTROL (25) to RETRACT, then
NULL, then EXTEND, and then back to NULL
three times.
33.
Set electrical and hydraulic unit controls as
follows:
a.
Turn HIGH PRESS REGULATOR valve (49)
to full DECREASE.
b.
HIGH PRESS SHUTOFF valve (48) to
CLOSE.
c.
SOLENOID valve (50) to CLOSED.
d.
SOLENOID SHUTOFF switch (35) to CLOSE.
e.
AFCS PRESS SYS 1 valve (44) to VENT.
f.
Push and hold HIGH PRESS RELIEF valve
(53) and LOW PRESS RELIEF valve (54)
for 15 seconds.
g.
AFCS PRESS SYS 1 valve (44) to OFF.
h.
RETURN SYS 1 valve (42) to OFF.
34.
Set LINK TEST switch (29) to VALVE.
35.
Lockwire bleed port (52). Use lockwire (E231).
INSPECT
END OF PRELIMINARY PROCEDURES
FOLLOW-ON MAINTENANCE:
Perform test 1 thru 9 as required.
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