HYDRAULIC PULLER FOR GEAR-TYPE PUMP BUSHINGS Russian patent published in 1997 - IPC

FIELD: mechanical engineering. SUBSTANCE: the puller has hydraulic power cylinder with large- and small-diameter stages. The larger-diameter stage accommodates a piston with a rod ending with a cone and the smaller-diameter stage has a floating piston tightly embracing the rod. Installed over the floating piston is a bracket articulated with a rocker with cones directed to inner edges of mating halves of bushings to be dismounted. Connected with the bracket are double-arm levers with the lower ends resting against the plate spring-loaded relative to the base of the bracket. Hollow mortar is made integral with the smaller-diameter stage of the cylinder and the cylinder is provided with two oil feed holes. EFFECT: improved reliability. 1 dwg