KYMCO Downtown 300i ABS, Руководство по обслуживанию, Страница: 85 / 263

7. CYLINDER/PISTON
7-5
Downtown 300i ABS
Measure the piston pin O.D.
Service Limit : 16.994 mm replace if
below
Measure the piston O.D.
Service Limit : 72.70mm 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 :
72.70 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.
＊