TM 55-1520-240-23-4
5-44
REMOVE HORIZONTAL HINGE PIN, PITCH-VARYING HOUSING AND PIN
BEARINGS (Continued)
5-44
CAUTION
Do not install horizontal hinge pins,
thrust washers, or bearings in wrong
lugs. Binding or excessive play can
occur if parts are not installed as
removed. Store parts together with
caps, shim, and trailing washers.
CAUTION
Do not vibro engrave matchmarks on
horizontal hinge pin or bearing.
8.
Matchmark horizontal hinge pin (15) so it can be
replaced in original position or rotated 180 . Use
marking pencil (E271).
9.
Remove lockwire from shoulder bolt (17).
Remove bolt, washer (18), and special nut (19).
CAUTION
Do not handle horizontal hinge pin. Do
not allow dirt or abrasives to contact
pin. Dirt or abrasives can contaminate
pin. Fingerprints can cause corrosion.
10.
Turn jack (20) on horizontal pin pusher (T87) (21)
all the way out.
11.
Install pin pusher (T87) (21) over lugs (22 and
23) as follows:
a.
Position pin pusher (T87) (21) on lugs (22 and
23), with jack (20), on side of leading lug (22).
NOTE
On aft rotary-wing head, leading lug
faces opposite direction.
b.
Turn jack (20) clockwise until washer (24)
is positioned in pin (15), and pad (25) is
centered on pin.
12.
Turn jack (20) to remove pin (15) from lugs (22
and 23).
Change 2
5-189
