TM 1-1520-238-23
Change 4
5-53
5.9.
MAIN ROTOR BLADE BALANCE WEIGHT REMOVAL/INSTALLATION – continued
5.9.3. Removal
NOTE
Weights are added or subtracted to
balance main rotor. A maximum of
nine may be installed.
Additional washers may have been
used to prevent nuts from shanking
out on studs.
a. Remove two nuts (1) and washers (2) from
studs (3).
b. Remove weights (4) from bracket (5).
5.9.4. Cleaning
a. Wipe bracket. Use cloth (item 52, App F).
5.9.5. Inspection
a. Check bracket for cracks and studs for
stripped threads. None allowed.
b. Check bracket and weights for corrosion (para
1.49).
5.9.6. Installation
NOTE
Additional washers may be added to pre-
vent nuts from shanking out on studs.
a. Install weights (4), two washers (2), and nuts
(1). Torque nuts (1) to 100 INCH-POUNDS.
(1) Install weights (4) on studs (3). Use
counterbalance weight (item 215, App F)
and/or counterbalance weight (item 216,
App F).
(2) Install two washers (2) and nuts (1) on studs
(3).
(3) Torque nuts (1) to 100 INCH-POUNDS. Use
torque wrench.
b. Inspect (QA).
c. Perform main rotor track and balance mainte-
nance operational check (TM 1-1520-238-T).
END OF TASK
M04-3048-2
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M04-3048-3
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