TM 55-1520-240-23-6
7-97
EXTENSIBLE LINK ACTUATOR CYLINDER FUNCTIONAL TEST (AVIM)
(Continued)
7-97
60.
Slowly turn VALVE CONTROL (25) to RETRACT.
Piston (9) shall retract. Read and record
indication on dial indicator (3). Subtract reading
from 1.00 inch. Travel shall be 0.310 to 0.370
inch. AFCS NULL METER (57.1) shall move
to left.
60.1.
Set FUNCTION CONTROL switch (21) to
HARDOVER RETRACT. Record reading on DVM
(55). Reading shall be 1.50 to 1.91.
61.
Set VALVE CONTROL (25) to NULL.
62.
Set electrical and hydraulic unit controls as
follows:
a.
HIGH PRESS REGULATOR valve (49) to
DECREASE.
b.
HIGH PRESS SHUTOFF valve (48) to
CLOSE.
c.
SOLENOID SHUTOFF switch (35) to
CLOSED.
d.
SOLENOID valve (50) to CLOSED.
e.
AFCS PRESS SYS 1 valve (44) to VENT.
f.
Push and hold HIGH PRESS RELIEF VALVE
(53) and LOW PRESS RELIEF valve (54)
for 15 seconds.
g.
AFCS PRESS SYS 1 valve (44) to OFF.
h.
RETURN SYS 1 valve (42) to OFF.
63.
Set LINK TEST switch (29) to VALVE.
64.
If not needed for further testing, remove dial
indicator (3). Stow in cover.
NOTE
Indicator is used in Test 4.
65.
If no further testing is required, perform normal
shutdown (TM 55-4920-428-13).
END OF CYLINDER STROKE TEST
7-388
