Abstract: In a multiple piston axial type pump, a support saddle and cooperating swash block are enclosed by a housing. A pair of arcuate bearing shells are attached to spaced apart bearing seats formed on the swash block. The bearing shells contact load bearing surfaces on the support saddle. The length of each of the bearing shells is less than the length of the support saddle load bearing surfaces so that the facing surfaces of the bearing shells are always in complete contact with the load bearing surfaces throughout the complete range of relative positions of the support saddle and the swash block.

Abstract: The casing of a pump defines a threaded hole into which is inserted an outer block for reacting radially directed forces transmitted by a second inner block from a movable, pressurized cam ring surrounding the pump rotor. The blocks have mutually parallel mating surfaces arranged generally tangential to the ring. Onto one of such surfaces is bonded an anti-friction bearing material, such as a woven fabric or metal, to facilitate sliding action between them. The eccentric position of the cam ring is partly established by the action of system pressure acting on control pistons while the guided motion of the inner block further positions the ring to optimal adjustments made to the outer block.

Abstract: The casing of a pump defines a threaded hole into which is inserted an outer block for reacting radially directed forces transmitted by a second inner block from a movable, pressurized cam ring surrounding the pump rotor. The blocks have mutually parallel mating surfaces arranged generally parallel to a plane tangential to the ring. Onto one of such surfaces is bonded an anti-friction bearing material, such as a woven fabric or metal, to facilitate sliding action between them. The eccentric position of the cam ring is partly established by the action of system pressure acting on control pistons while the guided motion of the inner block further positions the ring to optimal adjustments made to the outer block.