bpr Rotax 912 i Series, Maintenance Manual, Page: 231 / 458

Effectivity: 912 i Series
Edition 1/Rev. 0
d
059
35.
fm
MAINTENANCE MANUAL
BRP-Powertrain
72-30-10
Page 19
July 01/2012
CYLINDER INSTALLATION
Fig. 17
Fig. 18
FINISHING WORK
- Install the cylinder head. See section
72-30-00.
- Purge the lubrication system.
NOTE:
Before commissioning, take note of
SI-912-018 Purging of lubrication sys-
tem.
m
WARNUNG
NOTICE
The suitable piston ring spanner part no.
876967 must be used to avoid ring breakages.
Ensure that the piston ring joints are in the spe-
cified angle range. See Figure 17.
Step Procedure
1 Install the piston ring in the centre of the
lower piston skirt.
2 Install the compression and oil scraper
rings on the upper piston skirt, inclined
away between 25° and max. 30°.
1. Piston ring 2. Compression ring
3. Oil scraper ring 4. Pistons
m
WARNUNG
NOTICE
The ring gap should never come to lie in the re-
gion of the piston pin eye.
m
WARNUNG
NOTICE
Double-check that piston pin circlips are instal-
led properly.
Step Procedure
3 Install the 87x2 O-ring on the cylinder
neck and lubricate the cylinder running
surface.
4 Lubricate the piston, compress the piston
rings with piston ring spanner part no.
876967 and carefully install the corre-
sponding cylinders.
NOTE: Repeat this process for the other
cylinders.
1. Pistons 2. Cylinders
3. 87x2 O-ring 4. Piston ring spanner
part no. 876967