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Allis Chalmers Discussion Forum

stuck allis WD

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Mark in oregon

05-16-2004 11:29:01

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Morning ,thanks one and all for being interested in these tractors and being willing to help someone new out. I Have recently aquired a WD that is in pretty complete shape looks good and holds alot of promise(I think).The first problem I have to overcome is a stuck engine. I have worked on smaller tractors(farmall cub) that were stuck,in the past I pulled the pan and put a jack on the crank at a cylinder that was mostly down and let is sit till it can free. I have been advised not to do this on the wd because of the weight of the tractor overall and the additional risk of bending the crank or rod. Is there extra risk? How would you get it unstuck. In reading this seemed to happen alot and after not as long of sitting as I would imagine. Need tips and assistance. Thanks Mark

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05-18-2004 13:08:13

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 Re: stuck allis WD in reply to Mark in oregon, 05-16-2004 11:29:01  
I know of guys that have had good luck with PB blaster.... I've been working on a Case myself with no luck on the culprit pistons as they are full of used oil and trans fluid so the PB can't do its thing... Also some guys have turned an old spark plug into a grease fitting and pumped the cyld. that way with luck (remove rocker arm) similar to the air... a grease gun can make a very large amount of pressure.

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05-17-2004 19:39:28

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 Re: stuck allis WD in reply to Mark in oregon, 05-16-2004 11:29:01  
Mark, you left out some important info, was tractor left outside with exhaust uncovered so that water could run into the cylinder through an open exhaust valve? If this is the case you have more problems than just a stuck piston, you also have rusty valves and valve seats. You will probably have to pull the head anyway, I would go ahead and pull the head. then you would know which piston was stuck, then concentrate on that cylinder. Put most of the penetrating oil in the cylinder.

Just my 2 cents. By the way Mark where are you located in OR. I am in North eastern OR, near Pendleton.

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05-18-2004 00:39:14

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 Re: Re: stuck allis WD in reply to Keith-OR, 05-17-2004 19:39:28  
Hi and thanks ,,,,I am in Keizer just out of Salem yea I am trying to wait till I get a service manual to dig in, was hoping to get it turning before the manual arrives. Got a spare Allis manual for the wd?

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Jerry Coulter

05-17-2004 18:32:45

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 Re: stuck allis WD in reply to Mark in oregon, 05-16-2004 11:29:01  
My dad was an AC dealer. He always said to soak a stuck engine with turpentine poured in the spark plug holes.

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Chris Brown

05-17-2004 15:19:00

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 Re: stuck allis WD in reply to Mark in oregon, 05-16-2004 11:29:01  
I did what you said one time with the jack, and when it came loose it took the ring lands off the stuck piston. If the head is still on you can pour in you penetrating concoction and use an air hose connector and a air compressor to force the lubricant past the piston,(you'll have to remove the rocker arms). I tried the hydraulic hose off another tractor plumbed into the spark plug hole and all that did was push the old head gasget out the side,it was still stuck. I ended up driving out the sleeve and all.

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Chris Brown

05-17-2004 15:21:39

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 Re: Re: stuck allis WD in reply to Chris Brown, 05-17-2004 15:19:00  
Sorry for the double post but I forgot. If you pull the piston and the sleeve together drop it in the barbeque grill,get it good and hot and usually it will turn loose and not hurt anything.

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05-18-2004 00:42:35

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 Re: Re: Re: stuck allis WD in reply to Chris Brown, 05-17-2004 15:21:39  
thanks had not thought of air pressure will try them all probably before it comes looose Mark

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05-16-2004 20:05:19

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 Re: stuck allis WD in reply to Mark in oregon, 05-16-2004 11:29:01  
I worked on two stuck WC engines for a year and a half. One I never did get unstuck. I tried soaking the cylinders with solvent and rocking the tractor. I took the head off and filled the cylinders with solvent. Took an oak 4 by 4 and rapped on each piston every other day and rocked the tractor. I finally pulled the engine and put it on an engine stand. Removed the crankshaft and pulled the three free pistons. I turned the engine top side up. Used a chain anchored to the head bolts, the 4 x 4, and a hydraulic jack to break the offending piston loose. Actually it didnít take a lot of pressure with the hydraulic jack to break the piston loose.

This engine appeared to have been overhauled shortly before an exhaust valve seat dropped and locked the valve open. Had I had not wanted to save the pistons and sleeves I would have pressed them out as a unit from the bottom and replaced them with an overhaul kit.

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05-16-2004 16:58:42

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 Re: stuck allis WD in reply to Mark in oregon, 05-16-2004 11:29:01  
I would take the spark plugs out and squirt wd40 or kroil or some kind of penetrating oil in to each cylinder and let it sit for a day or two, then try to break it loose.

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05-16-2004 17:58:22

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 Re: Re: stuck allis WD in reply to ron, 05-16-2004 16:58:42  
after the kroil, then jack one back wheel 2 inches off the ground. put the transmission in gear and "rock" the rear wheel back and forth every day. fit aint stuck too bad, it will let go in a week. if not, pull the head and pan and work each cylinder individually with an oak 2 x 4

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05-27-2004 17:03:21

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 Re: Re: Re: stuck allis WD in reply to steve, 05-16-2004 17:58:22  
She is unstuck!!!!!!! now to find oversized pistons and rings!!!!!!!!THANKS

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