D3NN8501B Years:1965&Up Water Pump & Gaskets W/ Back Housing. Double Pulley. NOTE: Tractors Built Prior To '86 Will Need Stepped Bolt #9840353 Supplied By New Holland. Fits Ford Tractors:230A, 231, 2310, 233, 234, 2600, 2610, 2810, 2910, 333, 334, 335, 340, 340A, 340B, 3600, 3610, 3910, 4100, 4110, 420, 445, 445A, 450, 4600, 4610, 515, 530A, 531, 535, 540, 540A, 540B, 545, 545A, 550, 555, 555A, 555B, 5600, 5610, 650, 6500, 655, 655A, 6600, 6610, 6700, 6710, 6810, 7410, 750, 7500, 755, 755A, 755B, 7600, 7610, 7700, 7710. Replaces Ford Part Numbers:D5NN8501F, D8NN8501DA, D8NN8501TA, D8NN8501TB, D8NN8501TC, E6NN8501CB.