DESCRIPTION One New Aftermarket Replacement Inner Valve Spring Fits Industrial/Construction Models – 11, 31, 33, 44B, 50, 50B, 50C, 50E, 50EX, 50F, 50H, 50HX, 60H, 70, 80, 400, 450, 450D, 450S, 470 Fits Oliver Tractor – 1850 Fits Allis Chalmers Tractors – 170, 175 Fits White Tractors – 2-85, 2-88, 2-105, 2-110 Fits Massey Ferguson Tractors – 165, 175, 180, 255, 265, 275, 283, 285, 290, 298, 350, 375, 383, 390, 390T, 393, 398, 399, 670, 690, 698, 698T, 699, 1080, 1085, 1100, 1105, 1130, 1135, 2640, 2675, 2705, 3050, 3060, 3070, 3090, 3505, 3525, 3545, 3630, 3650, 6500 Technical information: – 9 spools – Free length – 2.00 ” Replaces part numbers: 735525M1, 733822M1, 780273, 31744131, 747813??1, 31744127, 747813??1