INSTALL ROTARY-WING BLADE
Lower vertical pin nut must be
installed and torqued before upper nut
is installed. Installing upper nut first
can cause damage to pin.
Install lower vertical pin nut (20) as follows:
Position pitot socket (21) on drive bar (22).
Position drive bar through vertical pin (18).
Have helper support drive bar (22).
Install torque wrench (T23) (23) on drive bar
(22). Turn handle (24) in either direction until
wrench is seated on pitot socket (21).
Install washer (25) and nut (26) on drive bar
(22). Have helper release bar.
Install lower nut (20) on pin (18) and
Install spanner socket (27), on drive bar (22),
and engage with lower pin nut (20). Install
washer (25) and nut (26).
Adjust upper and lower nuts (26) until drive
bar (22) is seated in spanner socket (27).
Torque wrench (T23) must not turn
during installation of lower nut.
Equipment can be damaged.
Turn handle (24) counterclockwise. Torque
lower nut (20) to 275 foot-pounds. Check
gap between inner bearing race (15) and
liner (27.1) of blade (4). Gap shall not extend
more than 50 percent of contact surface.
No limit on gap depth.
Remove nut (26), washer (25), and spanner