Maintenance Practices
61-00-40
Page 6-9
Rev. 2 Jun/12
Propeller Owner's Manual
140
C. Approved Lubricants
(1) The following lubricants are approved for use in Hartzell
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.
D. A-38( )Thrust Bearing Lubrication
(1) The A-38( ) thrust bearing must be lubricated every 100
hours.
(2) Propeller Models HC-D2(V,MV)20-3 and
HC-D3(V,MV)20-6L contain piston P/N D-78.
(3) Propeller Models HC-D2(V,MV)20-(7,8) and
HC-D3MV20-8D contain piston P/N C-112-2.
CAUTION:
DO NOT OVER LUBRICATE THE A-38( )
THRUST BEARING.
(4) Using approximately one tablespoon full of high speed
bearing grease Hartzell Propeller Inc. P/N A-6741-139-1,
lubricate the A-38( ) thrust bearing in accordance with
Figure 6-3.
Summary of Contents for HC-D2MV20-3 Series
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