TM 55-1520-240-23-4
5-84
INSTALL ROTARY-WING BLADE
(Continued)
5-84
8.
Wipe inner bearing races (14 and 15) clean. Use
cloth (E120). Check that races are into lugs (16)
as far as possible.
Do not bump blade into housing or
races. Equipment can be damaged.
9.
Guide blade (4) carefully into lugs (16). Align
blade bore (2) with inner races (14 and 15). Use
guide rope (11) at root of blade (4).
9.1.
Apply antiseize compound (E75 or E76) to thread
of pin (18).
Use extreme care during pin
installation. Vertical pin thread, inner
bearing races, and blade pin bore
lines are easily damaged.
10.
Install protective cap (T70) (17) on end of pin
(18) that does not have identification. Install
shaft (19) in cap (T70). Install pin through upper
bearing race (14). Push pin in until pin has
started into lower race (15).
11.
Seat pin (18) by tapping. Use rawhide mallet.
Remove cap (T-70) (17).
Using vertical pin nuts with damaged
thread will damage thread on the
vertical pin, causing rejection of pin.
11.1.
Inspect lower and upper vertical pin nuts (20 and
20.1) for damaged, distorted, or poorly machined
thread.
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