Method of removing a track pin from a track shoe

A method for removing a compressed rubber bushing from an annular space between a relatively large diameter smooth cylindrical bore extending through a track shoe and a relatively small diameter track pin extending through said bore;

• said method including the steps of providing an annular cutter element with an internal diameter as a sliding fit on the pin and an external diameter as a sliding fit on the bore surface so that the annular thickness of the cutter element is the same as the annular thickness of the compressed rubber bushing;
• providing a series of cutting teeth on an end edge of the annular cutter element;
• providing a reduction in the external diameter of the cutter element at a locality spaced a very slight axial distance from the cutting teeth to form an inwardly-directed shoulder at the outer side surface of the cutting teeth;
• rapidly rotating and simultaneously advancing the annular cutter element against the rubber bushing for a depth of approximately two inches to form rubber particulates at the teeth-rubber interface;
• withdrawing the cutter element out of the cylindrical bore to enable the aforementioned shoulder to remove particulates from the bore, and repeating the steps of advancing and withdrawing the rotating cutter element until the cutting teeth have advanced entirely through the bushing material.