TM 55-1520-240-23-6
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EXTENSIBLE LINK ACTUATOR CYLINDER FUNCTIONAL TEST (AVIM)
(Continued)
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TEST 7
CENTERING SPRING TEST
103.
Perform steps 1 thru 35. Check initial control and
valve settings step 20 and 21.
104.
Set LINK TEST switch (29) to SELF FDBK.
105.
Set electrical and hydraulic unit controls as
follows:
a.
Check RETURN SHUTOFF valve (38) is
OPEN.
b.
SOLENOID valve (50) to OPENED.
c.
SOLENOID SHUTOFF switch (35) to OPEN.
d.
RETURN SYS 1 valve (42) to RETURN.
e.
Slowly turn HIGH PRESS regulator valve
(49) towards INCREASE until HIGH PRESS
gage (51) indicates 1500 psi.
f.
Slowly turn HIGH PRESS SHUTOFF valve
(48) to OPEN.
106.
Set VALVE CONTROL (25) to EXTEND.
107.
AFCS PRESS SYS 1 valve (44) to PRESS.
108.
Set AFCS PRESS SYS 1 valve (44) to OFF.
Piston (9) shall return to center position within 1
second. Record reading on DVM (55).
109.
Repeat steps 107 and 108 three times.
Compare recorded readings with first reading.
Readings shall be within 0.050 of first reading
of step 108.
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