TM 1-1520-238-23
6-80
Change 4
6.13.
INTERMEDIATE GEARBOX OUTPUT COUPLING REMOVAL/INSTALLATION – continued
CAUTION
When installing intermediate gearbox
output coupling ensure that bolts are
installed through 0.250 INCH bolt holes
on the coupling upper flange and on the
intermediate gearbox output flange. Do
not install bolts through any of 0.500
INCH lightening holes. Installation of bolts
through lightening holes will result in fail-
ure of drive shaft and/or coupling.
b. Install coupling (1). Torque bolts (5) and (2) to
125 INCH-POUNDS.
(1) Push down on flange (7).
(2) Position coupling (1) between flange (7) and
shaft (4) with lower flange (6) facing flange
(7). Aline bolt holes.
(3) Install five bolts (5) through flange (7) and
coupling (1) lower flange (6).
(4) Install five bolts (2) through coupling (1) up-
per flange (3) and shaft (4).
(5) Torque bolts (5) and (2) to 125 INCH-
POUNDS. Use torque wrench adapter and
torque wrench.
(6) Apply corrosion preventive compound to
bolts (5) and (2). Use corrosion preventive
compound (item 62A, App F).
c. Inspect (QA).
d. Install access fairings R475, L510, and R510
(para 2.2).
e. Perform drive system vibration maintenance
operational check (TM 1-1520-238-T).
END OF TASK
M04-0451-3
4
7
5
2
1
3
6
