TM 55-1520-240-23-4
5-94.1
REPLACE PITCH LINK BOLTS
(Continued)
5-94.1
REPLACE LOWER BOLT
2.
Remove cotter pin (4), nut (5), and washer (6)
from bolt (7) in swashplate (8). Do not remove
the bolt at this time.
NOTE
Do not lubricate thread.
3.
Apply antiseize (E75) to sleeve (9) and shank
(10) of new bolt (7). Wear gloves (E186.1).
4.
Have helpers lift blade (1) to permit removal of
bolt (7). Remove bolt and limiter (11).
5.
Check that bushings (12 and 13) remain installed.
Install new bolts (7), head toward direction of
rotation, and limiter (11). Bolt head (7) does not
face direction of rotation on forward rotor head.
6.
On helicopters with 46 and without 63 check
that serrations on bearing (14) engage serrations
on bushing (13).
7.
Install washer (6) and nut (5) on bolt (7). Torque
nut to 400 to 660 inch-pounds. Install cotter
pin (4). Lower blade (1).
REPLACE UPPER BOLT
8.
Remove cotter pin (15), nut (16), and washer
(17) from bolt (18) in the pocket of pitch arm (19).
Do not remove the bolt at this time.
NOTE
Do not lubricate thread.
9.
Apply antiseize compound (E75) to sleeve (20)
and shank (21) of new bolt (18). Wear gloves
(E186.1).
10.
Have helpers lift blade (1) to permit removal of
bolt (18). Remove the bolt.
11.
Install new bolt (18), with head outboard, and
limiter (22). Check that bushings (23 and 24)
remain installed.
12.
Install washer (17) and nut (16) on bolt (18).
Torque the nut to 400 to 660 inch-pounds.
Lower blade (1). Install cotter pin (15).
INSPECT
FOLLOW-ON MAINTENANCE:
Remove safety blocks at servocylinders (Task 11-29).
Remove electrical power.
Remove hydraulic power.
Close work platforms (Task 2-2).
Remove tiedown lines from blades (Task 1-26).
END OF TASK
5-572
