TM 55-1520-240-23-10
16-7.1.1
TEST CENTER CARGO HOOK (AVIM)
(Continued)
16-7.1.1
EMERGENCY LOAD RELEASE TEST (PNEUMATIC)
10.
Check that actuator air pressure gage (12)
indicates 2,100 psi. Service if needed (Task
1-74).
11.
Attach weight (6) to hook (4).
NOTE
If hook is held open more than several
seconds, air charge will deplete. Hook
will not close.
12.
Momentarily apply 28 vdc from power supply
(13) to pins A and B of connector (10). Hook (4)
shall open within 1 second and weight (6) shall
drop. Multimeter shall indicate 0 ohm.
a.
If hook (4) does not open within 1 second,
replace cylinder (5) (Tasks 16-5 and 16-7
without 35 , 16-5.1 and 16-7.1 with 35 ).
b.
If multimeter (9) does not indicate 0 ohm,
adjust switch S3 (11) (Task 16-7.2).
When power is removed from hook,
oil mixed with air may be vented
from cylinder. Stand away from hook
assembly or injury can occur.
13.
Remove 28 vdc from connector (10). Hook (4)
shall close. Multimeter (9) shall indicate infinity.
a.
If hook (4) does not close, replace cylinder
(5) (Tasks 16-5 and 16-7 without 35 , 16-5.1
and 16-7.1 with 35 ).
b.
If multimeter (9) does not indicate infinity,
replace switch S3 (11) (Tasks 16-5 and 16-7
without 35 , 16-5, and 16-7.1 with 35 ).
16-70
