How to Select Piston and Bearing

How to Select Piston and Bearing





^ The identification grade stamped on each part is the grade for the dimension measured in new condition. This grade cannot apply to reused parts.
^ For reused or repaired parts, measure the dimension accurately. Determine the grade by comparing the measurement with the values of each selection table.
^ For details of the measurement method of each part, the reuse standards and the selection method of the selective fitting parts, refer to the text.

HOW TO SELECT PISTON
When New Cylinder Block is Used





Check the cylinder bore grade ("1", "2", or "3") on rear side of cylinder block, and select piston of the same grade.

NOTE: Piston is available with piston pin as a set for the service part. (Only "0" grade piston pin is available.)

When Cylinder Block is Reused
1. Measure the cylinder bore inner diameter.





2. Determine the bore grade by comparing the measurement with the values under the cylinder bore inner diameter of the "Piston Selection Table".
3. Select piston of the same grade.





NOTE:
^ Piston is available together with piston pin as assembly.
^ Piston pin (piston pin hole) grade is provided only for the parts installed at the plant. For service parts, no piston pin grades can be selected. (Only "0" grade is available.)
^ No second grade mark is available on piston.