Operation Manual

CHECKING THE CYLINDER
AND THE PISTON
- Check the piston ring gaps, inser-
ting them into the cylinder bore and
measuring the gap with a feeler
gauge.
Maximum permitted piston ring gap:
0.5 mm.
- Check the amount of wear in the
cylinder, using an alexometer.
Calibrate the alexometer previously
using the dimensions given in the
table of cylinder - piston families.
- Perform measurements across two
perpendicular axes and at three dif-
ferent heights.
Service limit: 0.05 mm.
- Check the diameter of the piston
over the diameter perpendicular to
the gudgeon pin and at a distance
of 15 mm from the bottom edge of
the piston skirts.
Service limit: 0.06 mm.
10-2
A
B
C
D
Family Piston ± 0.0025
39,845
39,850
39,855
39,860
Cilinder ± 0.0025
39,870
39,875
39,880
39,885
Play
0.020 - 0.030