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Burns

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unstyled

01-02-2002 19:30:07




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Needed jd advice.Ihave a old a 36 and want to get a little bit bigger motor.Ive heard that a crank from a 1941 and newer tractor 1/4" will fit.What all will i need from doner.crank,rods,pistons.What else i have accese to a pair of tractors.




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Todd

01-03-2002 05:47:26




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 Re: burns in reply to unstyled, 01-02-2002 19:30:07  
You can use a crank from a 41 - 46 A to gain the 1/4" of stroke. I would use the rods, but the piston will be the same more than likely. High compression aluminum pistons with the crank will give you around 30 hp. Switching cams will help a little also. I noticed on some of your G pictures the tractor had front steel wheels. Do you still have them and want to sell them.



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burns

01-03-2002 03:40:16




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 Re: burns in reply to unstyled, 01-02-2002 19:30:07  
At serial number 488000 in the row crop line and 260001 in the AR, AO, AI models, Deere added the 321 cu in engine. The rated hp went up approx 13-14 hp. I'm not going to be helpful by providing a list of part numbers. But you will need the major parts, block (A2324R), head (2325R), crank, pistons/rings/pin, rods.

Something else that I am curious about is the reduction gear. The late A is equipped with different size clutch pulley and first reduction gear. Compared to a 48 A, the clutch pulley has a two teeth smaller gear and the reduction gear is two teeth larger. I am not sure if the later gears will fit the unstyled tractors. Something to watch is that some first reduction gears on the late A had different internal setups. Some were keywayed and others splined.

Sorry I wasn't more helpful.

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Todd

01-03-2002 05:53:59




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 Re: Re: burns in reply to burns, 01-03-2002 03:40:16  
I asked you a question in my first post above, but put it in the wrong place. Do you still have the front steel that was on your G when you first aquired it ? The late A clutch and first reduction gear installed on the fast A's will slow 1st gear down about a 1/4 mph.



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burns

01-03-2002 07:32:15




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 Re: Re: Re: burns in reply to Todd, 01-03-2002 05:53:59  
The tractor was purchased from an amish gentleman who wanted the wheels back so that his current tractor would be steel all around. I can tell you that they are not Deere wheels. They were a basic wagon wheel that had adapter plates welded to the center.



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DP

01-02-2002 21:12:33




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 Re: burns in reply to unstyled, 01-02-2002 19:30:07  
Good evening Burns! I used to have a 37 A and pulled it a little. I had overhauled it and went .090 over with late A gas pistons, and a gas manifold. The rear flat spoke wheels were poured full of cement, and when weighing in with a short amount of gas it hit the scales at 5000 pounds. I don't remember ever powering it out. The nice thing was I used it at home all the time too. Wish I still had it!

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unstyled

01-03-2002 15:59:10




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 Re: Re: burns in reply to DP, 01-02-2002 21:12:33  
do you guys think i should take the flywheel and pulley.how about the main bearing houseings.i can get all the motor parts thought i dont think the block will fit.



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burns

01-03-2002 19:55:33




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 Re: Re: Re: burns in reply to unstyled, 01-03-2002 15:59:10  
The foot print of the block to the crankcase and the stud placement on all A blocks are the same. The A426R gasket was used throughout the production years.

Why not install the unstyled front end/sheet metal to a mid series or late A. The correct police may bark but the last time I checked sheet metal did not add more HP. Of course unless it is really shiney and waxed. (Wax on==Wax off)



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WTW

01-04-2002 06:49:20




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 Re: Re: Re: Re: burns in reply to burns, 01-03-2002 19:55:33  
Burns, Better study your lesson on that comment, better yet look at your parts book. 1946 and older was the first bolt pattern, 1947 - 1949 was the second pattern (same amount of studs different pattern) and 1950 through 1952 and all Model 60 John Deere tractors were the third pattern (one more stud in pattern). Parts book will show the different gaskets. Later Dave W.



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burns

01-04-2002 15:32:50




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 Re: Re: Re: Re: Re: burns in reply to WTW, 01-04-2002 06:49:20  
I think you may have a different gasket in mind than what I do. I have always been under the impression that all A blocks were interchangeable. I do realize that the heads do not interchange and that is why I recommend both head and block be used from the donor tractor. The gasket I am talking about is the gasket between the block and the transmission. Because this gasket was used on all models that would show that the blocks are interchangeable. According to the PC 674 parts book for the 410000-476999 A's. On page 64 both gasket kits include the same cylinder to case gasket. On page 8 of the same book No. 1D is the same gasket. All identified as being used in (410000- ) tractors. In the PC 675 parts book, page 10 and page 140 show the same A426R gasket.

I am not trying to be argue but to simply make a simple clarification for Unstyled. You certainly know your Deere info and if I am wrong then I apologize.

By the way, do you know if the late A (50-52) pulley and first reduction gear would be compatible with the unstyled tractors. Would you need to change the crankshafts if you didn't want to.

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WTW

01-06-2002 08:20:50




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 Re: Re: Re: Re: Re: Re: burns in reply to burns, 01-04-2002 15:32:50  
burns, Maybe I took your comment wrong when you said (all) John Deere A's were the same. I didn't catch that you were referring to just unstyled tractors only. 476999 and older are all the same but they are 1938 and older We are referring to the same gasket maybe not All A's up to and including 1952. My apologies if I took your message wrong. Concerning your question on the clutch pulley and first reduction gears, The late pulley will not fit the old cranks. You can swap gears from pulley to pulley and reduction gears from late to old or visa versa, just keep them matched up like intended. The late model A's with the creeper low transmissions have the slower gears at the pulley and first reduction. The pulley gear is two teeth larger and the reduction is two teeth smaller. It will slow an old A down about not quit a half gear. You can switch them the other way as well if you want to speed a late one up a little. Here is the problem that you will find when doing this, some late A's had a keyway in the first reduction shaft and gear verses the spline. You have to find the late tractor with the spline set up to make this happen and then you will be ready to swap. You will never know for sure as what the late tractor might have in it until you take it apart as parts and repairs over the years have really mixed these up. I have taken down allot of salvage tractors to find the spline type reduction gear to only find the key type. Once you find the spline type on the late A your in business as the spline is the same as the old tractor. The clutch pulley gear is pressed on and you will have to pull it off heat it and drop it back on the next pulley. Good Luck Hope this is the information you wanted. Dave W.

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Todd

01-05-2002 10:05:22




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 Re: Re: Re: Re: Re: Re: burns in reply to burns, 01-04-2002 15:32:50  
No he is correct in what he is saying. He is referring to the block - crankcase attaching. I've been through this before also. Tried to put a block from a 51 in a 48 - had a extra stud. Yes those belt pulleys and reduction gears will work in a unstyled - have one sitting here. It will slow it down 1/4 mph.



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burns

01-05-2002 20:28:22




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 Re: Re: Re: Re: Re: Re: Re: burns in reply to Todd, 01-05-2002 10:05:22  
Sorry for sending the discussion the wrong direction thanks Todd and Dave for the clarification.



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John

01-03-2002 18:54:38




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 Re: Re: Re: burns in reply to unstyled, 01-03-2002 15:59:10  
no, the bolt pattern is diff. but, just bore it out .045 aluminum and put the crank in and it should be good!!
John



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