Rotax 912 i Series Maintenance Manual page 227

CYLINDER INSTALLATION
NOTICE
WARNUNG
The suitable piston ring spanner part no.
876967 must be used to avoid ring breakages.
Ensure that the piston ring joints are in the
specified angle range. See Figure 17.
Step
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°.
Fig. 17
1. Piston ring
3. Oil scraper ring
NOTICE
WARNUNG
The ring gap should never come to lie in the
region of the piston pin eye.
Effectivity: 912 i Series
Edition 1/Rev. 0
BRP-Powertrain
MAINTENANCE MANUAL
Procedure
2. Compression ring
4. Pistons
NOTICE
WARNUNG
Double-check that piston pin circlips are in-
stalled properly.
Step
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 corres-
ponding cylinders.
NOTE: Repeat this process for the other
cylinders.
Fig. 18
1. Pistons
3. 87x2 O-ring
FINISHING WORK
- Install the cylinder head. See section
72-30-00.
- Purge the lubrication system.
Before commissioning, take note of
NOTE:
SI-912-018 Purging of lubrication sys-
tem.
Procedure
2. Cylinders
4. Piston ring spanner
part no. 876967
72-30-10
Page 19
July 01/2012