Patent ID: 8376619

Claim:
A slide bearing assembly comprising: a slide bearing that is part of an excavator with front end attachments having joints, said slide bearing being formed of a porous sintered alloy-made bushing having pores; a shaft inserted in said slide bearing and supported to be slidingly rotatable in a circumferential direction; a lubricating oil impregnated in said pores of the bushing, wherein the lubricating oil exudes from said pores while the slide bearing slides relative to the shaft and lubricates the interface between the slide bearing and the shaft; a slide bearing grease supplied between the slide bearing and the shaft; wherein the slide bearing grease contains a base oil having a dynamic viscosity lower than that of said lubricating oil, and while the relative sliding between the slide bearing and the shaft is maintained in a stationary state, the base oil of the slide bearing grease exudes under a load of said shaft to form an oil film between said slide bearing and said shaft.