TM 1-1520-238-23
Change 6
5-207
5.46.
MAIN ROTOR LOWER OIL SEAL AND OIL SEAL RETAINER REPLACEMENT (AVIM) – continued
c. Install main rotor lower oil seal retainer (3) in
hub (5).
(1) Position retainer (3), with curved side down,
in hub (5).
(2) Tap retainer (3) in circular direction until re-
tainer is seated in hub (5). Use mallet.
NOTE
Over-packing of the grease cavity be-
tween the lower main rotor head bearing
and the lower oil seal will cause exces-
sive main rotor head grease leakage. If
grease replenishment is required, leave
sufficient space in the grease cavity for
thermal expansion and/or churning of the
grease.
d. Replenish cavity above bearing to top edge of
bearing inner race. Use grease (item 87,
App F).
NOTE
Ensure that seal lip is properly posi-
tioned.
e. Install new main rotor lower oil seal (6) in seal
retainer (3).
(1) Position seal (6) on top of retainer (3) with
curved side up.
(2) Tap seal (6) in circular direction until seal is
seated in retainer (3). Use mallet.
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M04-232-6A
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M04-232-7A
