TM 1-1520-238-23
Change 4
1-276.1
1.86.
HOISTING – MAIN ROTOR HEAD INSTALLATION – continued
c. Insert hook (5) into lifting eye (10).
(1) Crank winch (11) to position hook (5) below
eye (10).
(2) Snap hook (5) into eye (10).
(3) Crank winch (11) to remove cable slack.
NOTE
Use tag lines to control rotor head.
d. Tie two 15-foot tag lines to opposite ends of
rotor head.
e. Lift head (2).
(1) Crank winch (11) to hoist head (2) higher than
top of static mast (12).
f. Position head (2) over static mast (12).
(1) Rotate handle (6) to the up position to allow
lateral movement of boom arm (7).
(2) Use two tag lines (8) to move boom arm (7).
Turn boom arm (7) to aline head (2) over
mast (12).
(3) Rotate handle (6) to the down position to pre-
vent lateral movement of boom arm (7).
g. Lower head (2) to mast (12).
(1) Crank winch (11) and slowly lower head (2) to
mast.
h. Remove bearing retainer (1) from head (2).
(1) Loosen nut (4).
(2) Disengage quick coupler (3). Open retainer
(1).
(3) Remove retainer (1) from bottom groove of
head (2).
i. Release tension on lifting cable.
(1) Crank winch (11) to provide cable slack below
eye (10).
j. Retract hook (5).
(1) Unsnap hook (5) from eye (10).
(2) Crank winch (11) to position hook (5) about 6
inches below boom sheave (13).
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M04-2243-2A
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M04-2243-4
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