Universal piston pin remover and installer

Abstract

Relates to tools or fixtures for removing press fit piston pins from automobile engine pistons for repair or replacement and for installing repaired or new pins in pistons. More specifically, the invention accomplishes these operations without imposing any load on the piston, thus eliminating the possibility of deforming or otherwise damaging the softer piston. To this end, one of the supporting structures of the tool is shaped in a special way to be received within the skirt of the piston and underlay the smaller end of the connecting rod thereby to receive the driving forces applied to advance a piston pin through the bore of the connecting rod for the purpose of either removing the pin or installing the repaired pin or its replacement. Other features of the invention have to do with the provisions associated with the same tooling device for centering an installed piston pin in the bore of the connecting rod and for employing the same part of a support block for performing the steps of both removing and installing piston pins in the aligned bores of the piston and connecting rod assemblies. A micrometer type adjustment provision forms part of the piston pin driver assembly and cooperates therewith to automatically stop further advancement of the piston pin when it attains a centered position in the connecting rod.