Rotax 912 i Series Maintenance Manual page 143

SYSTEM DESCRIPTION
The propeller shaft is driven by the crankshaft by
means of a linear helical gear unit. Gear ratio
Crankshaft : propeller shaft 2.43 : 1.
The propeller gearbox has a damping means to
counteract torsional vibrations. This consists of
torsional shock absorption by means of contou-
red dogs with axial spring loading by disc
springs.
NOTE: This overload clutch also protects the
crankshaft from overloading if the
propeller comes into contact with the
ground.
SAFETY INSTRUCTIONS
WARNUNG WARNING
Danger of severe burns and scalds! Always
allow the engine to cool down to ambient tem-
perature before starting any work.
WARNUNG WARNING
During work on the engine there is a risk of life-
threatening injuries from the propeller and
rotating parts in the engine!
- Ensure that the ignition is switched off!
- Disconnect the battery
- Prevent the engine from being unintentio-
nally switched on!
CONNECTIONS FOR DISPLAY SYSTEMS
NOTICE
WARNUNG
Follow the instructions in the installation manual
regarding connections for instrumentation.
Effectivity: 912 i Series
Edition 1/Rev. 0
BRP-Powertrain
MAINTENANCE MANUAL
MAINTENANCE
As well as the maintenance and special checks,
see the relevant Maintenance Manual Line for
the respective 912 i Series engine type.
REMOVAL
REMOVAL OF THE PROPELLER GEAR-
BOX
Preparation
Before the propeller gearbox is removed, the
work described below must be carried out to
identify any further malfunctions in the propeller
gearbox and rectify them as part of repair work.
WARNUNG
If these checks are omitted, it may be necessary
to dismantle the propeller gearbox again to rec-
tify any faults after it has been repaired.
- General visual inspection. See relevant Main-
tenance Manual Line for the 912 i Series
engine type.
- Engine cleaning. See relevant Maintenance
Manual Line for the 912 i Series engine type.
- Carry out an engine test run. See relevant
Maintenance Manual Line for the 912 i Series
engine type.
- Remove surrounding assemblies and detach
oil lines.
NOTE:
Step
1
2
NOTICE
The assemblies and lines are only to
be removed if necessary and only as
far as is necessary!
Procedure
Fix the crankshaft into place. See relevant
Maintenance Manual Line for the respec-
tive 912 i Series engine type.
Loosen eight M6 Allen screws and two M8
Allen screws together with the washers
from the gear cover diagonally from each
other. The gear cover is held in place with
two dowel pins.
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Page 5
July 01/2012