How to Select Piston and Bearing

How to Select Piston and Bearing





DESCRIPTION
^ 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 repair parts, measure the dimension accurately. Determine the grade by comparing the measurement with the values or 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 A PISTON

When New Cylinder Block is Used





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





Piston Selection Table

NOTE:
^ The piston is available together with piston pin as an assembly.
^ The piston pin (piston pin bore) 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 grade mark is indicated on 2 grade piston.