Abstract: A hub is mounted or dismounted by the use of hydraulic pressure with the hub being the only movable member. Either of two seals of different diameters are used in conjunction with a third seal of an intermediate diameter so as to establish a differential annular area between the two seals in use. Depending upon which pair of seals is used, hydraulic pressure tends to either force the hub onto or off of the shaft.

Abstract: Apparatus and method for assembling a flexible damped bearing within a rotary machine for properly locating the various bearing components in reference to the machine shaft, whereby the bearing will respond to the shaft in a predetermined manner.

Abstract: A fluid-to-fluid shaft seal assembly including at least one pressure breakdown bushing within the sealing region encompassing the shaft of a rotary machine and being loosely housed within the machine frame. The bushing includes an inwardly extended arm passing downwardly into an undercut formed within the shaft. A balancing ring extends between the arm and one wall of the stator opening. The ring is strategically located in respect to the bushing whereby the forces exerted upon the bushing by the sealing fluid are pressure balanced to permit the bushing to move freely in a radial direction to comply with the shaft as the shaft deflects and thus prevent the bushing from locking against the machine frame.