ROTARY-WING HEAD RETAINING NUT TORQUE CHECK
Torque must be applied to hub nut as
described. Wrong torque can result in
loss of helicopter and loss of life.
Do not use power tools to turn torque
applicator. Applicator could be
Gage on torque applicator (T2) is
direct reading and shows actual
torque applied to nut. Allowable torque
range for tang washer alignment is
5500 to 6000 foot-pounds.
Have helper turn handle (T161) (18) clockwise.
Observe gage (20) on torque applicator (T2)
(19). Turn handle until gage indicates 5500 to
6000 foot-pounds. Apply torque slowly as gage
reading approaches 5500 foot-pounds.
If handle is turned past indication of 0
foot-pounds, torque on hub nut may
be reduced. Loss of helicopter and
loss of life can result.
Have helper turn handle (18) counterclockwise
until gage (20) on torque applicator (T2) (19)
indicates 0 foot-pounds. Do not continue
Try to rock applicator (T2) (19). If applicator
rocks, go to step 11. If applicator cannot be
moved, continue to turn handle (T161) (18) until
torque forces are relieved.