Excavator Pump Parts Kayaba Piston Shoe PSVD2-27E PSVD2-26E Set of 10 pcs Excavator Parts Thrust Transmission and Angle Self-Adaptation Pistons perform reciprocating linear movement inside cylinder blocks; the swash plate remains fixed in inclined orientation. With spherical hinge coupling, the piston shoe swings flexibly along with swash plate tilt and transfers piston axial thrust uniformly to the swash plate. In the absence of piston shoes, piston ball heads contact the