TM 1-1520-238-23
5-174
Change 2
5.37.
MAIN ROTOR FEATHERING BEARING HOUSING REMOVAL/INSTALLATION – continued
5.37.3. Removal
a. Remove feathering bearing housing (1) from
main rotor hub (2).
(1) Remove sealing compound from the attach-
ing hardware. Use spatula set.
(2) Remove nut (3) and washer (4). Use
telescoping handle, adapter, and socket.
(3) Pull housing (1) clear of stud (5).
b. Remove flooring plate (6).
5.37.4. Cleaning
a. Wipe removed and attaching parts with a
clean rag.
b. Clean sealing compound and corrosion pre-
ventative compound from removed and at-
taching parts. Use methyl ethyl ketone
(item 124, App F).
5.37.5. Inspection
a. Check feathering bearing housing, hub, and
stud for cracks and thread damage. None al-
lowed.
(1) Dent and scoring on housing up to 0.063
INCH must be blended.
b. Check feathering bearing housing, hub, and
stud for corrosion (para 1.49).
(1) If light corrosion is present on more than 25
percent of housing surface area, replace
housing.
c. Check feather bearing elastomeric for dam-
age (para 5.1).
d. Check hub and flooring plate for scratches,
nicks, gouges, dents, and grooving not to ex-
ceed 0.010 INCH.
(1) Scratches are acceptable if no material is
raised above the surrounding surface.
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M04-240-1
