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41JD model A?

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rob nickel

08-24-2004 10:55:11




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Am currently working at freeing up my stuck 41 A and have done as suggested here on this fine site and filled up the cylinders with a mixture of trans fluid and penetrating oil as well as having had the crankcase filled with diesel for the last 6 month's or so. Still no luck in turning that big old flywheel though and I'm about to run out of time before I absolutely have to have this thing running or else. Anybody with some new info on how to best get this old girl to spin again? The tractor ran fine before it sat out for the wet west coast winter a few year's back, and even though I took the precautions of covering the stacks and magneto to keep out the rain it would seem it got wet inside anyway and now will not turn over at all anymore. Is it ok to try to carefully pull this machine in order to hopfully free up the engine, or will this only cause me more costly problems by bending something on the inside? Also? How do you get the mixture in the cylinders out of there again, once you've filled them up but it hasn't loosened the pistons, as planned? What I have been doing is going out to rock the tractor while having it in high gear most every evening for about the last month now by simply pushing against the rear wheel's by hand. No luck using this simple method just yet however and it seem's to me a little more persuassion is needed? Like perhaps a gentle tug down the street with my pickup truck and a buddy and one long rope? Just don't want to end up bending a rod or worse and was hoping that somebody out there might have a better idea for me? Thank's for now and thank God for sites on the net such as this one and for all you guy's out there that are so willing to help all of us involved with old tractors and so badly in need of this help.

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rob nickel

09-03-2004 08:56:16




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 Re: 41JD model A? in reply to rob nickel, 08-24-2004 10:55:11  
Thank's guy's for all the valuable advice. After messing with this thing a bit more however, I'm kinda beginning to think that my problem here is possibly clutch related istead of or as well as a stuck piston or two? Took off the top crankcase cover yesterday and had a look inside. Practically no rust anywhere in there and it look's surprisingly clean. Noticed that the clutch lever wouldn't pop into place when trying it though? And now wonder if in fact a frozen plate or two might be the problem? Could anyone tell me what the procedure might be for pulling out the clutch plates and then properly re-installing everything once the parts have been cleaned up? The engine had gotten harder and harder to turn over by hand back before I'd parked the old A for the winter. Almost as though I'd been winding up a giant rubber band by cranking over the flywheel,Until finally she wouldn't crank at all anymore. Could it be that I'm on the wrong track here and what I've really got is a piled up bearing in there somewhere?

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johndeereman

08-24-2004 21:06:20




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 Re: 41JD model A? in reply to rob nickel, 08-24-2004 10:55:11  
just get it done and over with and pull the block its easiest to do and youre gonna have to check the cylinder walls for pits anyway or youlle tear the rings out then youle pull the block



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Joe

08-24-2004 14:50:03




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 Re: 41JD model A? in reply to rob nickel, 08-24-2004 10:55:11  
I've had good luck by making sure that the valves aren't stuck, then removing the crankcase cover and loosening the rod caps. It will then have some play at the flywheel. Rock it back and forth, using the jarring motion to loosen the pistons. I've used this method on several A's and even a D. They have all run afterwards.



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John T

08-24-2004 14:41:32




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 Re: 41JD model A? in reply to rob nickel, 08-24-2004 10:55:11  
Rob, Im afraid it sounds like youre gonna have to end up pulling the block but heres methods myself or some buddies have gotten to work.

Similar to what you have already done, I have filled the cylinders with a witches brew of diesel plus brake fluid plus some auto tranny fluid etc., then removed the valve cover n rocker assembly so you dont bend any stuck pushrods n try n see if the valves will tap/shock/vibrate to close???? then one friend uses adapters and plumbs up hydraulic lines to the plug holes and applies some hydraulic pressure, but that sort of depends on where the pistons at in its stroke and the valves. If you can get a cheater to rock the crank/flywheel or try some pulling you may move things?????

If you have to pull the block, fill the cylinders with that witches brew after a good soaking with PB Blaster or Kroil etc first and after a few days in the brew a good solid oak block and sledge ought to drive the pistons loose maybe???

Sorry, theres no easy or always works or perfect correct answer to this one, you have to try the fluids then the heat n shock n beat probably.

let us know, Good Luck n God Bless

John T

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Clooney

08-24-2004 11:23:01




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 Re: 41JD model A? in reply to rob nickel, 08-24-2004 10:55:11  
Rob, chain or bolt a 6 foot 2X4 or better yet a piece of steel across the flywheel using the 2 large flywheel holes, then use a fairly gentle rocking motion.. If that doesn’t free it, run [or pour] about as hot of water as you can into the block cooling system & try the above again..

If the above doesn’t free it you would have to pull the block off shortly after start up anyway so you might as well do it now & save the pistons & possibly the bore from damage..

Pull the block off.. pistons, rods & all— Then stand the block on 4X4’s with the rods hanging down,, then pour about ¾” of diesel fuel into one cylinder at a time & light it on fire [do the above outside please],, Then let it cool a little & use a block of wood & big hammer to drive the pistons down & out.. If the pistons don’t move the first time [or get tight & hang in the bore] do another burn.. Within a few burns those pistons will more than likely move.. If by chance they don’t move after a few burns you have enough rust & damage in that bore that it probably isn’t savable without a re-bore & new pistons anyway..

I have removed many stuck pistons with the above method & have had very good success using it [better than a press or any other method I have ever tried] ..

Let us know how you do?

JDClooney@aol.com

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Mike M

08-24-2004 11:22:32




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 Re: 41JD model A? in reply to rob nickel, 08-24-2004 10:55:11  
There's always a chance of doing more damage when trying to free up a stuck engine. But here's what I'd try and it has worked to get some running in the past. Ok cyl. have been soaking,pull off the valve cover and remove the rockerarms and push rods so they don't get bent or broken,try to push in the valves one at a time and see if there stuck,if there stuck try to free them up ,if not stuck things just got better.Leave out the spark plugs so your fluid has a place to go then I would chain a bar to the fylwheel and try turning it,if it moves work it back and forth until it goes all the way around.Someone once told me that they used a come along and wrapped it around the flywheel and pull from the rear axle I have never tried this method yet.If you can't get it to move you are looking at pulling the block out with the pistons still in it,then stand it up and drive them out with a block of wood and a sledge.

If you get it to move without pulling the block out you can pump out the fluid by hooking back up the valve train and leave out the spark plugs then pull it around in high gear or belt it up to another tractor. I do not like to pull them around when stuck as you can break the trans.if you can even get the tires to quit sliding.

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