Yamada 851840-FDA Pump Part Exploded View Diaphragm, Model DP-10BST-FDA & Air Operated Double Diaphragm Pumps Repair Parts PDF Manual. Air Motor Kit: K115-AM, Liquid Side Kit: K10-SH-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.