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Allis Chalmers Discussion Forum

AC - B

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01-29-2008 10:48:44

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I'm still waiting to receive my service manual but had a quick question on restoring a 1950 Allis Chalmers B. Is it possible or hard to remove and replace the cylinder sleeves in the block with it on the tractor. In other words, am I going to have to split the tractor and remove the entire block assembly to do this? Also, any good tools for doing this or procedures such as freezing or heating the sleeves. Thanks for any positive feedback or suggestions on how to go about doing this.

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01-30-2008 17:32:37

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 Re: AC - B in reply to 1951g, 01-29-2008 10:48:44  
Ok, thanks again for all of the replies. Looks like I"ll be removing the motor from the torque tube.

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01-29-2008 22:26:43

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 Re: AC - B in reply to 1951g, 01-29-2008 10:48:44  
I might do a basic ring job on an engine that I know to be otherwise sound, still in the frame. But to attempt a new sleeve "rebuild" still in the frame will likly turn into an expensive temporary patch that will 'bite' you later.
The work and effort on an engine still in the frame is far more than with it removed and on a stand or saw horses if nothing else.
Besides, with it out you can check out your clutch and cam bearings. Most people want to skip the c/b, and worn ones can realy weaken your oil supply.
Good wrench'n

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01-29-2008 16:32:21

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 Re: AC - B in reply to 1951g, 01-29-2008 10:48:44  
I am just finishing my B engine. I broke the engine from the torque tube, four bolts, plus the front end. I don't see how you could do it any easier than this. I think the shims alone would be cause, upside down, for some drastic action;. Good luck.................

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Dick Lemmon

01-29-2008 13:58:44

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 Pictures in reply to 1951g, 01-29-2008 10:48:44  
Here is a few pictures. You can find hundreds of pictures by going thru my site. Just click on the (public home) at the top. I can explain any thing about what is going on in the pictures and why the picture was important to take.

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01-29-2008 14:55:52

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 Re: Pictures in reply to Dick Lemmon, 01-29-2008 13:58:44  
DickL ;

How did you get that B engine so darn clean?

I'll have to try that.

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Dick Lemmon

01-29-2008 13:47:45

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 Re: AC - B in reply to 1951g, 01-29-2008 10:48:44  
So you spend all your time and money replacing parts. When you get done you will have these nice little seals and gaskets that didn't seem to go anywhere left over from the gasket set. Your all done and and she is running nice and purty like. You have all these sore arms and shoulders trying to get the shims correct and the red in your eyes from the oil drips but it sure was easier than removing the engine. You shut it off on a clean floor so pleased with your self with what you have accomplished. The next day you will start wondering where these oil drops came from. There will be a few drops up front and a few under the clutch. As the weeks go on the drops will turn into a small pool at both ends. If you were not over confident and ditch it you will go what was left of your gasket set and start to wonder which ones would stop the problem.
The engine has to be out to replace the rear crankshaft seal or remove and check the oil pump. Both very important in a actual rebuild.
A motor stand is the best bet but before I had motor stands I used a 55 gallon drum with a coupla short 2" X 12" on top. I could turn the engine any direction needed and still stand up where I could see. Who am I? Just an old fellow that has been thru any short cuts you could think up. Called school of hard knocks. I guess everyone could stand a few semesters so I will be watching your progress. Have fun it is a great hobby.

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Jeff Z.

01-29-2008 12:39:31

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 Re: AC - B in reply to 1951g, 01-29-2008 10:48:44  
With the engine out and on it"s side makes removing the cam easy. The lifters can be a pain with the engine upright.

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01-29-2008 11:38:59

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 Re: AC - B in reply to 1951g, 01-29-2008 10:48:44  
Ok, thanks for the information guys. I'd never restored one or for that matter any tractor other than JD so far so it's new territory to me as are the sleeves since JD uses the cast in block approach. Thanks again.

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01-29-2008 12:37:37

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 Re: AC - B in reply to 1951g, 01-29-2008 11:38:59  
I did that on a C, same engine as the B. I pulled the oil pan off and head off then took a 2X4 oak board and hammer and tapped them right out. Can be fun some times to get them started and its a good idea to lay a big rag etc. over the top so if the sleeve does jump it will not go flying out and hit the ground and brake. Not likely to happen but it can. Sleeves are also easy to re install

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Zac Breazeale

01-29-2008 11:36:45

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 Re: AC - B in reply to 1951g, 01-29-2008 10:48:44  
I did mine without pulling the motor off, just used a sleeve puller. i didnt think it was very hard at all.

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01-29-2008 11:27:45

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 Re: AC - B in reply to 1951g, 01-29-2008 10:48:44  
why would you want to replace the sleeves without removing the engine??? wayyyyy eaiser to do if you can flip the block over and there are only like 6 more bolts and the engine is off

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