13
Engine,
Crankshaft,
Pistons
PISTON
MARK
.IN GS
A - Letter
adjacent
to arrow corresponds
with index of spare part number
of
respective piston;
it
serves
as
an
identification
mark.
B - Arrow (embossed) shows direction piston
must
be
installed towards flywheel.
C - Paint mark indicating
size
group (blue,
pink).
D - Weight group
indication(+
or
-)
.embossed
or
stamped in ink.
E - Weight group indication
by
paint mark
(brown
'"'
-weight,
gray = + weight).
F - Piston size in mm
• .
CHECKING
PISTONS
13-4
a - Upper compression ring
b - Lower compression ring
c -
Oil scraper ring with spring
Piston Marking Checking Pistons
Checking piston ring end
gap.
Slide in ring
at
right angles through bottom
of
cylinder opening,
at
approximately 4
to
5 mm
from edge of
cylinder.
End
Grap
Wear Limit
mm
mm
Upper compression ring
0,35-0.55
0,90
Lower compression ring
0,35-0,55
0.90
Oil scraper ring
0.25-0,40
0,95
Printed
in
Germanv·
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