TM 55-1520-240-23-6
7-97
EXTENSIBLE LINK ACTUATOR CYLINDER FUNCTIONAL TEST (AVIM)
(Continued)
7-97
110.
Set VALVE CONTROL (25) to RETRACT.
111.
Set AFCS PRESS SYS 1 valve (44) to PRESS.
112.
Set AFCS PRESS SYS 1 valve (44) to OFF.
Piston (9) shall return to center position within 1
second. Record reading on DVM (55).
113.
Repeat steps 111 and 112 three times.
Compare recorded readings with first reading
of step 112. Readings shall be within 0.050 of
first reading.
114.
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 CLOSE.
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.
115.
Set electrical unit controls as follows:
a.
VALVE CONTROL (25) to NULL.
b.
LINK TEST switch (29) to VALVE.
116.
If no further testing is required, perform normal
shutdown (TM 55-4926-428-13).
END OF CENTERING SPRING TEST
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