Propeller Gearbox - Rotax 912 Series Maintenance Manual

3.9)

Propeller gearbox

See Figs. 72-20 and 72-21.
Before removing the gearbox, it is advisable to check the slipping torque. See
the corresponding Maintenance Manual (Line Maintenance) for the respective
engine type, 912 Series or 914 Series.
■ CAUTION : When removing the gearbox, take care not to damage the
Remove 8 allen screws (1) M6 and 2 allen screws (2) M8 together with the lock
washers crosswise from the gear cover (3). The gear cover is kept in position
by 2 dowel pins. Screw puller (4), part no. 877660, onto the two M8 taps (5) of
the gear cover (3). Now the complete gearbox can be pulled off with the impact
puller (6) without damaging the ball bearing and the propeller shaft.
Release hex. nut M30x1.5 (3) with wrench 41 a/f, part no. 877445 and remove
the drive gear with friction washer (4) from the crankshaft. If required, lever drive
gear gently off with 2 screwdrivers.
◆ NOTE:
Make sure that both dowel sleeves remain in the crankcase and not in the
gearbox housing.
■ CAUTION : The gear set has a continuous 6-digit serial number which is
Effectivity 912/914 Series
Edition 1 / Rev. 0
BRP-Rotax
Maintenance Manual
bearing seat and the oil seal running surface of the propeller
shaft.
Hex. nut has lefthanded thread!
shown on the front side of the drive gear (5) and on the dog gear.
The gears are paired as a set and must not be exchanged
individually.
72-00-00
page 22
May 01/2007