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Farmall & IHC Tractors Discussion Forum
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Pistons

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Johnny

10-24-2003 05:41:39




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Well, I got the Farmall 100 unstuck and the pistons in a bucket. But the rings are compressed even with the side of the pistons. Should'nt they be sprung out a little? If so what is the best chemical like gas and a wire brush or what do you suggest.




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steve

10-24-2003 18:01:43




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 Re: Pistons in reply to Johnny, 10-24-2003 05:41:39  
carefully pry out the rings, even break in little pieces. they are no good. you need new ones. after you break them out, file or sand lightly the groove width so the new rings will have a slight clearance. if you try to save the rings, you will burn oil forever.



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Eric

10-24-2003 15:28:39




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 Re: Pistons in reply to Johnny, 10-24-2003 05:41:39  
If you dont plan on keepin the rings, just take a screwdriver or chisel slightly smaller than the width of the ring and pry it out. Take care in not being forceful against any part of the piston itself. Also be careful in that when the rings break, they tend to become airborne with some force.



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Dan in Ore

10-24-2003 11:10:03




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 Re: Pistons in reply to Johnny, 10-24-2003 05:41:39  
I would hit it with a wire wheel on an angle grinder and then maybe some heat. While they are still warm (not hot) spray them with a penetrant like PB Blaster. Let them set for a few days and keep spraying with the penetrant. You may even TAP then with a brass hammer to try and free them up. Just use common sense instead of force and you should be able to at least save the pistons. Be extremely careful not to exert too much pressure on the lands in between the ring grooves, these break real easy. Keep in mind it took several years to get this way and it will take more than several minutes to undo this. Just what I would try.

Dan

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Dan

10-24-2003 06:26:58




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 Re: Pistons in reply to Johnny, 10-24-2003 05:41:39  
I think I would replace the rings. Yes they should spring out a bit. May just be stuck in the grooves from carbon and rust. Try soaking for a while first. Kerosene is a good solvent but think others are better but more expensive.



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Walt

10-29-2003 05:16:27




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 Re: Re: Pistons in reply to Dan, 10-24-2003 06:26:58  
Once you get the rings out, clean the grooves. A broken ring usually does a good job as a scraper. There are tools available for this job also. Make sure the new rings are free in the grooves or you will have problems. Good luck



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