BRP-Rotax
MAINTENANCE MANUAL LINE
Step
Procedure
4
Attach and adjust outrigger of the torque multiplier. If the engine is mounted
in an aircraft, this one must be supported/fixed to the ground.
NOTE
The effective direction of the support device is opposite to the input
direction of rotation.
5
Connect torque wrench to torque multiplier.
6 Turn over the clutch for 3 times. (No record of measured values!).
7
Inspect the breakaway torque with a torque wrench.
NOTE
Check transmission ratio of the torque multiplier. The measurement
must be repeated a few times (min. 2x) in order to obtain a stable
value.
8
Compare the measured value with the limits.
If the value is greater or smaller than the limit values, the overload clutch
must be inspected, repaired or overhauled in accordance with the BRP-Ro-
tax instructions for continued airworthiness.
Breakaway torque
Engine type minimum Limit maximum Limit
912
600 Nm (442 ft.lb) 800 Nm (590 ft.lb.)
ATTENTION
Possible damage to the gearbox and slipping of the overload clutch.
The maximum limit must not be exceeded. Values below the minimum limit may cause
a slipping of the overload clutch that result in an overspeed.
Step
Procedure
9 Remove torque multiplier and torque wrench.
10
Release the crankshaft.
See Chapter 12-20-00 section Locking/loosen of the crankshaft.
11
Install the propeller according to the manufacturers instruction.
05–50–00
Page 14
January 01 2020
Effectivity: 912 Series
Rev. 0
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