Yamada 852246 Pump Part Exploded View Diaphragm, Model NDP-80BPT & Air Operated Double Diaphragm Pumps Repair Parts PDF Manual. Air Motor Kit: K80-AM, Liquid Side Kit: K80-PT, Center Body Assembly: 803113, Valve Body Assembly: 802971, C-Spool Assembly: 805084 Available. Diaphragm, Manifold, Center Disc, Center Rod, Air Chamber, Wave Washer, O-Ring, Ball, Valve Seat, Reset Button, Base, Silencer, Bearing, Gasket, Bolt, Nut.