INSTALLATION AND REMOVAL
61-00-75
Propeller Owner’s Manual
175
Page 3-60
Rev. 1 Jun/11
(13) Safety the hub nut using the hub lock safety pin
(Table 3-1). Refer to Figure 3-14.
(14) If the piston O-ring (Table 3-1) and the felt dust seal are
not already installed in the piston, perform the following
steps. Refer to Figure 3-15.
(a) Lubricate the piston O-ring with
aviation grade
reciprocating
engine oil and carefully install it in the
inner groove provided for it in the piston.
(b) Cut th
e f
elt dust seal material to the necessary
length.
NOTE
: Cut the felt seal material on a 30 degree
diagonal so there will be an overlap with a
smooth, fuzz-free surface.
(c) Soak the felt dust seal material in
aviation grade
reciprocating
engine oil
until it is completely
saturated
.
(d) Squeeze the excess oil from the felt dust seal.
(
e
) Install the felt dust seal material in the outer groove
provided for it in the piston.
Installing Piston O-Ring and Felt Dust Seal
Figure 3-15
Piston
Felt Dust Seal
Piston O-ring
Piston O-ring Groove
Felt Dust Seal Groove
D-1930
OBSOLETE PROPELLER MODELS. SEE COVER PAGE
WARNINGS AND SERVICE BULLETIN HC-SB-61-331
