BRP-Rotax
Maintenance Manual
Effectivity 912/914 Series
Edition 1 / Rev. 0
72-00-00
page 79
May 01/2007
d02622
3.13.2) Checking the piston ring
See Figs. 72-88 and 72-89.
Check the end clearance of the cleaned piston rings.
To determine the end clearance (4), remove the piston rings from the
piston using piston ring pliers, clean them and insert into the cylinder.
Use a piston as pusher to align piston squarely in cylinder and
approx. 10 mm (0.395 in.) from the top edge. The end clearance is
measured using the feeler gauge (4), see dimension (PI07).
See 72-00-00 / 4.
By closely inspecting the ring surface (5), the portion of surface contact
can be seen and indicates the wear. Install piston rings using piston ring
pliers with the marking (6) "TOP" or the dot mark pointing upwards
towards the piston crown.
Maß
dim.
00294
PI07
top
top
Kompressionsring/compression ring
Minutenring/bevel-edged ring
Ölabstreifring /
oil scraper ring
00296
5
3
4
5
Fig. 72-89
Fig. 72-88
6
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