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 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 (or use a extension bar) of respective specification
(1000 Nm /738 ft.lb.) on the propeller flange.
NOTE
Because of difficult measurement of the slipping torque the break-
away torque is measured.
ATTENTION
Danger of damage to the engine suspension! Depending on the engine installa-
tion (e.g. in the case of extremely lightweight engine suspension), the gearbox
must be removed and the test carried out on a suitable mounting attachment.
05–50–00
Page 12
September 01/2018
Effectivity: 912 i Series
Edition 2/Rev. 0
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