TM 55-1520-240-23-10
16-29
FORWARD OR AFT CARGO HOOK FUNCTIONAL TEST (AVIM)
(Continued)
16-29
18.
Connect 20-pound load (10) to load beam (11).
Load shall be straight down and centered on
beam.
19.
Raise hoist (1) until load (10) clears ground.
20.
Attach dial indicating scale (14) to lockwire (7).
21.
Pull scale (14) to release load (10). Check force
required to release load. Force shall not exceed
25 pounds. Load beam (11) shall release load
and return to closed and latched position.
a.
If load does not release, or force exceeds 25
pounds, check internal tip of load beam (11)
for damage (Task 16-24, step 44.4).
b.
If load beam (11) does not close and latch,
release lockwire (7). Repeat step 21, pulling
scale (14) more slowly. If beam still does not
close and latch, reject hook.
22.
Remove dial indicating scale (14).
23.
Lower hoist (1).
24.
Connect test setup (15) to connector plug (16),
pins H (+) and E.
25.
Connect 20-pound load (10) to load beam (11).
Load shall be straight down and centered on
beam.
26.
Raise hoist (1) until load (10) clears ground.
27.
Adjust power supply (17) to 22 volts.
28.
Press test switch (18). Load beam (11) shall
release 20-pound load (10) and return to closed
and latched position.
a.
If load (10) does not release, repair solenoid
wiring or replace solenoid (Task 16-24, step
54).
b.
If load beam (11) does not close and latch,
release test switch (18) and repeat step 28.
If beam still does not close and latch, reject
hook.
29.
Release test switch (18).
30.
Disconnect test setup (15) from connector plug
(16).
31.
Cycle keeper (19). Make sure keeper is
spring-loaded down.
16-165
