REMOVE ROTARY-WING HEAD (Continued)
17.1. Install lifting device (T30) (41) as follows:
Position lifting device (T30) (41) on head (1).
Turn three arms (43) inward under top flange
(43.5) of head (1). Make sure each arm
points to the center of device (41) within 20 .
Make sure each arm engages flange (43.5)
at least 1/4 inch.
Install three pins (42).
Do not use wrench to tighten nuts.
Lifting device (T28) can be damaged.
Hand tighten three nuts (44).
Attach two rope guide lines (45) around pitch
housing (5). Attach hoist (46) to lifting device
Head weighs 700 pounds (1,750
pounds with blades attached) and
can injure personnel if it drops. Head
must be supported by hoist and
moved carefully to prevent injury.
If rotor blades are installed, use
special care to prevent blades from
uncontrolled swinging. Station
personnel at tiedown lines of all
blades. Attempting to remove head
without securing blades can result in
injury to personnel and damage to
Lift and lower head slowly and
carefully to prevent damage to splines,
thread, and surfaces.
Lift head (1). Use hoist (46).
If rotor blades are not installed, position head
(1) on handling adapter (T13) (47). Have helper
Remove three pins (42). Loosen three nuts (44)
and turn three arms (43) outward. Remove lifting
device (T30) (41).