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TM 9-2320-304-14&P
5-251
Direct Support and General Support Maintenance (Cont)
WARNING
Use care when removing retaining rings.
Retaining rings are under tension and can
act as projectiles when released, causing
injury to personnel.
NOTE
·
Shim is 0.0747 in. (1.9 mm) thick.
Add one shim per every 0.0747-in.
(1.9 mm) gap between inside lip and
hook arm.
·
Only add shim if area between
inside lip and hook arm exceeds
0.0747 in. (1.9 mm).
·
Perform steps (138) through (142) if
shim(s) are required.
(137) Measure distance between hook
arm (51) and inside lip of main
frame (178). Record as
measurement “A.”
(138) Soldier A supports hook arm (51) and
Soldier B removes retaining ring (179)
from left side of pivot pin (180).
NOTE
Do not completely remove pivot pin.
(139) Partially remove left-side pivot
pin (180) until shim(s) (181) can be
installed between hook arm (51) and
main frame (178).
(140) Position shim(s) (181), as required,
between inside lip of main frame (178)
and hook arm (51).
(141) Install left-side pivot pin (180) through
shim(s) (181) and inside lip of main
frame (178).
(142) Install retaining ring (179).
(143) Remove lifting device from hook
arm (51).
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