TM 55-1520-240-23-6
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EXTENSIBLE LINK ACTUATOR CYLINDER FUNCTIONAL TEST (AVIM)
(Continued)
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TEST 3
CYLINDER STROKE TEST
54.
Perform steps 1 thru 35. Check initial control and
valve settings in steps 20 and 21.
55.
Remove dial indicator (3) from cover.
56.
Install dial indicator (3) on post (57). Set anvil
of indicator against piston (9). Adjust indicator
to 1 inch.
57.
SET LINK TEST switch (29) to SELF FDBK.
58.
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.
AFCS PRESS SYS 1 valve (44) to PRESS.
f.
Slowly turn HIGH PRESSURE REGULATOR
valve (49) towards INCREASE until HIGH
PRESS gage (51) indicates 1500 psi.
g.
Slowly turn HIGH PRESS SHUTOFF valve
(48) to OPEN.
59.
Turn VALVE CONTROL (25) to EXTEND, Piston
(9) shall extend. Read and record indication (3).
Subtract 1.000 inch from reading. AFCS NULL
METER (57.1) shall move to the right. Travel
shall be 0.310 to 0.370 inch.
59.1.
Set FUNCTION SELECT switch (21) to
HARDOVER EXTEND. Record reading on DVM
(55). Reading shall be 1.50 to 1.91.
59.2.
Set FUNCTION SELECT switch (21) to CLSD
LOOP.
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