841375M1 One New Keeper Valve Fits Massey Ferguson Mexico 66 Official online store Onitsuka Tiger IE. One New Aftermarket Replacement Keeper Valve Fits Massey Ferguson, Fits Ford, Fits Case, Fits International Harvester, Fits Allis Chalmers Tractors This pin style keeper valve (also known as a valve lock or valve spring retainer keeper) is a precision valvetrain component that seats into the groove on the valve stem and retains the valve spring retainer in place during engine operation. Proper fitment of this small but critical part keeps intake and exhaust valves properly seated and prevents valvetrain failure. This part is commonly used in engine rebuilds and valve jobs across a wide range of vintage agricultural, industrial, and construction equipment. Compatible Models Fits Massey Ferguson Tractors: 50, 65, 85, 88, 165, 175, 178, 180, 302, 304, 3165, Super 90 Fits Massey Ferguson Industrial Construction: 200, 302, 303, 304, 3165 Fits Ford Tractors: 2N, 8N, 9N, NAA (Jubilee), 501, 541, 600, 601, 611, 620, 621, 630, 631, 640, 641, 650, 651, 660, 661, 671, 681, 700, 740, 741, 771, 800, 801, 811, 820, 821, 840, 841, 850, 851, 860, 861, 871, 881, 900, 901, 941, 950, 951, 960, 961, 971, 981, 1811, 1841, 2000, 2031, 2111, 2120, 2130, 4000, 4030, 4121, 4130 Fits International Harvester Tractors: A, B, C, Super A, Super H, H, 100, 130, 140, 200, 230, 240, 300, 330, 340, 350, 404, 424, 2404, 2444, 2504 Fits Case Industrial Construction: W3, W5, W11, 210B, 300, 310, 320, 350, 420, 430, 450, 480, 480D, 530, 580, 1737, 1740 Fits Allis Chalmers Tractors: B, C, CA Fits Allis Chalmers Industrial Construction: H3 Fits Allis Chalmers Engines: 125, 149 Minneapolis Moline Tractors: Jet Star, Jet Star 2, Jet Star 3, R, RT, RTI, RTU, Super 4 Star, Z, 335, 445 Replaces Part Number(s): 841375M1, 1005452M1, 841375M91, A30004, 42026D, VT3234, 367452R1, 70206880, 206880, 33K51, 7HA6518, T30118, 84032542, 87778064, 1959722C1 New aftermarket replacement part not remanufactured, not used.