TM 1-1520-238-23
1-305
1.97.
MAINTENANCE CRANE INSTALLATION – continued
WARNING
The crane boom arm weighs 58
pounds and can cause injury to per-
sonnel if allowed to fall. Keep hands
away from area between crane boom
arm and elevation yoke. Keep area
clear of unnecessary personnel. If in-
jury occurs, seek medical aid.
f. Install crane boom arm (10) on mast (21).
(1) Move lift mechanism handle (46) up to unlock
yoke (47).
(2) Swivel yoke (47) so open face is outboard.
(3) Move handle (46) down to lock yoke (47).
(4) Remove two quick-release pins (48) from
yoke (47).
(5) Position pivot end of arm (10) in yoke (47) to
aline boom hole X (49) with yoke hole A (50).
(6) Install one pin (48) through yoke holes A (50)
and boom hole X (49).
(7) Move handle (46) up to unlock yoke (47).
(8) Swing arm (10) forward (inboard) until end of
arm is 1 foot from forward avionics bay (22).
(9) Move handle (46) down to lock yoke (47).
(10) Install two tag lines (8) on crane boom arm
(10).
(11) Have assistant raise crane boom arm (10) to
aline boom hole Y (51) with yoke holes O
(52).
(12) Install remaining pins (48) through yoke holes
O (52) and boom hole Y (51).
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DOWN
UP
M04-1655-16
46
46
21
10
VIEW
ROTATED
VIEW
ROTATED
47
47
50
51
48
10
49
52
M04-1655-17
M04-1655-19
10
8
22
M04-1655-18
48
47
10
52
51
