Posted by The tractor vet on April 12, 2014 at 20:42:44 from (75.19.115.57):
In Reply to: Re: Engine repowers posted by B t on April 12, 2014 at 08:19:21:
About and inch on the top . The one thing you can not do is use and L P head . They are 4 and 1/8 pistons . No machine work on the block . I did a buddys S/MTA several years back . That tractor belonged to his grandfather . We put back in what we took out as the high alt. pistons were installed way back in about 1957 after that tractor burnt while under a corn picker and and old I H mechanic did the work the first time and that S/MTA was always a super runner way more power then any 560 around and only my buddy's grandfather and the old mechanic knew what was done to it . Till he brought it to me for a rebuild i had no idea what was in that engine till i opened it up all i knew was his S/MTA ran way better them mine did and his was plum wore out . When i pulled the engine out and pulled the head that is when i saw them pistons and i ain't never seen nothing like them before , talk about a DOME it really stands out . Well the numbers that were on them were I H part # . and they were 4 1/8 with sleeves Then the head # came up as a 450 gas head and it had a 450 manifold on it along with a 450 cam . The dist had the curve kit of a 450 and the carb was worked over a bit . It took some digging to get the pistons but i found one place that has them and we took a drive out to see Clyde Burkshire. Clyde fixed me up with the pistons and sleeve kits .Now don't ask how much as this has been maybe fifteen years ago . Is this in a PULLING tractor , Ah no it is a working tractor on a dairy farm . Back when i did the rebuild it was the main tractor . It did the plowing pulling 4x16 trailer plows and a 13and a half foot disc it did the chopping of the corn silage hauled manure every day for about three years till he got the 1950 Oliver then it got put back to the second tractor and as the years past it kept getting further back in line as bigger tractors were bought . Now it does the feed grinding on a New Holland 355 grindermixer and it does the spraying .
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