TM 1-1520-238-23
Change 1
6-557
6.135.
TAIL ROTOR GEARBOX INPUT GEAR SEAL ASSEMBLY REMOVAL/INSTALLATION – continued
CAUTION
Ensure pinion gear and bearings do
not fall out of tail rotor gearbox when
retainer is removed. Tail rotor gearbox
must be returned to depot if gear and
bearings fall out.
The seal contains a magnet. Do not
store or handle near metal filings or
chips.
6.135.3. Removal
a. Remove retainer (1) from tail rotor gearbox
(2).
(1) Remove sealing compound from retainer (1)
and gearbox (2).
(2) Remove six self-locking nuts (3) and spacers
or washers (4) from studs (5).
(3) Discard nuts (3).
(4) Remove sealing compound from two nylon
setscrews (6).
(5) Remove two nylon setscrews (6) from retain-
er (1).
(6) Install two jackscrews (7) on retainer (1). Use
jackscrew set.
CAUTION
Jackscrews must be tightened evenly to
avoid damage to gearbox.
(7) Tighten two jackscrews (7) evenly until retain-
er (1) separates from gearbox (2).
(8) Remove retainer (1) from gearbox (2).
(9) Remove two jackscrews (7) from retainer (1).
(10) Remove and discard grease from input drive
cavity of gearbox housing (2).
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