Removal; Wood Propeller; Propeller Maintenance (Bolt Torque) - Cub Crafters CC11-100 Maintenance Manual

McCauley Metal
Propeller
300-360 in-lbs
(h) Check to make sure the propeller track is within 1/8-inch.
(i) Install 0.041-inch diameter stainless steel safety wire in the propeller bolt heads
locking bolt heads together in a tightening moment. It is recommended that bolts
be wired in pairs, twisting the wire between the bolt heads.

(6) REMOVAL

(a) Be certain that magneto switch is off, and that both magnetos are grounded.
Remove the spinner dome.
(b) Mark the aft bulkhead propeller and spinner with tape, so they are reinstalled in
the same orientation.
(c) Remove safety wire on propeller mounting bolts.
(d) Remove the spinner.
(e) Remove the propeller bolts.
(f) Remove the propeller from the flange. A slight rocking may be necessary to
remove the propeller. Be careful during the removal; if the propeller is tight on the
flange it is possible to tear out the back of the hub around the center bore and
bolt hole counterbores.
(g) Assistance may be needed to hold the propeller and spinner backing plate.
2

WOOD PROPELLER

PROPELLER MAINTENANCE (BOLT TORQUE)

(1)
The main factor that leads to the loss of propeller bolt torque is the variation of the
wood hub thickness. The hub thickness will vary with wood moisture content
changes and temperature changes. Even though your propeller has been sealed
and/or painted, changes in wood moisture content can occur and can significantly
change the thickness of the hub. A one percent (1%) change in the moisture content
of a propeller (increase / decrease) will cause a 0.010" change in hub thickness.
As the required compression for a typical wood propeller is 0.021", almost half of the
required hub compression would be lost with such a change. Moisture content
changes are not immediate and can span several weeks or months, depending on
many factors such as temperature, humidity, and operating schedules. Operating
temperature changes have similar effects but are not as severe.
Manual number SC10000AMM
Date: 08/02/2010
CUB CRAFTERS, INC.
CC11-100 MAINTENANCE MANUAL
Sensenich Wood
Propeller Composite Propeller
175-225 in-lbs
Sensenich Catto Propellers
Wood/Composite
340-360 in-lbs 360 in-lbs
6.3.16
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