TM 55-1520-240-23-6
7-97
EXTENSIBLE LINK ACTUATOR CYLINDER FUNCTIONAL TEST (AVIM)
(Continued)
7-97
TEST 6
RETURN PROOF PRESSURE TEST
90.
Perform steps 1 thru 35. Check initial control and
valve settings in steps 20 and 21.
91.
Set LINK TEST switch (29) to SELF FDBK.
92.
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) toward INCREASE until HIGH
PRESS gage (51) indicates 1000 psi.
g.
Slowly turn HIGH PRESS SHUTOFF valve
(48) to OPEN.
93.
Slowly turn RETURN SHUTOFF valve (38)
toward CLOSE. At the same time, keep turning
VALVE CONTROL (25) between EXTEND and
RETRACT. Piston (9) will stop when RETURN
SHUTOFF valve is fully closed.
94.
Allow piston (9) to remain in this condition for 5
minutes; then turn RETURN SHUTOFF valve
(38) to OPEN.
95.
Set HIGH PRESS SHUTOFF valve (48) to
CLOSE.
7-393
