Fuel bowl, glass, 3-5/8 inch diameter .350 inch dia. screw hole, for diesel engines. Tractors with D179 engine: 484 to engine s/n 376419, final filter in 454, 464, 2400A. Tractors with D206 engine: 584 to engine s/n 318209. Tractors with D239 engine: 574 to engine s/n 103204, 664, 674 to engine s/n 473984, 684 to engine s/n 667678. Tractors with D246 engine: Hydro 84 to engine s/n 120520, 784 to engine s/n 120520.