TM 55-1520-240-23-9
11-267
INSTALL PYLON RIGHT UPPER BELLCRANK
(Continued)
11-267
NOTE
All bolts installed in flight control
system are self-retaining (impedance)
bolts. During installation of flight
controls, make sure all bolts used are
self-retaining bolts.
1.
Position bellcrank (1) in support (2), short arm (3)
up and forward. Install bolt (4) through hole (5),
two washers (6 and 7), and nut (8). Remove tag.
2.
Torque nut (8) to 80 to 125 inch-pounds. Align
cotter pin hole.
3.
Check bellcrank (1) as follows:
a.
Apply force to end of arm (3). Use dial
indicating scale (9). Bellcrank must rotate
with force less than 3 pound and bolt (4)
must not turn. If bolt turns, go to step b. If
bolt does not turn, go to step 4.
b.
Back off nut (8) until bolt does not turn when
bellcrank is rotated. Check cotter pin hole
is aligned.
c.
Check that torque on nut (8) is more than 80
inch-pounds with cotter pin hole aligned.
d.
Repeat step a.
4.
Install cotter pin (10).
5.
Install plug (11) in hole (5).
INSPECT
NOTE
The adjustable rod ends should be
aft or up.
6.
Untie connecting link (12). Position link in short
arm (3) of bellcrank (1). Install bolt (13), two
washers (14 and 15), and nut (16).
7.
Torque nut (16) to 60 to 90 inch-pounds. Install
cotter pin (17).
8.
Position connecting link (18) In bellcrank (1).
Install bolt (19), two washers (20 and 21), and
nut (22). Remove tag.
9.
Torque nut (22) to 30 to 60 inch-pounds. Install
cotter pin (23).
10.
Check two bolts (13 and 19). Bolts shall not
rotate with torque less than 10 inch-pounds.
There shall be no axial looseness. If bolt rotates
or is loose, add washer under nut, and repeat
step 7 or 9.
NOTE
If the connecting links are changed
in length, perform neutral rig check
(Task 11-33).
INSPECT
FOLLOW-ON MAINTENANCE:
Connect servocylinder connecting links (Task
11-193).
Remove safety blocks (Task 11-29).
Close pylon left work platform (Task 2-2).
Close cargo ramp (Task 2-2).
END OF TASK
11-1010
