Abstract: A pivot joint mechanism for connecting together two relatively movable members which includes a stepped opening through one of such members in the form of an inwardly extending flange at one end of such opening, an intermediate section, and a threaded section at the opposite end of said opening. A retainer ring threaded into said threads captures a bearing mechanism between said retainer ring and said flange.

Abstract: A boom mechanism including a linkage which interconnects the frame of a loader with the boom arm and the loader bucket. The linkage includes a cross-shaped member having arms extending forwardly, rearwardly and laterally. The rearward arm is pivotally connected to a hydraulic cylinder which is pivotally connected to the frame. The forward arm is pivotally connected to the bucket. The two lateral arms are pivotally connected to a pair of push rods which are pivotally connected to the sides of the boom arm.

Abstract: A pin retention mechanism for a pivot joint which connects together two structural members of a machine for pivotal movement relative to each other. The pivot pin has a dynamic connection with one of the structural members and there is an annular spacer on the pivot pin adjacent the dynamic connection. The other structural member has a tapered opening through it with the taper either on the structural member itself or on a bushing within an opening in the other structural member. A collet in the tapered opening has an external surface mating with the tapered internal surface. A cylindrical sleeve is located between the collet and the pivot pin and in contact with the spacer.

Abstract: The tapered hinge pin has a generally cup-shaped collar with an internal taper complementing the external tapered end portion of the hinge pin and is movable into wedged position in a surrounding bore by a first bolt passing through an enlarged threaded opening in an end wall of the collar and threadedly engaged in an axial bore in the tapered end portion of the pin. Disassembly of the hinge pin is achieved by removing the first bolt and inserting a second, larger-diameter bolt into the threaded opening in the collar end wall and advancing the second bolt by turning. Enhanced operation is achieved by providing an auxiliary bearing member in the form of either a stud insertable into the bore in the pin end or antecedently providing a washer around the first bolt intermediate the pin end and the collar end wall such that the washer drops and partially obturates the end wall opening upon removal of the first bolt so as to act as a bearing surface for the second bolt.