Abstract: An improved eccentric used in walking mechanism sub-assemblies used in heavy equipment, specifically drag line excavators. The walking assemblies include a power driven output shaft which engages and rotates an eccentric fitting journaled within a leg housing which is in turn pivotally secured to the walking assembly shoes and through a support linkage to the excavator frame imparting a modified elliptical travel path thereto. The improvement is directed to the eccentric which is of a multiple component fabrication for increased performance and use durability and extended life.

Abstract: A center pivot pin support bearing assembly to provide rotatable center restraint for a dragline excavator machine. Multiple center pin bearing support fittings imparts stabilization and additional bearing wear surfaces for increased pin useful service life before replacement. An axially center pin bore receiving fitting is provided for longitudinal spaced multiple support fits combination with a center pin receiving stabilization base and fit.