Propeller Owner's Manual
136
TESTING AND TROUBLESHOOTING
61-00-36
Page 4-15
Rev. 2 Feb/17
I. Oil or Grease Leakage
NOTE: A new propeller may leak grease slightly during
the first several hours of operation. This leakage
may be caused by the seating of seals and
O-rings, and the slinging of lubricants used
during assembly. Such leakage should stop
within the first ten hours of operation.
CAUTION:
GREASE LEAKAGE THAT CAN BE
DESCRIBED AS EXCESSIVE AND
APPEARING SUDDENLY, ESPECIALLY
WHEN ACCOMPANIED BY VIBRATION
SHOULD BE INVESTIGATED
IMMEDIATELY BEFORE FURTHER
FLIGHT.
(1) Check:
(a) Improperly torqued or loose lubrication fitting
(b) Defective lubrication fitting
(c) Damaged blade shank to hub O-ring seal
(d) Damaged hub seal (at hub parting line)
(e) Damaged O
-ring at hub/engine flange interface
(f) Cracked hub.
1 A cracked hub is often indicated by grease
emerging from a seemingly solid surface,
especially in the blade arm area
