Piston Measuring Points Piston diameter is indicated by size group stamped into the piston top. The individual size groups are shown in the piston size table. Piston measuring point is shown in Fig. 137. In order to obtain precise measurement values, we recommend the use of a fixed dial gauge which has been preset with gauge blocks. Pistons showing evidence of seizure or wear are no longer serviceable; however, if the mating cylinder is in good condition, the fault can be rectified by installing only a new piston of the appropriate size group or letter designation. |
