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Case Tractors Discussion Forum
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Freeing up Case L engine

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thehickdaddy

03-22-2006 21:51:35




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Ok, so my late uncle had this 1935 Case L. Ran great with a 4 spd LA trans, and a 4 3/4 bore. Ran great right until my cousin caught the straight pipe exhaust on a limb on the opening round of a field and broke the exhaust manifold. so my uncle decides, while the tractor is already down, lets grind the valves, maybe finally put on that extra high compression head on it. my uncle passed away and the tractor sat, with the head off, under cover, for about a decade now. Now the engine is stuck. I have tried soaking the pistons with everything from diesel, to atf, to Esenshulube. to no avail. i have towed the tractor. i have jacked up one wheel and put it in 4th gear and slapped the rear wheel back and fourth. i have beat on the pistons with a block of wood and hammer. Now i need more suggestions on breaking it free without breaking the alluminum pistons and or ring glands. Do you think that the aluminum pistons have chemically, electrolissesed themselves to the sleeves? should i pull the sleeves out and tried to press the pistons out, or just cut the sleeves off and try to find new big bore sleeves? i have not tried the grease gun method. any help is appreciated. just trying to keep one more good Case alive. this one has been in the family since 1963, and was my late uncles high school shop class project. thanks, thehickdaddy

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tomturkey

03-24-2006 06:08:25




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 Re: Freeing up Case L engine in reply to thehickdaddy, 03-22-2006 21:51:35  
I don't believe that I have read DCTom's method. Would someone please post the procedure. I think I have a stuck tractor motor in my future.



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Case1950

03-24-2006 17:04:46




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 Re: Freeing up Case L engine in reply to tomturkey, 03-24-2006 06:08:25  
I will try to explain DCToms method. I have used it several times and it does work well.

Get a old spark plug and break all of the porcelan off. Weld up the hollowed out spark plug to a hydraulic hose fitting, and install in a cylinder with the valves closed and piston near the top of its stoke. Hook hose up to another tractor with hydraulics and apply pressure and usually the engine will turn right over. You may have to do this a couple of times on differnt cylinders before you can turn the engine by hand.

I have done this on 2 Case DC tractors and both are running today. I didn't tear anything up and never went into the engines afterward. Just try to get most of the oil out by turning the engine over with the spark plugs out afterward.

Case1950

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bjb in NE

03-23-2006 08:25:06




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 Re: Freeing up Case L engine in reply to thehickdaddy, 03-22-2006 21:51:35  
In my short time working on tractors (im only 20) i have removed stuck piston from two engines now. One was from a WC and the other an F-140 Continetal engine from a Massey 35 sp combine. The only way i got those pistons free was to remove the crank and then use either wood or a large piece of brass to start driving the pistons back and fourth slowly. You will be unable to put enought torqe on the crank to move one let alone all four pistons. And with all four attached to the crank the force that your are applying to one pison is being distributed to all four pistons. Pulling the crank will allow you to concentrate the force on only one piston at a time.

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old

03-23-2006 08:20:50




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 Re: Freeing up Case L engine in reply to thehickdaddy, 03-22-2006 21:51:35  
Well if its out side or you can get it out side. Fill each cylinder 3/4 full of tranny fluid turpentine etc. Then put in about a table spoon of gas. Step back and with some thing long so your safe light the gas up. What that does is heats the block but the piston keep cool. I had a MM-RTU that I had soaked for more then a year and it would pop loose, till I pulled the head and did the gas trick. I popped loose after that and then I put the head back on and tuned it up and drove it away. Didn't even smoke of use oil.
I'm about ready to do that to another tractor if it has popped loose in the next couple days

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Ken in AZ

03-23-2006 07:09:08




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 Re: Freeing up Case L engine in reply to thehickdaddy, 03-22-2006 21:51:35  
Having just recently removed the sleeves from a 1940 D, I can say that temperature helped my situation a lot. I would guess that you'll need something along the lines of your block of wood to spread the stress out on the pistons, a constant supply of force (such as a hydraulic jack), and a way of cooling the piston while heating the block.

In my case it only required heating the block while I had the pressure against the sleeve; they started to move after the engine came up above room temperature a few degrees. In this case you might have to get a little more creative, such as dropping in dry ice and pouring rubbing alcohol on it to transmit the heat a little better. This might require flipping the block over (to put the ice on the bottom of the piston and the jack against the top, for instance) and that may not be possible with what you have for tools and facilities.

If it helps at all, I got a cheap propane torch from Harbor Freight that is great for this kind of thing... you just have to turn it down enough to not knock the paint off everything around you. It was something like 20 bucks and worth it in saved knuckles and swearing.

Hope this helps.

Ken in AZ

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Tom Railsback

03-23-2006 06:36:47




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 Re: Freeing up Case L engine in reply to thehickdaddy, 03-22-2006 21:51:35  
You might try putting a piece of dry ice on top of the piston; this will cause the piston to shrink and brea free of the sleeve wall. It worked for a friend of mine on a Farmall M.



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dctom

03-23-2006 08:40:50




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 Re: Freeing up Case L engine in reply to Tom Railsback, 03-23-2006 06:36:47  
Tommy; guess no one likes my hydralic method but i have broke a bunch of them(all colors) loose with it hummmm tom



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Case1950

03-23-2006 18:15:15




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 Re: Freeing up Case L engine in reply to dctom, 03-23-2006 08:40:50  
I have used Tom's hydraulic method several times and couldn't be more easier. Makes a heck of a mess, but I don't even break a sweat.

Case1950



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CK RICHARD

03-23-2006 16:23:20




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 Re: Freeing up Case L engine in reply to dctom, 03-23-2006 08:40:50  
tom I've used your method it works great.



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Tom Railsback

03-23-2006 14:34:33




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 Re: Freeing up Case L engine in reply to dctom, 03-23-2006 08:40:50  
Tom:

I simply forgot your method this morning when I posted my suggestion. Sorry.



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JDB

03-23-2006 10:33:31




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 Re: Freeing up Case L engine in reply to dctom, 03-23-2006 08:40:50  
Tom,

Heard you talk about this before. I would try it if I had a stuck engine.



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