TM 1-1520-238-23
5-196
5.43.
MAIN ROTOR HEAD ASSEMBLY (AVIM) – continued
CAUTION
Do not continue to tighten nut after PLI
washer no longer turns. Damage will oc-
cur to PLI washer, bolt, and nut. PLI
washer, bolt, and nut must be replaced if
over-torque occurs.
o. Torque eight nuts (15) using PLI washer
torquing method.
(1) Torque nuts in a criss-cross manner until cor-
rect torque is reached.
(2) Hold eight bolts (14).
(3) Insert scriber in hole in outer washer (19).
Use scriber.
(4) Tighten eight nuts (15) 1/8 turn at a time while
turning outer washer (19). Use hinged
handle, adapter, and socket.
NOTE
The correct torque is reached when outer
washer no longer turns.
(5) Continue to tighten eight nuts (15) until all
nuts are correctly torqued.
p. Measure gap between each strap pack leg (22)
and hub plate (11).
(1) Gap must be 0.002 to 0.042 INCH. If any gap
measurement is not between 0.002 and
0.042 INCH, perform disassembly and in-
spection (para 5.42). Use gap setting gage.
q. Inspect (QA).
r. Install main rotor feathering bearing housings
(four places) (para 5.37).
END OF TASK
M04-247-4
1
8
6
4
2
7
5
3
14
19
15
M04-247-7
22
11
0.002 TO 0.042 INCH
