12) Gearbox Components Check - Rotax 912 Series Maintenance Manual

14.4.12) Gearbox components check

00265
1
Maß/dim.
Effectivity: 912 Series
AIRCRAFT ENGINES
MAINTENANCE MANUAL II
See fig. 149, 150, 151, 152, 153 and 154.
Clean disassembled gearbox with kerosine or gasoline and check the
following components:
— Verify crankshaft bearing bushing Q fitted in gear cover, for inside
diameter { and tight fit, see para 15.
— Take dimensions of both bearing seats W and E on propeller shaft.
See dim. } and dim. q in para 15. Inspect oil seal contact area R and
T. Verify propeller shaft between centres for straightness and propel-
ler flange for out-of-true w, see para 15.
fig. 149
{
— The surface of propeller shaft
must be free of fretting corrosion
on the bearing seats W and E.
The ball bearing Y 6207 E (35x72x17) has to be fitted with
a press fit between inner race and prop shaft as well as
with a press fit between outer race and gearbox cover. Inspect groove
U for ring halves and teeth I for wear or damage.
On configuration 3 check the inner diameter O of propeller shaft in the
area of oil inlet flange P, see dim. e in para 15.
Inspect propeller shaft for cracks by magnetic particles inspection method
(MPI), see para 11.4. Check tangential intensity of magnetic field with test
instrument DEUTROMETER
indication of cracks renew the respective part. Clean and demagnetize the
part. The maximum admissible remaining magnetism must not exceed 1,2
A/cm. Register the results of the magnetic particle inspection in the
respective Form Sheet, see para 16.3.
w
Maß/dim.
6
3
4
fig. 150
®
3870. Nominal value is 10 ÷ 50 A/cm. At
2
5
00266
7
8
9
00267
fig. 151
e
10
page 97
Initial issue, Jan. 01/2002