One new replacement voltage regulator for the aftermarket. Fits Ford New Holland tractor models: 231 (Diesel with Alternative), 2310 (Diesel with Alternative), 233 (Diesel with Alternative), 234 (Diesel with Alternative), 2600 (Diesel with Alternative), 2610 (Diesel with Alternative), 2810 (Diesel with Alternative. 1/1/81-8/31/86), 2910 (Diesel with Alternative 1/1/81-8/31/86), 334 (Diesel with Alternative 1/1/81-8/31/ 86), 335 (Diesel with Alternative 10/75-9/78), 335 (Hiway Diesel with Alternative). 1/1/81-8/31/86), 340 (Diesel with alternative), 3600 (Diesel with alternative), 3610 (Diesel with alternative 1/1/81-8/31/86), 3900 (Diesel with alternative), 3910 (Diesel with alternative 1/1/81-8/31/86), 4100 (Diesel with alternative), 4110 (Diesel with alternative 1/1/81-8/31/86), 4600 (Diesel with alternative), 4610 (Diesel with alternative 1/1/81) -31.08.86), 5110 (Diesel with alt. 1.01.81-31.10.85), 530A (Diesel with alternative 1/1/81-8/31/86), 531 (Diesel with alternative), 532 (Diesel with alternative), 5600 (Diesel with alternative), 5610 (Diesel With alt. 1/1/81-31.10.85), 5700 (Diesel with alt.), 5900 (Diesel engine) Spare parts: D1Nn10316A, D3Nn10316A, D7Nn10316B