Rotax 912 i Series Maintenance Manual page 194

Fig. 26
3
Maß
dim.
1. Push-rod
3. Rocker arm bushing
Step
1 Check the surface of the rocker arm shaft
and the inner diameter of the rocker arm
bushing for traces of wear.
2 Check the valve support surface and ball
joint of the rocker arm.
NOTICE
WARNUNG
If excessive wear is visible in the rocker arm
bearing, this indicates a lack of oil. The support
surface for the valve stem can be post-
machined a little.
Oversized rocker arm shafts and ro-
NOTE:
cker arm bushings are available to
provide the option of repairing the ro-
cker arm bearing in the cylinder head.
Effectivity: 912 i Series
Edition 1/Rev. 0
BRP-Powertrain
MAINTENANCE MANUAL
4
2
1
06454
2. Ball joint
4. Oil ducts
Procedure
Fig. 27
1. Rocker arm
3. Valve guide
ROCKER ARM BUSHING
With the rocker arm bushings (plastic bushing),
ensure that the plastic bushing is a sliding seat.
This can rotate relative to the rocker arm bore
after installation too. The rocker arm bushing is
therefore provided with an outer circular groove
to allow oil supply. The rocker arm bushing can
be installed independently of position.
Oversized rocker arm shafts and ro-
NOTE:
cker arm bushings are available to
provide the option of repairing the ro-
cker arm bearing in the cylinder head.
In this case ensure that the correct ro-
cker arm bushing is installed. The
oversized rocker arm bushing part no.
933397 has two mutually opposite
bores for identification and differenti-
ation.
Fig. 28
1. Rocker arm bushing
2. Rocker arm shaft
4. Ball joint
2. Groove
72-30-00
Page 16
July 01/2012