INSTALL HORIZONTAL HINGE PIN OIL SEALS
Do not contaminate horizontal hinge
pin bearings. Bearings can be
Procedure is same to install any
horizontal hinge pin oil seal. There
are six horizontal hinge pin seals on
rotary-wing head. Installation of seals
on forward head is shown here.
Adhesive (E63.1) or sealant (E340.3)
authorized specifically for the
installation of the horizontal hinge pin
Clean seal seat areas (1) on leading and trailing
lugs (2 and 3). Use cloth (E120) damp with
dry cleaning solvent (E162). Do not wash
contaminants into bearings (4). Wear gloves
Clean seals (5). Use cloth (E120) damp with
solvent (E162). Wear gloves (E186).
Check seal lips (6) for nicks or scratches.
All sealants and adhesives have
different cure times. When using
sealants and adhesives, the directions
on the container are to be considered
minimum cure time before full
operation of the aircraft.
Apply thin, even coat of adhesive (E63.1) or
sealant (E340.3) to seal seats (1) and metal
outside diameter of seals (5). Wear gloves
Install bearing and seal pusher (T6) (7) on trailing
lug (3) as follows:
Install seal pilot (8) on bolt (9).
Position seal (5) on bearing and seal pilot
(10) with seal lips (6) facing away from pilot.
Position bearing and seal pilot (10) and seal
(5), on inboard side of lug (3).
Install bolt (9) in bearing and seal pilot (10).