Page 4-14
Rev. 1 Jun/11
TESTING AND TROUBLESHOOTING
61-00-75
Propeller Owner's Manual
175
(c) Governor oil pressure low - HC-8( )( )( )-1( )( ),
-2( )( ), and -3( )( ) propeller models.
(d) Governor oil passage clogged.
(e) Governor pilot valve jammed - HC-8( )( )( )-1( )( ),
-2( )( ), and -3( )( ) propeller models.
N
. Oil or Grease Leakage
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) Grease Leakage - Probable Cause:
NOTE:
The blade clamp is the only source of grease
leakage.
(a) Improperly torqued or loose lubrication fitting.
Tighten the fitting.
(b) Defective lubrication fitting.
Replace the fitting.
(c) Incorrect O-ring between the blade clamp and the
propeller hub.
Refer to an appropriately licensed propeller repair
facility for replacement of the O-ring.
(d) Grease leaks past the blade clamp seal gaskets.
Replace the gaskets.
(e) Grease leaks from between the blade clamp and the
blade.
Refer to an appropriately licensed propeller repair
facility for replacement of sealant.
(f) Grease leaks from the clamp in a static condition
when the blade is pointed up. - Improper application
of silicone sealant on the clamp radius of the
bearing-to-clamp interface.
Refer to an appropriately licensed propeller repair
facility for reapplication of silicone sealant.
OBSOLETE PROPELLER MODELS. SEE COVER PAGE
WARNINGS AND SERVICE BULLETIN HC-SB-61-331
