Propeller Owner’s Manual
139
MAINTENANCE PRACTICES
61-00-39
Page 6-8
Rev. 17 Apr/20
(2) Owners of high use aircraft may wish to extend their
lubrication intervals. The lubrication interval may be
gradually extended after evaluating bearing wear and
internal corrosion when the propeller is overhauled.
(3) New or newly overhauled propellers should be lubricated
after the first one or two hours of operatio
n because
centrifugal loads will pack and redistribute grease which
can result in a propeller imbalance. Redistribution of
grease may also result in voids in the blade bearing area
where moisture can collect.
(a) Purchasers of new aircraft should check the
propeller logbook to verify whether the propeller was
lubricated by the manufacturer during flight testing.
If it was not lubricated, the propeller should be
serviced at the earliest convenience.
B. Lubrication Procedure
WARNING:
FOLLOW LUBRICATION PROCEDURES
CORRECTLY TO MAINTAIN ACCURATE
BALANCE OF THE PROPELLER
ASSEMBLY.
(1) Remove the propeller spinner.
(2) R
emove both lubrication fitting caps and one of the
lubrication fittings from each blade clamp.
NOTE:
Each blade clamp has two lubrication fittings.
CAUTION:
USE CARE NOT TO DAMAGE THE
THREADED HOLE WHEN REMOVING A
BLOCKAGE.
(3) If there is blockage in the threaded hole where the
lubrication fitting was removed
(ex. hardened grease),
bend a piece of safety wire and use the bent end to
loosen the blockage.