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Harry Ferguson Tractors Discussion Forum
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TO-20 rings

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Clint

08-16-2004 15:28:23




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After thinking that I would remove the head on my TO-20 and have a valve job done I decided that I would put new rings in too. Before I take out the pistons I would like to order all my parts so how or what is the proper size ring for this tractor assuming it has never been rebuilt before, also the machine shop that I took my head to is wanting the year built of my tractor and my serial # is TO-6992 I wasnt able to figure out the year from the links to the left so any and all help would be greatly appreciated.

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gshadel

08-17-2004 08:11:25




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 Re: TO-20 rings in reply to Clint, 08-16-2004 15:28:23  
Clint, Man, I just went down that road last Winter... started out as a valve job and new rings... ended-up doing a total rebuild... and had fun doing it.

Suggestions: 1. If you don't have a manual, get one before you spend any money on parts. 2. Pull the pistons before you order rings. You need to measure the ID of the sleeves to get the right rings anyway, check for scoring, & check for out of roundness(it probably wouldn't be a show stopper to skip the out of round thing unless they are super bad). Your manual will have all those spec's. Also need to check the ring grooves on your pistons for wear. When I pulled my pistons, 2 pistons had broken rings, they had chewed-up the ring grooves real bad, all the grooves where worn way past tolorance anyway. You can't see any of that while the pistons are in the engine. 3. I ended-up getting new sleeves/pistons/rings. They all come in matched sets. It might sound like a big job, but it's not, it doesn't take much more time than just doing rings. With the sleeves there is NO honing, measuring, checking ring gap, cleaning pistons, etc. 4. I wasted money on extra gaskets because I didn't know what was in the different sets out there. I recommend just getting the rebuild gasket set even if you are just doing rings. The set is ~$35 for everything. You won't need the "valve grind set" or any other set. You will pay more than that if you just buy the head, pan, and valve cover gaskets separately. 5. Check around several places on prices, they vary a lot. I got several parts from this web site, but got parts from several other places too. 6. Don't matter if you do rings, or sleeves, all of it can be done without pulling the engine.
Keep us update, good luck!

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Clint

08-17-2004 18:23:35




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 Re: TO-20 rings in reply to gshadel, 08-17-2004 08:11:25  
Well after pulling the pistons and taking a not so hard look I have decided that I am going to resleeve the engine and do everything else except main bearings, the only question is when I buy the new sleeves can I keep a bore of 3 3/16 or will it increase.



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gshadel

08-18-2004 09:06:37




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 Re: TO-20 rings in reply to Clint, 08-17-2004 18:23:35  
All the sleeve kits I see are the oversized sleeves with 3 5/16 bore. The sleeve kit comes with pistons,rings,pins,O-rings,and retainers. Only thing you need from your old hardware are your connecting rods.

After hearing re-sleeving horror stories from Ford guys, I thought it would be a tough job. But these Continental engines are A LOT easier to re-sleeve than a Ford. Once I figured out how to do it, I was suprised that I had them all out within an hour. Once the initial seal is broken, you can pull them out by hand. Those old sleeves can be pushed up from the bottom or pulled from the top with the crankshaft still in place.

Check around on prices, I ended up ordering a rebuild kit through a MF dealer because they didn't charge me shipping. Keep us updated!

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Duner Wi

08-17-2004 18:34:28




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 Re: TO-20 rings in reply to Clint, 08-17-2004 18:23:35  
The aftermarket seems to have gone to 3 5/16 bore.
MF might be able to get you the 3 3/16 parts. If it were mine I would put in the mains also and there are 2 different set up on the front main that takes the thrust. Back when you had a choice of bore size the std. size always seemed to cost quite a bit more than the over size.



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Justin-PA

08-17-2004 07:34:31




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 Re: TO-20 rings in reply to Clint, 08-16-2004 15:28:23  
See the link below. You have a 1949 model.



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Duner Wi

08-16-2004 19:45:23




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 Re: TO-20 rings in reply to Clint, 08-16-2004 15:28:23  
The original bore was 3 3/16. After market supplied 3 1/4 and 3 5/16.



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Al in BC

08-16-2004 16:07:40




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 Re: TO-20 rings in reply to Clint, 08-16-2004 15:28:23  
Clint.

I would take an educated guess and say that it was a 1949. Maybe someone else has a better idea.

Al in BC



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John in MD

08-16-2004 16:35:32




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 Re: TO-20 rings in reply to Al in BC , 08-16-2004 16:07:40  
Your TO-20 is a 1949 model. It should have a Continental Z-120 engine (120CID). The engine will have a plate rivetted to the block. REMOVE the plate before you have the engine hot-dipped if you go this far in the rebuild. The plate is irreplaceable and will corrode. Good Luck.



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