Help identifying tractor

I believe its a 1940s AC model B but im not positive its a 3 speed 24 tires and i dont believe it has a frame around engine.Here are some numbers ive pulled off it.
Am 2976 13
J or n 25 z
am3208 2
am 2787 18 or on other side20
Thanks for the help any one know engine? Year or model?

Arched front axle is a B. 3 speed could be a B or a C. That front axle would fit the B, C, and CA.

Welcome to the forum

Edited by thendrix - 07 Nov 2016 at 8:32pm

"Farming is a business that makes a Las Vegas craps table look like a regular paycheck" Ronald Reagan

Hey thanks guys will let you know what i find tomorrow

the motor serial number is stamped into the flat face where the motor bolts to the torque tube, left side, above center.... about where that leaf is pointing. Motor should be BExxxxx or CExxxxx .......... get that, and get the TRACTOR number Bxxxxxx by the shift lever.

Like them all, but love the "B"s.

Welcome to the Allis Forum.

B 56150 would be a late 1941

Gary

What spark plugs/oil and battery do you guys suggest i use? Im assuming most model B s had the same engine? Also wanting to change transmission oils and diff oil, spark plug wires . Any info will help until i buy a Manuel thank you.

Edited by Jcashsalt - 08 Nov 2016 at 8:27am

I have an AC shop manual posted on line at:
http://www.geraldj.networkiowa.com/Trees/Allis-Chalmers-G-B-C-CA-Service.pdf

And a military B manual (probably IB) at:
http://www.geraldj.networkiowa.com/Trees/BMilitary.pdf
which is a combination operators and shop manual.

Any plugs that fit other than Champion will work fine. Copper wires, not carbon wires for the plug wires. Looks like it has an alternator, that wasn't original so it probably takes a 12 volt battery negative ground though originally it was 6 volts positive ground.

Vendors on this site have battery boxes to sell, then pick the biggest battery that will fit in the box for the best battery life.

A good 10 W 30 engine oil will be nicer to the engine than the oil originally specified, probably 10 for winter and 30 for summer neither with detergent because when that tractor was new detergent oil didn't exist. And car engines needed rebuilding every 35,000 miles. Better oils make car engines last ten times that now.

Transmission oil probably modern 80 would work, maybe universal transmission and hydraulic oil too, more like 20 weight.

Gerald J.

Jcashsalt wrote:

What spark plugs/oil and battery do you guys suggest i use? Im assuming most model B s had the same engine? Also wanting to change transmission oils and diff oil, spark plug wires . Any info will help until i buy a Manuel thank you.

Wow...you kicked a hornets nest when you asked about the best oil and transmission fluid. I hope that the nest is empty or it is a heck of a ride. Kind of like asking which is the right religion!!

I use Rotella 10 W 30 in my B. It seemed to be the consensus when I kicked the hornets nest. In the transmission I use hytran because mine has hydraulics and they are all off the same system. Again it was the consensus of the people that replied.

Good luck with the B. They are great little machines and will surprise you with how much they can do for their size. I may sell other tractors someday but I will never sell my B until they are putting me in the ground.

1950 WD, 1955 B, 66 Jacobsen Chief-O-Matic, 68 Simplicity 2110, 77 IH Cub Cadet 1450 w/front loader

Ive heard different opions on weither to use detergant oils or not does everyone ise non det?

Ok found the motor number its be 57156 g

Get'r run'n,,,,then take it out 4 a ride around the neighborhood.Let the neighbors see.

1952 B 1950 Ferguson TO-2O

Thanks everyone for the help plan on doing a complete reatore on this old gal

Detergent oil is good for ALL engines, it keeps them clean and has other additives that prevent moisture from making batteries of silver/copper bearing inserts against steel that are shorted and so corrode rapidly without that additive.

Rotella diesel oil is good for vintage engines because it has more zinc additive to give better lubrication to the cams with sliding cam followers. Modern cars and truck use roller followers and their oil has less of that zinc additive to be easier on the catalytic converter when oil gets to the exhaust.

When detergent oils were introduced car engine life went way longer.

Gerald J.

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