Propeller Owner's Manual
175
MAINTENANCE PRACTICES
61-00-75
Page 6-8
Rev. 1
Jun/11
(
8
)
Tighten
the
lubrication
fittings
until snug.
NOTE
: Make sure the ball of each lubrication fitting is
properly seated.
(
9
) Install
a
new lubrication fitting ca
p o
n each lubrication
fitting.
C. Approved Lubricants
(1) The following lubricants are approved for use in Hartzell
compact propellers:
Aeroshell 6 -
Recommended "all purpose"
grease. Used in most new
production propellers since 1989.
Higher leakage/oil separation than
Aeroshell 5 at higher temperatures
(approximately 100°F [38°C]).
Aeroshell 5 -
Good high temperature qualities,
very little oil separation or leakage.
Cannot be used in temperatures
colder than -40°F (-40°C). Aircraft
serviced with this grease must be
placarded to indicate that flight is
prohibited if the outside air
temperature is less than -40°F
(-40°C).
Aeroshell 7 -
Good low temperature grease, but
high leakage/oil separation at higher
temperatures. This grease has been
associated with sporadic problems
involving seal swelling.
Aeroshell 22 -
Qualities similar to Aeroshell 7.
Royco 22CF -
Not widely used. Qualities similar to
Aeroshell 22
(2) A label (Figure 6-2) indicating the type of grease used for
previous lubrication (if used) is installed on the propeller
piston or on the blade clamp. If the propeller is to be
lubricated with a different type of grease, the propeller
must be disassembled and cleaned of old grease before
relubricating.
OBSOLETE PROPELLER MODELS. SEE COVER PAGE
WARNINGS AND SERVICE BULLETIN HC-SB-61-331
