You can get sorts of reliable piston pump parts like cylinder block, piston, valve plate, retaining plate, ball guide, shaft, swash plate for piston pumps or motors. All of these parts are highly interchangeable with genuine products for pump repairing.
Sauer piston pump parts: PV20, PV90 series;
Rexroth piston pump parts: A2F, A4VSO, A4VG,A6V,A7V, A8V, A10VSO, A11V;
Vickers pston pump parts: PVB, PVQ,PVE, PVH series
Caterpillar piston pump & motor parts: CAT12G/14G/16G/320C/215/225/235/245;
Komastu piston pump & motor parts: HPV35/55/90/160; Linde piston pump parts: HPR100/130/160, B2PV50/75/105.
Kawasaki piston pump & motort parts: K3V112, M2X63/120; etc.