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1949 John Deere A model engine stuck

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Wayne

04-29-2003 17:09:31

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I have recently purchased an "A" John Deere i`m in the process of gettin it running after sitting 15 to 20 yrs. The engine is stuck, I`ve put diesel in both of the cylinders let it sit a couple of days and tried to pull it to get it unstuck, I`ve also put a big pipe wrench on the flywheel but still cannot turn it. any suggestions on how to get it unstuck? It seems like this engine is stuck for good. Any suggestions on this matter will be greatly appreciated.

Thanks in advance,

Wayne F.

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Dave K (Fl)

04-30-2003 10:36:52

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Re: 1949 John Deere A model engine stuck in reply to Wayne, 04-29-2003 17:09:31

I always shudder at the folks who try to unstick an engine by pulling the tractor! I know a lot do and sometimes it works. I just see too many that break up more things than they will ever save in costs. You just don't know what the internals of that engine look like or if valves are stuck, rocker arms etc. If you get it to run and it is full of rust what is the point?

I do agree with Jeff that how do you remove the block when one of those pistons is back too far to get at the rod caps?

Dave

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Jeff

04-30-2003 09:21:47

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Re: 1949 John Deere A model engine stuck in reply to Wayne, 04-29-2003 17:09:31

Where are all you folks coming up with "just remove the block and pistons together"? Last two Bs I messed with were froze so that you couldn't get to one of the rod cap bolts. Maybe you guys are just livin right and are lucky. I filled the cylinder full of Liquid Wrench for a month or so and put a bar on the flywheel. One came lose this way the other I pulled the head and scraped the rust and crap out of the cylinder then used copious amounts of Liquid Wrench and heat.

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Larry806

04-30-2003 19:23:42

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Re: Re: 1949 John Deere A model engine stuck in reply to Jeff, 04-30-2003 09:21:47

Jeff you unbolt the one you can get to & unbolt thr block Make sure you take off the oil line if it has one than rotate the crank & move the block & pistion together to get to the other rod Larry

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Kenny

04-29-2003 19:09:32

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Re: 1949 John Deere A model engine stuck in reply to Wayne, 04-29-2003 17:09:31

Wayne, I had an A last year that was stuck and I filled the cylinders with diesel and WD-40, and built a bracket out of scrap metal to fit the flywheel with a arm that is 6 feet long and tied a 100lb. tractor weight on the end of it and 3 days later the weight was on the ground and the engine was loose. Maybe this would work for you, good luck and like everyone else says you probably should rebuild it.

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Clooney

04-29-2003 17:55:18

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Re: 1949 John Deere A model engine stuck in reply to Wayne, 04-29-2003 17:09:31

Wayne, if it's stuck that bad you really don't want to run it even if you do get it unstuck. There is good chance you will do more internal damage by running it.
~The best approach is to pull the cylinder, pistons & all then remove the pistons.
~If those pistons are really stuck, the best way I have found to get them out is to pull the cylinder, then set it on some 4X4's with the rods pointing down, then put about an inch or so of diesel in the cylinders above the pistons, then light the diesel & let it burn out, then pour a little more diesel in, then try to drive the pistons out with a block of wood. If the first attempt fails do the procedure again. Those pistons usually come out with little damage... Try it you'll be amazed...

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Larry806

04-29-2003 19:07:15

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Re: Re: 1949 John Deere A model engine stuck in reply to Clooney , 04-29-2003 17:55:18

Mr Clooney I've never heard of that one. I know a guy that get's his old hog scalding kettel out builds a fire & boils water.He pours it through the motor till he can turn it over. He say's he's never had one beat him yet. I (trying to build a better mouse trap) Bought a LP fire burner. Got some steel pipe to plumb a small gear drive pump. Thinking I could boil a five (5) gal. bucket of water and pump it into the top of the motor and have a pipe coming from the block drain back into the bucket. Before I got everything finished for this project we had two or three stuck tractors. We ended up pulling the head's on and was darn glad we did. Rust, wasp nest, and everything else in the cylinders. They all had stuck valves and needed valve job any way. So I have since decided to always pull the heads instead of trying to knock them loose.

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John T

04-29-2003 17:21:27

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Re: 1949 John Deere A model engine stuck in reply to Wayne, 04-29-2003 17:09:31

Hey Wayne, If its stuck that bad, remove the valve cover and see if any valves are stuck. Then you may need to remove the rocker arm assembly, cuz if a valve is stuck and you happen to free the cylinders and the engine turns, you will bend the (*&^% out of the pushrods. If soaking with diesel or brake fluid etc etc etc still dont allow the flywheel to turn with rocking, Im afraid shes so tight when she does break free you may damage the cylinder walls or piston rings. Some people on here plumb up hydraulics to the spark plug holes and exert high pressure oil into the cylinders to try n free them up. If she ever starts to move, use back n forth rocking and go a lil at a time. If she refuses to budge, youre gonna have to break down and remove the rod caps and pull the block with pistons intact and then press the pistons out and hone or rebore as needed. Let us know. Ol John T Nordhoff in Indiana

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Bill

04-29-2003 17:18:08

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Re: 1949 John Deere A model engine stuck in reply to Wayne, 04-29-2003 17:09:31

Ive been there ; I think the best way is to take rods loose and take the block and all to machine shop and throw it in the cook tank, it will come apart, this way you will have it all apart to rebore etc, I have been able to get some tractors loose only to take them apart later to rebore etc because of pitted cyinder walls bad valves etc,,,My Cheap advice Billyiron

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