Rev. Counter Drive; Propeller Gearbox - Rotax 912 Series Maintenance Manual

14.3) Rev. counter drive

See fig. 124, 125 and 126.
Driving gear of the mechanical rev.
counter
and it is driven via the worm gear
W
pressed into the camshaft.
Remove Allen screw M5x16 E and
lock washer and withdraw rev. coun-
ter housing R along with O-ring
T and rev. counter shaft Y
00242
fig. 124
9
3

14.4) Propeller gearbox

See fig. 127, 128, 129 and 130.
Before removing the gearbox it is useful to check the slipping torque, see Mainte-
nance Manual type 912 (Line Maintenance) Chapter 12-00-00 para 7.2.
6
Effectivity: 912 Series
AIRCRAFT ENGINES
MAINTENANCE MANUAL II
Q
is offered as an option
from ignition housing, see para
13.3.9.
Inspect teeth U and square end I of rev. counter shaft. At oil leakage
renew oil seal O 6x11x3 resp. O-ring T. Press in new oil seal right down
to stop in housing using punch, part no. 877 680.
2
On engines without a mechanical rev-counter a cover plate is fitted instead
of the rev-counter housing R.
Remove the remaining Allen screws M6 Q and 2 Allen
screws M8 W with lock washers crosswise from gear cover
4
fig. 127
00244
5
8
4
3
5
2
1
1
00241
fig. 125
7
fig. 126
00243
6
E. The gear cover is kept in
position by 2 dowels. Screw
puller R, part no. 877 660,
into the two M8 threads T of
gear cover. Now the com-
plete gearbox can be pulled
off with the impact puller Y
without damaging the ball
bearing and the propeller
shaft.
Initial issue, Jan. 01/2002
page 86