TM 55-1520-240-23-6
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EXTENSIBLE LINK ACTUATOR CYLINDER FUNCTIONAL TEST (AVIM)
(Continued)
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TEST 8
EXTERNAL LEAKAGE TEST
117.
Perform steps 1 thru 35. Check initial control and
valve settings in steps 20 and 21.
118.
Set LINK TEST switch (29) to SELF FDBK.
119.
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 PRESS REGULATOR
valve (49) towards INCREASE until HIGH
PRESS gage (51) indicates 1500 psi.
g.
Slowly turn HIGH PRESS SHUTOFF valve
(48) to OPEN.
120.
Set FUNCTION SELECT switch (21) to SQ
WAVE.
121.
Turn SQ WAVE control (27) towards MAX until
piston (9) moves about 5/16 inch. Allow piston
to cycle for 15 minutes.
122.
Check static seals for leaks. There shall be no
leaks.
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