Hartzell HC-B3-2 Series Owner's Manual And Logbook page 230

(5) If different grease types are accidentally mixed, the
propeller must be disassembled and cleaned in
accordance with the applicable overhaul/maintenance
manual within three months or 30 flights whichever
occurs first.
(a) EXCEPTION: Aeroshell 5 and Aeroshell 6 greases
both have a mineral oil base and the same
thickening agent; therefore, mixing of these two
greases is permitted in Hartzell propellers.
WARNING:
CAUTION 1:
CAUTION 2:
CAUTION 3:
CAUTION 4:
MAINTENANCE PRACTICES
Propeller Owner's Manual
WHEN MIXING AEROSHELL 5 AND
AEROSHELL 6 GREASES, THE
AIRCRAFT MUST BE PLACARDED
TO INDICATE THAT FLIGHT IS
PROHIBITED IF THE OUTSIDE AIR
TEMPERATURE IS LESS THAN -40° F
(-40° C). AEROSHELL 5 GREASE
MUST BE INDICATED ON THE LABEL.
IF A PNEUMATIC GREASE GUN IS USED,
EXTRA CARE MUST BE TAKEN TO AVOID
EXCESSIVE PRESSURE BUILDUP.
GREASE MUST BE APPLIED TO ALL
BLADES OF A PROPELLER ASSEMBLY AT
THE TIME OF LUBRICATION.
DO NOT ATTEMPT TO PUMP MORE THAN
1 FL. OZ. (30 ML) OF GREASE INTO THE
LUBRICATION FITTING. USING MORE
THAN 1 FL. OZ. (30 ML) OF GREASE
COULD RESULT IN OVER SERVICING
OF THE PROPELLER. VERIFY THE
OUTPUT OF THE GREASE GUN BEFORE
SERVICING THE PROPELLER.
OVER LUBRICATING A STEEL HUB
PROPELLER MAY CAUSE THE GREASE
TO DISLODGE THE CLAMP GASKET
OR SEAL, LEADING TO A POTENTIAL
GREASE LEAK. THE CLAMP MUST THEN
BE DISASSEMBLED TO REMOVE THE
SEAL OR CLAMP GASKET.
139
61-00-39
Rev. 17 Apr/20
Page 6-10