13) Propeller Gearbox Refitting - Rotax 912 Series Maintenance Manual

14.4.13) Propeller gearbox refitting

9
2
5
1
10
8
ø 40,8 mm
1,606 in.
fig. 156
00276
Effectivity: 912 Series
AIRCRAFT ENGINES
MAINTENANCE MANUAL II
See fig. 155, 156 and 157.
Heat up gear cover Q in oven to approx. 100° C (214° F), insert oil seal W
40x55x7 (sealing lips lubricated with motor oil) from the inside, using
punch, part no. 876 518. Add distance ring E 36x50x5,5 with rounded side
R towards oil seal. Press in ball bearing T, utilizing press-ring, part no.
877 320, and insertion punch, part no. 877 275. Fix bearing in position,
using 4 hardened washers Y 7,2/18,8/3 and hex. screws U M7x16.
NOTE: Secure screws with LOCTITE
(135 in.lb).
3
4
6
7
11
12
00272
fig. 155
shaft, using circlip pliers. Apply LOCTITE
gear o and fit it. Slide plastic thrust washer p 33,2x51x1,2 coated
on both sides with LOCTITE
propeller shaft.
CAUTION: If the disk springs are not fitted centrically, the dog gear
cannot be depressed enough to allow insertion of the
ring halves. Do not increase the press force, but disas-
semble the gearbox again and fit disk springs better
centered.
NOTE: Apply LOCTITE
the disk springs, on the dogs and the tooth profile of the
propeller shaft.
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If fitted pull out both dowel pins from gear cover
and place gear housing on a suitable support I
with a recess for the propeller shaft. Apply
Anti-Seize to bearing seat P 35 mm
LOCTITE ®
(1,4 in.) diameter and press propeller shaft O
from outside into gear cover.
CAUTION: Do not tap!
Make absolutely sure to support the inner ring {
of the bearing with suitable tube }. It is an
advantage if gear cover is still warm at this stage.
Turnaround gearcover. Fit distance sleeve q
35,2x42x8 and eccenter w for fuel pump. Then fit
step collar e with diameter 40,8 mm (1,6 in)
facing towards disk spring, 2 disk springs r
placed against each other and the 3
t with the back facing the previous disk spring.
Take care that the disk springs rest on the centering
collar y. Apply LOCTITE
pre-assembled overload clutch u and slide into
position on propeller shaft. Carefully fit bearing
bush i lubricated with motor oil on propeller
®
Anti-Seize, and drive gear [ onto
®
®
Anti-Seize on the contact surfaces of
221 and tighten to 15 Nm
rd
disk spring
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Anti-Seize to teeth of
Anti-Seize on dogs of dog
page 99
Initial issue, Jan. 01/2002