Cams with right and left hand cam nut threads were used in a C281. More than one IH part number could be found on some cams, even though its the same use. If you can find a number ending with DA or DB its a cam like used in a 450. DB has left hand threads for the gear retaining nut, the rest have right hand threads. If its a aftermarket or a regrind the only way to tell is checking the lobes, unless they stamped there numbers on the cam. Valve timming was changed to gain a little more power over cams with the part # ending with the letter D. Don't know if its just me, but seems like the early cam uses less fuel.
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Today's Featured Article - Women and Tractors - Tractor Engine Repair - by Teri Burkholder. One of the great things about working on a tractor engine with your other half is that you know what he is thinking of at all times and can anticipate his every move and his next thought of what he will do. With Ben, anyway, I can tell! He'll be busy working and I’m handing him tools and he says, "give me that..." and I’ve already got it in his hand or "hand me that....."and I’ve got the portable light right where he needed it placed to see. "Run in the house and get me a...."as I open th
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