PITCH LINK BOLT TORQUE CHECK
Torque on nuts at upper and lower
bolts is checked in the same way for
all pitch links.
Inspect pitch link (1) for looseness or damage
caused by chafing. Inspect bearing (2) at each
end of link for liner unbonding and signs of
seizing. If a crack in the pitch link is suspected,
refer to TM 1-1520-253-23.
Remove cotter pin (3) at each end of link (1).
Apply 400 inch-pounds torque to nuts (4 and 5)
in the tightening direction.
The nuts should not move.
If nuts (4 and 5) did not move during torque
check, install a new cotter pin (3). Go to
If nuts (4 or 5) moved during torque check,
remove nut, washer (6 or 7), and bolt (8 or 9)
Inspect bolt (8 or 9) for obvious wear. If bushing
has damage, it may be reworked (Task 1-14).
If shank of bolt has scratches or other damage
0.005 inch deep or more, or has a wear step of
0.005 inch or more, replace bolt (Task 5-94.1).
Have helpers lift and twist blade (10) as
required to install bolt (8 or 9). Keep blade
Install new bolt (8 or 9), washer (6 or 7),
and new nut (4 or 5). Check that limiter
is installed. Torque nut to 400 to 660
inch-pounds. Install cotter pin (3).
Have helpers lower rotary-wing blade (10).
END OF TASK