Re: super m cam

Posted by D Slater on July 06, 2007 at 13:58:15 from (72.65.143.131):

In Reply to: super m cam posted by point3dave on July 06, 2007 at 09:35:42:

Its best to look at what cam you have and what cam your buying. If you can find the # on it(usualy found on rough surface near front between machined parts) sometimes you can't read them or find. If you can find the # the ones that end in D suffix were used in M,SM,SMTA tractors. Ones that end with DA have the revised Valve timeing and were used in 400 and roughfly first 1/3 of 450 tractors. The cam was released for new 400 tractors but IH didn't always change at a certain time so some of the last SMTA could have ben equiped. ones ending with DB had the left hand thread change and used on rest of 450 tractors. When a cam change was made IH sold that cam for M tractors and whatever other tractors in series up until change was made for replacements after stock on hand run out. So later parts books printed will show same cam # for those tractors. Don't expect to find the same # on cam thats in parts book. On a 50 or 60 year old tractor don't take for granted what cam is in it,look for # or check specs. Cam gears may get mentioned also, they were improved at least twice with last improvment starting C264 engine # 155941 witch was in 400 tractors. So don't always go on tractor model for those parts either.

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