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Allis-Chalmers 1939 B

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Key-Mho-Saw-Bee

06-17-2005 12:26:21




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I just bought a AC tractor. The previous owner said it was a 1939. I am quite excited! Where can I find info to keep it running and how to service it? The previous owner was adding Hydraulic fluid to the wheels. I doubt that this is what the manufacturer originally intended. This is my first concern before I use to any extent. Any help is welcome. This is my first adventure with an antique tractor.

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wdtom

06-18-2005 07:53:13




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 Re: Allis-Chalmers 1939 B in reply to Key-Mho-Saw-Bee, 06-17-2005 12:26:21  
Should have said " surf over to the AC page" for more Allis Chalmers info.



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wdtom

06-17-2005 17:31:04




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 Re: Allis-Chalmers 1939 B in reply to Key-Mho-Saw-Bee, 06-17-2005 12:26:21  
You have a great tractor. Hope you enjoy owing it, hang around here to learn more about ACs. As for your tractor. Adding hydraulic oil to the wheels??? Do you mean the tires, to make them heavier? Fluid is often added to tires to increase the weight and traction of the tractor, but hot oil, it will eat the rubber and cause a leak. If you were refering to adding oil to the fianl drives well that is another matter. The final drives are the final gear reduction at the end of each axle. To change it you remove the pan at the bottom, clean it, and re install it. Fill to the bottom of the plug with gear oil, 80-90 or 140 weight, whatever. This is a good thing to do, many times this oil is acient and really nasty. Same goes for the transmission, drain it with plugs on the bottom of the transmission and rear end, fill with the same 80-90 gear oil, unless your tractor has hydraulics, then fill with "tractor lube" or straight weight 20 or 30 weight oil. Grease the fittings on lthe front end too and change the engine oil and filter. As for the filter, make sure you get one with a perforated matal plate visible at the bottom and rag waste looking stuff inside with a wood pencil like peg sticking out the bottom. There are other filters around that will fit and are sold as replacements, but if they are not as described you will lose several LBS of oil pressure, search this site and read more. Make sure you keep a good boot on on the shift lever, especially of the tractor spends any time out in the weather, or water will find it's way down and into your transmission. Get and read reprints of owners manual and repair manual too, will help you to understand your new tractor. Again, good luck with it and hang out here and ask questions.

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Key-Mho-Saw-Bee

06-17-2005 18:22:51




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 Re: Allis-Chalmers 1939 B in reply to wdtom, 06-17-2005 17:31:04  
Thanks to Illinois Boy & wdtom. The hydraulic oil was added to the final drives - I did not know what they were called. This is a good start for me. I know NADA regarding tractors. I hope to restore it some. I plan to use it in my wood lot. I have a small lawn tractor, but it is useless in the mud and I need to remove the deck to go in the woods. The tranny on the AC B was also filled with Hydraulic oil. I will have to address that also. the front tires are modern auto tires. I wonder if the original front tires were solid rubber? The choke is a mess. There is no knob to open or close it. I have to hold it while I am cranking. I see manuals for sale. They seem pricy. Are they originals? Can I buy reprints at a more reasonable price?

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wdtom

06-18-2005 07:51:40




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 Re: Allis-Chalmers 1939 B in reply to Key-Mho-Saw-Bee, 06-17-2005 18:22:51  
Reprints are fine, worth it, especially if you are new to tractors. Another note, if you are going to be dragging logs or other things like pulling rcks. Never, but NEVER pull from anywhere but the center of the drawbar. Not way to one side, not from the rear axle, or from any lift mechanism there may be on the rear. Tractors can be easily rolled by pulling from too high up on the back. Pulling from the side can cause it to pull to one side, maybe not as hazzardous, but still not good. Always pull from the drawbar center. The front end of a B is light too. If you have a trailer of logs on the back with some good tongue weight and go up a good hill the front end can lift. You may want wheel weights on the front or some other weight. Loading the rear tires with a fluid made for the purpose will help overall stability, but give you even more traction which can also cause the front end to lift under hard pulling. I don't want to scare you, just pay attention here and be safe. Keep it in mind when pulling hard on something. The front tires were never solid I don't believe. Some Bs came with steel rears during the war when rubber was difficult to get, may have steel on the front too, but I don't think solid rubber ever. Auto tires are easy to get worn out for auto use, this is why you probably have them. Compact spare tires work too and are very reasonable at junk yards. I got one a while back for free as a matter of fact. Ribbed fribt tures turn easier, and may have more side grip in soil. Use what you have for now.

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Key-Mho-Saw-Bee

06-18-2005 08:54:47




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 Re: Allis-Chalmers 1939 B in reply to wdtom, 06-18-2005 07:51:40  
Thank you for the information. The towing warnings are appreciated. My first order of business is to put 80-90 oil in the finals and transmission. I want to begin by maintaining the parts that need lubrication and then working on the mechanical and finally the cosmetics. The oil bath on the air intake is leaking. I am not sure how to add oil or what kind. First I need to find and fix the leak.

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wdtom

06-20-2005 18:14:14




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 Re: Allis-Chalmers 1939 B in reply to Key-Mho-Saw-Bee , 06-18-2005 08:54:47  
The cup on the bottom of the air filter comes off, take it off, clean it, fill with oil to line or "oil" mark. I don't know off hand just what it is. Replace. Once in a while you may need to take off the whole air filter and rinse it with solvent. I won't say gas, but that works too. they get plugged with dust sometimes. Fill with solvent, shake, dump, fill again, shake, etc. Let dry, put back on tractor, put cup on bottom with clean engine oil, same weight you use in the engine.

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Key-Mho-Saw-Bee

06-21-2005 13:19:04




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 Re: Allis-Chalmers 1939 B in reply to wdtom, 06-20-2005 18:14:14  
wdtom thanks again for your help. I have purchased a owners and service manual. I am also looking into local tracotr enthusist. I bought a muffler. The current muffler is bouncing off the manifoil. I looked at the oil filter in the local supply. It does not seem to fit your discription. When I look inside the sides look like metal lath and there is a rubber piece in the middle. I will bring your description to them. Thanks again.

Henry

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Illinois Boy

06-17-2005 12:50:34




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 Re: Allis-Chalmers 1939 B in reply to Key-Mho-Saw-Bee, 06-17-2005 12:26:21  
Key-Mho-Saw-Bee,
Congratulations - and thanks for saving another piece of America!
Stay on this discussion board... lots of well versed guys on here - many will be familiar with your tractor.
You can probably find an owner's manual, etc under the link at the top left - Marketplace / Tractor Manuals.
Enjoy your machine...



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