TM 1-1520-238-23
Change 4
6-51
6.9.
AFT HANGER BEARING COUPLING REMOVAL/INSTALLATION – continued
CAUTION
When installing hanger bearing coupling,
ensure that bolts are installed through
0.250 INCH bolt holes on coupling for-
ward flange and on aft hanger bearing
input flange. Do not install bolts through
any of 0.500 INCH lightening holes. Instal-
lation of bolts through lightening holes will
result in failure of drive shaft and/or cou-
pling.
b. Install coupling (1). Torque bolts (2) and (5) to
125 INCH-POUNDS.
(1) Position coupling (1) between flange (7) and
shaft (4) with nutplates (14) facing aft. Aline
bolt holes.
(2) Install five bolts (5) through flange (7) and
coupling (1) aft flange (6).
(3) Install five bolts (2) through coupling (1) for-
ward flange (3) and shaft (4).
(4) Torque bolts (2) and (5) to 125 INCH-
POUNDS. Use torque wrench adapter and
torque wrench.
(5) Apply corrosion preventive compound to
bolts (2) and (5). Use corrosion preventive
compound (item 62A, App F).
c. Inspect (QA).
d. Install access fairing R410 (para 2.2).
e. Perform drive system vibration maintenance
operational check (TM 1-1520-238-T).
END OF TASK
M04-0443-4
5
1
2
4
14
7
6
3
