TM 9-2320-272-10
3-11.
WHEELS AND TIRES (Contd)
(c)
Hook chain fall (6) to davit boom roller (3) and to utility chain (7) securing spare tire (11) and take up
slack.
(d)
Remove lock pin (14) from davit boom (2), roller (3) and retaining pin (4) from davit boom (2) and davit
support (5).
(e)
Slide out davit boom (2) until holes in davit boom (2) and davit support (5) are aligned. Secure in place
with retaining pin (4) and lock pin (14).
(f)
Hook chain fall (6) to ring (13) on utility chain (7). Pull hand chain (12) to take up slack.
(g)
Loosen wingnut (15) securing wheel brace (10) to threaded bar (9).
(h)
Guide threaded bar (9) from notch in davit boom base (8). Lift wheel brace (10) and threaded bar (9)
from davit boom base (8).
WARNING
•
Stand clear during hoisting operations. Injury may result if personnel are struck by a swinging spare
tire.
•
Use caution when operating chain hoist. Injury may result if fingers are caught in chain hoist pulley
sheave.
(i)
Pull hand chain (12) to slightly raise spare tire (11). Slide spare tire (11) along davit boom (2) until roller
(3) hits stop (1).
NOTE
Spare tire must be turned flat to vehicle body during lowering operation.
(j)
Pull hand chain (12) to lower spare tire (11) to ground.
(k)
Remove utility chain (7) from spare tire (11) and chain fall (6).
(2)
Installation (M923/A1/A2, M925/A1/A2, M927/A1/A2, M928/A1/A2, M931/A1/A2, and M932/A1/A2).
(a)
Place utility chain (7) through rim of spare tire (11) and ring (13) on utility chain (7). Center ring (13) at
top of spare tire. Take up slack and hook utility chain (7) back onto utility chain (7).
(b)
Lower chain fall (6) hook and attach to ring (13).
(c)
Raise spare tire (11) until it clears davit boom base (8).
(d)
Using roller (3), place spare tire (11) in davit boom base (8).
(e)
Lower wheel brace (10), guide threaded bar (9) into notch in davit boom base (8) and tighten wingnut
(15) until snug.
(f)
Remove utility chain (7) from spare tire (11) and chain fall (6).
(g)
Slide davit boom (2) into davit support (5) until holes in davit boom (2) and davit support (5) are aligned.
Secure in place with retaining pin (4) and lock pin (14).
(h)
Return utility chain (7) and chain fall (6) to tool compartment.
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