TM 1-1520-238-23
Change 3
5-208.9
5.46B.
MAIN ROTOR UPPER BEARING INNER RACE/ROLLERS GREASE REPACKING
(AVIM) – continued
5.46B.6. Servicing
a. Repack main rotor head lower cavity
(TM 55-1500-322-24). Use grease (item 87,
App F).
b. Inspect (QA).
NOTE
A small amount of grease overfill on top
area of bearing roller and cage is accept-
able.
c. Repack upper bearing inner race/rollers and
cage (TM 55-1500-322-24). Use grease
(item 87, App F) and lubricant packer.
d. Inspect (QA).
5.46B.7. Installation
CAUTION
Do not pack grease in upper cavity, as
this will result in damage to bearing.
a. Install upper bearing inner race/rollers (2) on
main rotor head (1).
NOTE
Rotate bearing back and forth to aline
during installation.
(1) Aline and install upper bearing (2) in head (1).
(2) Remove excess grease from top of upper
bearing (2). Use cloth (item 52, App F) and
depressor (item 70, App F).
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M04-5168-5
LOWER CAVITY
UPPER CAVITY
MAIN ROTOR UPPER BEARING
M04-5168-6
2
1
