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OrangeTractorPower39 
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 Topic: 1939 Allis Chalmers B serial numbers
Posted: 08 Jul 2021 at 2:28pm |
So I have this 39 Allis Chalmers B, and I would like to know if the engine, torque tube, and transmission are the original from factory or if they have been replaced. The tractor serial number is AM-21562, the engine serial (I think this is the correct location for it) above the flywheel is BE-21778-G (not sure what the G means though) Left side of the engine next to the oil filter is AM-2916-11 and another one is kind of behind the clutch pedal which is AM-2961. The rear end serial number is AM-2787-1 and AM-2787-2. Also there is a precarious looking serial number on the block between the oil filter and somewhat behind the magneto, it said D28X thats the one that stumbles me the most. I have know idea what it means, I thought the D and X meant Deluxe but I don't recall A/C making anything titled with Deluxe. I hope this helps, I have pictures if anybody needs them. Thanks! -Kaleb.
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OrangeTractorPower39
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Posted: 08 Jul 2021 at 2:52pm |
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Oops I made a mistake on the serial number AM-2961 I forgot to add the -11 so its AM-2961-11.
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Jim.ME
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Posted: 08 Jul 2021 at 3:11pm |
Your description of the numbers beginning with AM, sounds more like casting numbers than serial numbers. If the numbers are raised from the surface they are casting numbers, serial numbers are stamped in. There were likely hundreds and thousands of a given casting number used. The BE number stamped on the back of the block, above the flywheel is the engine serial number.
The tractor serial number will be stamped in an area just forward of the gear shift pattern casting. Tractor No will be cast right forward of the flat spot the actual serial number is stamped in.
I very much doubt there is a way to tell if all the components are original, as you are seeking.
Edited by Jim.ME - 08 Jul 2021 at 3:14pm
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steve(ill)
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Posted: 08 Jul 2021 at 3:18pm |
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The BE motor serial number means it was made probably before 1940.. When then came out with the C tractors, the motor became a CE and was stamped on the flywheel area, not on top of the back face.... Serial number of the tractor, as mentioned should be by the shift lever and be B xxxxxx........... we can tell you from that, what year it is.
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Like them all, but love the "B"s.
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steve(ill)
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Posted: 08 Jul 2021 at 3:36pm |
MOST of the BE motors went into model B tractors.. So if your ENGINE serial number is 21778, your TRACTOR serial number should be in the 21xxx- 22xxx range. That would show the motor and tractor are ORIGINAL to each other. Below shows that tractor would have been built in 1939. .... The 1939 had different front wheel hubs/ rims, than those built in the 1940s- 1950s... Post a photo of your wheel / rim if you can.
Edited by steve(ill) - 08 Jul 2021 at 3:38pm
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Like them all, but love the "B"s.
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B26240
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Posted: 08 Jul 2021 at 3:53pm |
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The letter G after the s/n stands for gas, K would be for Kerosene. I was told that AM stands for Allis Milwaukee Not sure if thats correct but Jim is right when he said the raised numbers preceded by AM are casting numbers.
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OrangeTractorPower39
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Posted: 08 Jul 2021 at 4:04pm |
 B26240 wrote:
The letter G after the s/n stands for gas, K would be for Kerosene. I was told that AM stands for Allis Milwaukee Not sure if thats correct but Jim is right when he said the raised numbers preceded by AM are casting numbers. |
Oh ok that would make sense, I didn't think Allis Chalmers had a kerosene option for the B. I kind of figured that they were the casting numbers since the rear end has two of the same on each side. I think the AM meant American sense A/C made a British B the letters would be EU.
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OrangeTractorPower39
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Posted: 08 Jul 2021 at 4:05pm |
Jim.ME wrote:
Your description of the numbers beginning with AM, sounds more like casting numbers than serial numbers. If the numbers are raised from the surface they are casting numbers, serial numbers are stamped in. There were likely hundreds and thousands of a given casting number used. The BE number stamped on the back of the block, above the flywheel is the engine serial number.
The tractor serial number will be stamped in an area just forward of the gear shift pattern casting. Tractor No will be cast right forward of the flat spot the actual serial number is stamped in.
I very much doubt there is a way to tell if all the components are original, as you are seeking.
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Do you know what the -11 means after AM-2916-11 or AM-2961-11?
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OrangeTractorPower39
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Posted: 08 Jul 2021 at 4:08pm |
steve(ill) wrote:
MOST of the BE motors went into model B tractors.. So if your ENGINE serial number is 21778, your TRACTOR serial number should be in the 21xxx- 22xxx range. That would show the motor and tractor are ORIGINAL to each other. Below shows that tractor would have been built in 1939. .... The 1939 had different front wheel hubs/ rims, than those built in the 1940s- 1950s... Post a photo of your wheel / rim if you can.
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Ok yes, the tractor serial no. is 21562 so I suppose it is the engine it had from factory. I will try my best to get pictures of the front rims/hubs its in a dark building but I'll do my best. Do you by any chance know what the D28X means? Its right next to the casting number on the block.
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Jim.ME
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Posted: 08 Jul 2021 at 5:00pm |
It would appear the suffix is related to the year of the casting. 11 would be a 1939 casting.
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OrangeTractorPower39
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Posted: 08 Jul 2021 at 6:09pm |
Jim.ME wrote:
It would appear the suffix is related to the year of the casting. 11 would be a 1939 casting.
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Thank you!
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OrangeTractorPower39
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Posted: 08 Jul 2021 at 7:23pm |
Thank you all for the info! But does anybody know what the D28X means? its next to the casting number on the block, kind of behind the magneto. 
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WillsShop
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Posted: 15 Nov 2021 at 1:58pm |
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My wife's 1939 B has an engine casting number of AM 2916 11 Serial number 16xxx. It has been kept in the shop all of its life. It was repainted 10 years ago. It is a really nice AC B.
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WillsShop
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Posted: 15 Nov 2021 at 2:13pm |
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Engine Ser # BE 16225 G.
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WillsShop
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Posted: 15 Nov 2021 at 2:24pm |
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The BE may be the company that machined and assembled the engine - Buda Engine Company, which was acquired by AC in 1953?
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steve(ill)
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Posted: 15 Nov 2021 at 4:46pm |
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BE was just the designation of a 116 cubic inch motor that ALLIS made for the model B motor ( 1938 era).... A few years later they made the Model C also, and the engine was enlarged to 125 inch and the model number changed to "CE" and used in the B and C tractors from then on... and the CA model in the 1950s.
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Like them all, but love the "B"s.
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