piston rings 4 or 5???

truckinthumbtack · Sep 18, 2010

C-113 3" bore: My factory pistons that I am reuseing have 5 ring grooves. 4 compression and one oil. The piston ring set that I have just received in the mail have 3 comp and 1 oil. My question is this; what about leaving a groove "emty" say the third groove? Two on top, an emty groove then a compression ring in the forth groove, then the oil ring? What are yall"s thoughts on this. How about trying to salvage four of the "old" rings? Local Case/IHC dealer says The "never" made any five groove pistons. He supposedly called the factory and they supposedly researched it... So then can anybody explain why YT and others show five ring sets? This is a 1945 A distilate fuel model. Im only going to parade this thing mostly.

Bob · Sep 19, 2010

Give Dave Reed a call and ask his opinion.

410-398-7340

Check out the link below:
Rings

Jim Becker · Sep 19, 2010

My first thought is that they may be F-12 pistons.

robgIN · Sep 19, 2010

Some models used an extra ring groove in the industrial version. Possibility?

teddy52food · Sep 19, 2010

I would put 3 on top & leave the 4th groove empty.

truckinthumbtack · Sep 19, 2010

Thank guys! I sent an E-mail to ottos rings. So we'll see what comes of it. I will also call in the morning. Awesome resource to have! Very cool link! Thanks for the info!

Marv · Sep 19, 2010

I suggest you return them and get a different(correct) set. Farmall made several different sleeve, piston and rin sets for the 113 and 123 engines. Check the serial number on the side of the block and take the number to your supplier. Not all 113 and 123 engines are the same.

Andrew Z · Sep 19, 2010

Agree with all the responses here, Just as a funny note though when i took apart my fathers Super H, it was missing one of the rings on all pistons, yet it still had 145lbs of compression... never expected that.

Andrew

Owen Aaland · Sep 19, 2010

Having five rings on a piston was quite common. Usually there were three compression rings and two oil control rings. One oil control ring above the wrist pin and one below. As piston ring quality became better it was possible to maintain the same sealing ability with less rings. Each ring creates drag on the sleeve and piston so fewer rings means more horsepower available at the flywheel. The more rings on a piston the more wear there will be on the cylinder bore. Engines like the 3208 Cat only use two rings per piston but three per piston is much more common.

truckinthumbtack · Sep 20, 2010

Supposedly they looked it up by the serial number. Being IHC case has no record of the A ever being produced with a 5 ring piston, it makes sence these could be f-whatever pistons. Which I find highly improbable due to the condition of the tractor as I took it apart. However The factory could have used up some leftovers or something too, from what I gather by some of these other threads I have read. Anything could have happened since 1945 though!!

piston rings 4 or 5???

truckinthumbtack

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Bob

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