Re: M Family Lineage

Posted by Dr.EVIL on August 15, 2006 at 07:54:00 from (216.136.115.250):

In Reply to: Re: M Family Lineage posted by Brian Greer on August 14, 2006 at 07:36:22:

Actually, ALL M's were 3-7/8" bore from the factory.... SM, SM-TA, & 400 were all 4" bore from the factory and 450's were 4-1/8" bore. Common stroke of 5-1/4" among all.
Back when these tractors were new and being used they typically had overhauls after 3 to 5 yrs, some maybe a little longer, 8 to 10 yrs. That's why You find so many M's with 4" bore, etc. In the case of My Dad's '51 M He bought new just before X-mas '51 it was over-hauled the first time with 4" 5000 ft altitude pistons in about 1956 or 1957 and repainted, then the 4" M&W FireCrater's were installed in about 1966. It was semi-retired in '72. It had further repaints in about 1968, and 2005.

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