INSTALL PITCH-VARYING HOUSING (Continued)
Install pitch-varying housing only if it is
the same housing that was removed,
installation of a replacement housing
is not permitted at this level.
Procedure is same to install any
pitch-varying housing on forward or
aft head. Yellow housing on forward
head is shown here.
Remove barrier, material, and tape from pitch
shaft (1). Clean pitch shaft. Use cloth (E120)
damp with solvent (E162). Wear gloves (E186).
Check shaft (1) for scores, nicks, or gouges.
Damage shall not exceed 0.005 inch in depth by
2.5 inches in length. Damage direction in View
A shall not exceed 20
from shaft centerline.
Do not allow dirt or abrasive
materials to contact bearing races.
Avoid handling pitch-varying shaft.
Fingerprints can cause corrosion on
Check that rollers (2) are in cages (3). Apply thin
coat of grease (E190) to hold rollers in place,
Apply light coat of lubricating oil (E254/E254.1)
to shaft (1).
Clean sealant from two holes (4) in pitch housing
(5). Use methyl-ethyl-ketone (E244). Wear
Do not allow seals to contact tie-bar
during pitch housing installation.
Sharp edges of tie-bar can damage
Inspect all inboard and outboard
tie-bar pin assemblies IAW Task 5-6,
steps 2k1 thru 2k7, for serviceability
prior to installation.
Install housing (5) over tie-bar (6) and shaft (1).
Guide seal (7) onto wear sleeve (8). Seal shall
not be folded.
Align hole (9) in tie-bar (6) with hole (4) in
housing (5). Use pitch arm (10) to guide housing.