NACIONAL MOTOR Derbi Euro 3, Руководство по ремонту

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23
C
HECKING THE CYLINDER AND PISTON
- Check the ring point gaps by inserting them lined up
into the cylinder and checking the gap with a thickness
calliper.
Minimum limit:
0,15
mm.
Maximum limit:
0,35
mm.
- Check the degree of cylinder wear with the aid of an
alexometer. Pre-calibrate it based on the dimensions set
out in the attached cylinder family table.
- Piston.
- Check the piston on two axis and at three height levels.
Service limit:
0,05
mm.
- Check the diameter of the piston on the transverse axis
to the gudgeon pin at a distance of 15mm from the bottom
of the piston base.
Service limit:
0,01 mm.
C
HECKING THE CYLINDER AND PISTON
MI MI
A
B
C
D
39.850
39.855
39.860
39.865
Family ØPiston±0.0025mm ØCylinder±0.0025mm
39.890
39.895
39.900
39.905
Play
0.035 ÷ 0.045