TM 55-1520-240-23-6
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EXTENSIBLE LINK ACTUATOR CYLINDER FUNCTIONAL TEST (AVIM)
(Continued)
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21.
Set hydraulic unit controls as follows:
INITIAL SETTINGS OF HYDRAULIC UNIT CONTROLS
NOTE
RETURN SYS 2 valve, AFCS PRESS
SYS 2 valve, and ILCA PRESS SYS
1 and SYS 2 valves are not used in
these tests. They should, however, be
kept at initial settings.
VALVE IDENTIFICATION
POSITION
REQUIRED
RETURN SHUTOFF VALVE shall be OPEN unless
otherwise specified in a test.
RETURN SHUTOFF valve (38)
Full OPEN
CASE VENT LINE PRESS
valve (39)
Full CLOSE
RETURN BACK PRESS valve
(40)
Full CLOSE
LOW PRESS REGULATOR
valve (41)
Full DECREASE
Both RETURN valves
(42 and 43)
OFF
Both AFCS PRESS valves
(44 and 45)
OFF
Both ILCA PRESS valves
(46 and 47)
OFF
HIGH PRESS SHUTOFF
VALVE (48)
Full CLOSE
HIGH PRESS REGULATOR
valve (49)
Full DECREASE
SOLENOID valve (50)
CLOSED (in)
22.
Apply test stand pressure of 1500 psi.
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