KYMCO Downtown 200i, Руководство по обслуживанию, Страница: 75 / 230

7. CYLINDER/PISTON
7-5
DOWNTOWN 200i
Measure the piston pin O.D.
Service Limit : 16.8 mm replace if below
Measure the piston O.D.
Service Limit : 65.9mm replace if below
Measure the piston-to-piston pin clearance.
Service Limit : 0.02mm replace if over
CYLINDER INSPECTION
Inspect the cylinder bore for wear or damage.
Measure the cylinder I.D. at three levels of
top, middle and bottom at 90
°
to the piston
pin (in both X and Y directions).
Service Limit :
66.1 mm repair or replace if over
Measure the cylinder-to-piston clearance.
Service Limit :
0.1 mm repair or replace if over
The true roundness is the difference between
the values measured in X and Y directions.
The cylindricity (difference between the
values measured at the three levels) is subject
to the maximum value calculated.
Service Limits :
True Roundness :
0.05mm repair or replace if over
Cylindricity : 0.05 mm repair or replace if over
Middle
Bottom
Top
Take measurement at 9mm from the bottom
and 90
°
to the piston pin hole.
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