TM 55-1520-240-23-6
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EXTENSIBLE LINK ACTUATOR CYLINDER FUNCTIONAL TEST (AVIM)
(Continued)
7-97
72.
Set FUNCTION SELECT switch (21) to HARD
OVER EXTEND then BALANCE. Check dial
indicator (3) for piston (9) movement. There shall
be no movement and indicator shall indicate 1
inch. An overshoot of 0.002 to 0.005 inch is
allowed, but piston shall stop within 1 second.
73.
Set FUNCTION SELECT switch (21) to CLSD
LOOP.
74.
Set electrical and hydraulic unit controls as
follows:
a.
HIGH PRESS REGULATOR valve (49) to
DECREASE.
b.
HIGH PRESS SHUTOFF valve (48) to
CLOSE.
c.
SOLENOID SHUTOFF switch (35) to
CLOSED.
d.
SOLENOID valve (50) to CLOSED.
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.
75.
Set LINK TEST switch (29) to VALVE.
76.
Remove dial indicator (3). Stow in cover.
77.
If no further testing is required, perform normal
shutdown (TM 55-4920-428-13).
END OF STABILITY TEST
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