BRP-Rotax
MAINTENANCE MANUAL LINE
CHECKING OF THE OVERLOAD CLUTCH
General note
In the event of lead deposits and/or if slipping is suspected, it will be necessary to check
the overload clutch.
NOTE
Slipping of overload clutch is apparent if at engine speed rise, the propeller speed
does not increase at the same rate.
NOTE
The engine should be run for a short time (max. 1 day) prior to the test, otherwise
there is the risk of the clutch “drying out“, resulting in a higher torque.
Step
Procedure
1
Remove the propeller as per manufacturers instruction.
2
Lock the crankshaft.
See
Chapter 12-20-00 section Locking/loosen of the crankshaft
.
3
Install a torque multiplier of respective specification (1000 Nm /737.6 ft.lb.)
on the propeller flange.
NOTE
Because of difficult measurement of the slipping torque the break-
away torque is measured.
Page 12
January 01 2020
Effectivity: 912 Series
Rev. 0
