Re: 45 John Deere A

Posted by Leroy on February 07, 2016 at 06:35:42 from (69.88.209.2):

In Reply to: Re: 45 John Deere A posted by huntingreen2day2 on February 06, 2016 at 22:24:59:

I would just do the sandpaper bit on it, just get the rough rust off and forget it. More of what you need to think about is how wore are the cylinders, close to needing oversize pistions? I had my 51 A bored for oversize as block was too worn for standard rings. But that was back in early 70's and tractor was big tractor on the farm and heavy use all the time. I overhauled a 10 horse Kohler in shop chass one time, the rings had been stuck long enough one side of cylinder was just groves up and down. Could not get cylinder to clean up with hone. Instructor said it would have to be bored, I said no, am putting back in with just new rings and did and it ran fine for over 10 years till top of piston broke off in a ring grove. Now remember that was still the orignal piston and the rings were so stuck the they had to be pried out of the groves and after they were out a grove cleaner would not clean up the grove things were so hard in there. So pistion may have been dammaged at that time. Engine ran fine untill piston broke and did not use oil. And rember teacher said it would not run without boring and getting that cylinder smooth. So as long as new rings fit tight in cylinder bore just sandpaper the rust best as you can and put together.
First engine I ever worked on was a Brigs lawn mower engine and it got using oil so bad it would not run more than a couple of minutes, this was back in 60's and mowers then were not the throwaway items they are now. Dad took it to shop to get repaired and brought it home in a box. I thought before we just junked it I would see if I could figure out how things went together I would do it to see if I could. I had no new parts or tools to hone or anything. Studied and finally figured out how it looked like it should go together and did that. I knew knothing about putting rings in an engine but looking at them I decided I thought the ring gaps should be spaced around the piston so I did that. Used old head gasket. After I did get it together decided to see if it would run. Started up and ran perfectly and did not use any more oil, this was with the old rings and cylinder did not have glaze broken. Evidemtly rings moved enough for gap to lign up and that caused the oil usuage. Used for years and then sold at auction running. So things do not have to be as perfect as a lot seen to think.

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