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Allis Chalmers Discussion Forum
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Resleeving a C

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Jason Howard

01-29-2004 11:27:44




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I own an automotive repair shop. One of my customers came in yesterday wanting to know it I was interested in doing a complete overhaul on his C. He said it has been using oil for years and he is tired of it. Problem is I have never worked on a sleeved engine before. Is this something that can be done in frame or will I need to split it and send it to the machine shop and have them pressed in?

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tom davison

01-30-2004 09:38:21




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 Re: Resleeving a C in reply to Jason Howard, 01-29-2004 11:27:44  
YOu have to be careful removing the sleeves. You may end up cracking the top of the block between the cylinders. A puller is more suitable in my opinion.



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Dave R (MN)

01-29-2004 20:09:25




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 Re: Resleeving a C in reply to Jason Howard, 01-29-2004 11:27:44  
When you put the new sleeves in lube the O rings good with vegatable oil. Don't use motor oil because it causes them to swell up. After you put the pistons in, bolt a flat iron across the sleeves using the head bolt holes to hold the sleeves in before you flip the motor over or they could fall out. (Had this happen before) If your charging the guy by the hour, it will probably be cheaper for him and easier for you to take the block to a shop and line bore the mains and they can do the rods too so you can do away with the shims as they are pretty time consumming.

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wdTom

01-31-2004 19:18:17




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 Re: Re: Resleeving a C in reply to Dave R (MN), 01-29-2004 20:09:25  
Engine oil can't do much damage to the O rings, oil from the crankcase contacts the lower one.



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Kent of SW MO

01-30-2004 13:15:59




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 Re: Re: Resleeving a C in reply to Dave R (MN), 01-29-2004 20:09:25  
When I worked at an Allis dealer year ago they used white lead on the O-rings. Later when we resleeved Dad's 190-XT the instruction was to use motor oil on the sleeve O-Rings because the swelling is what made them seal. Clean the hole in the block clean enough where the sleeves will turn easly in the bore, then install the O-Rings on the sleeve, oil the O-Rings and quickly install the sleeves in the block.

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wdTom

01-29-2004 18:28:48




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 Re: Resleeving a C in reply to Jason Howard, 01-29-2004 11:27:44  
I would pull the engine. Dick L's advise is good too, he knows this tractor. Shimming is a long process to do it right, as you no doubt know you need to maintain proper "crush" while reducing the shim pack to get proper clearence, by carefully and evenly filing the bearing shell. Owning a machine shop you can remachine the rods and mains for a more modern fit, do away with the shims, if you want. If you shim just keep in mind it will take a while to do it right, one bearing at a time. Using plastigage to keep on track.

And on the liners, make sure the sealing surface for the O rings is right, no rough spots to rip the new rings and lube the new rings to help them slip in.

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steve

01-29-2004 15:54:43




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 Re: Resleeving a C in reply to Jason Howard, 01-29-2004 11:27:44  
Ill vote with dick on this one. It only takes a couple hours to split the motor from the bell housing, since the tractor has no frame. Then you can put it in a regular engine stand, pull head, flit it and pull the crank and pound out the sleeves. This is a "wet" sleeve motor, so the only things holding the sleeve is a couple of 50 eyar old o-rings. With it upside down you can clean all the water jacket, hone where the o-rings seal, etc. As dick said the crank bearings are not machined to exact clearance. You put up to .006 shims under the bolt heads to get the bearing clearances (about .002 clear). This would be a real joke laying on your back looking up. Its a nice job working on a simple 4 banger, you will llike it.

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Dick L

01-29-2004 12:47:33




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 Re: Resleeving a C in reply to Jason Howard, 01-29-2004 11:27:44  
You can change sleeves with removing the engine but you will not be able to put in the new rear crankshaft seal with splitting the tractor and removing the flywheel. If you are not planning on using the old sleeves you can drive the old sleeves out by turnning the block upside down and using a steel bar on the edge of the sleeve drive it out. I only take about a half hour to do this on the real stuck sleeves. Most of the time a coupla stiff raps and they fall out. I have relpaced bearings with the engine in the tractor but the time spent trying to shim the bearings will be longer than the time to split the tractor. Shiming the bearing with the engine on an engine stand is the way to go. I have pictures of most of the steps by looking thru out the site. I have a disasembly ?? album as well. After looking at these pistures just click on public home and search.

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Dick L

01-29-2004 12:49:08




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 Re: Re: Resleeving a C in reply to Dick L, 01-29-2004 12:47:33  
In the first line it was meant to say (without removing the engine)



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