Yamada 851964-FDA Pump Part Exploded View Diaphragm, Model NDP-15BSH-FDA & Air Operated Double Diaphragm Pumps Repair Parts PDF Manual. Air Motor Kit: K15-AM, Liquid Side Kit: K15-MH-FDA, Body Assembly: 803564-FDA Available. Diaphragm, Manifold, Center Disc, Center Rod, Air Chamber, Wave Washer, O-Ring, Ball, Valve Seat, Reset Button, Base, Silencer, Bearing, Gasket, Bolt, Nut.