Part Number 238-6120 - A New Original O-Ring (0.103" Thick x 0.987" ID) For A CaseIH 2344, 2366, 2377, 2388, 2577, 2588 Combines, CaseIH 275, CX70, CX80, CX90, CX100, Magnum 180, Magnum 190, Magnum 210 Tractors, Case 1187, 1187C Crawler Excavator, Case 580C, 580D, 580SD, 680H, 680K, 680L, 780B, 780C, 780D Backhoe, CaseIH 2240, Patriot 2250 Sprayer, IH 4150, 4155 Compact Loader, IH 4156, 4166, 4186, 4366, 4386, 4568, 4586, 4786, 6388, 6588, 6788, Hydro 70, Hydro 100, Hydro 186 Tractors, Farmall 504, 544, 656, 756, 806, 826, 1206, 1456 Tractors, Case 300, 400 Wheel Loader.  Old Part Numbers Are 272975,  D54165, M1882101, S1982156, V25290, 1-2469, 2-5330T1, 35-1483T91, 363889X1, 386682R96, 381884R1, 398315R91, 536761R91, 70924776, 7700974, 80272975, 87041S95.