Allis Chalmers B project
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=209667
Printed Date: 01 Mar 2026 at 3:08pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Allis Chalmers B project
Posted By: PeterVD
Subject: Allis Chalmers B project
Date Posted: 11 Jan 2026 at 5:04am
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I'm Peter, 54 years old and located in Belgium. I started a rebuild project together with my 18 year old son, an Allis Chalmers B It runs and drives, but not as it should, so we got a little bit of work in the future It's already converted to 12 Volt When I find out how I will post some pictures on the forum I don't know if this works: http://youtu.be/sx1m97ZFVPk" rel="nofollow - http://youtu.be/sx1m97ZFVPk
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Replies:
Posted By: steve(ill)
Date Posted: 11 Jan 2026 at 8:04am
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thats a good looking little tractor.. You have the optional 5 bolt rear wheels / hubs... Most of the Bs had a 2 inch spline shaft that the hub was mounted to.. Good luck.. This is a great place to ask questions.. ------------- Like them all, but love the "B"s. |
Posted By: Gary Burnett
Date Posted: 11 Jan 2026 at 8:18am
| Interesting rear wheels,has the center nut like the older B's but the centers are different from anything I have ever seen.Maybe something offered in Europe and not in the USA?Very neat tractor. |
Posted By: steve(ill)
Date Posted: 11 Jan 2026 at 8:27am
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your right Gary.. I had to blow up the photo to see the nut.... I THINK there were 3 versions of the axle... one had the center nut, one had the 5 bolt flange, and a third was an ADAPTOR hub with 5 bolts that slid onto the original taper spline shaft... That is apparently what he has..
normally the 5 bolt flange came with the straight adjustable front axle as compared to the wishbone axle.. hard to tell in this movie.. ------------- Like them all, but love the "B"s. |
Posted By: PeterVD
Date Posted: 11 Jan 2026 at 9:03am
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Can I just ask how I can post pictures here, I don't find a program to upload them |
Posted By: steve(ill)
Date Posted: 11 Jan 2026 at 9:26am
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at the bottom of this post, on the left, there is a POST REPLY box.. Click on that and it will bring up another page... Click on the GREEN TREE icon in the heading of that page.. At the lower left you can CHOOSE your PHOTO from your computer file or desktop..... Files need to be in the 800 x 600 pizel size and will be 100- 200 KB... Most cameras are 5000 x 4000 pixels and 5 MB in size and this SITE will NOT RESIZE for you.. Do that in PAINT or similar before you upload..
------------- Like them all, but love the "B"s. |
Posted By: plummerscarin
Date Posted: 11 Jan 2026 at 9:32am
Steve, you have your photo uploads response in a file to copy and paste? It'll keep a broken record  No disrespect to OP or you. Wish there was an easier way |
Posted By: PeterVD
Date Posted: 11 Jan 2026 at 10:14am
| http://photos.fife.usercontent.google.com/pw/AP1GczPhTWJSrrgqLuSOcxFZHzDz8RUPYkl0MTZE4qMQj3tLTyjzanVp488y=w975-h731-s-no-gm?authuser=0" rel="nofollow - http://photos.fife.usercontent.google.com/pw/AP1GczPhTWJSrrgqLuSOcxFZHzDz8RUPYkl0MTZE4qMQj3tLTyjzanVp488y=w975-h731-s-no-gm?authuser=0 |
Posted By: steve(ill)
Date Posted: 11 Jan 2026 at 1:27pm
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Peter, sometimes you can get a third party site to post your photos, but the easy way is to have it on your computer or phone and just use the GREEN TREE icon as i posted above.. Some guys post LINKS when they have an album, but a single photo or two is easy with the GREEN TREE. here is a snapshot of your You Tube video...  ------------- Like them all, but love the "B"s. |
Posted By: Nathan (SD)
Date Posted: 11 Jan 2026 at 9:07pm
It is a requirement back then that tractors sold in Europe had to have flanged axles to bolt to the wheel. I wish I could find the source of that info now. |
Gary Burnett wrote:Posted By: PeterVD
Date Posted: 12 Jan 2026 at 7:04am
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I have a Fairbanks Morse FM magneto on the B, I need to change the spark plug cables. Can I just pull the old cables out of the cap? |
Posted By: WF owner
Date Posted: 12 Jan 2026 at 7:14am
Yes. Make sure you use (copper) wire spark plug wires with a magneto.
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Posted By: PeterVD
Date Posted: 12 Jan 2026 at 8:28am
I ordered a set with a copper wire inside, and Champion J8C spark plugs
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Posted By: steve(ill)
Date Posted: 12 Jan 2026 at 9:28am
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some AC engines tend to have problems with the new Champ J8C plugs... Some work OK.. If you have a random miss fire after all is done, keep that in mind.... you may be fine.. ------------- Like them all, but love the "B"s. |
Posted By: PeterVD
Date Posted: 12 Jan 2026 at 10:13am
Thanks Steve, What plugs do you recommend and are they available in Belgium (europe) In Belgium we have a webshop that specialises in oldtimer trators (named histoparts) and the only plug they have for an Allis Chalmers is the Champion J8C The only alternative I find here is a NGKB6S
------------- Restoring a Allis Chalmers B |
Posted By: PeterVD
Date Posted: 12 Jan 2026 at 11:13am
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On the documents I see that mij B is registered in France for the first time in 1953. The serial number is I0062 en according to google it's build way earlier than 1953 Not so important to me, I just like to know the year that it's build
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Posted By: Les Kerf
Date Posted: 12 Jan 2026 at 1:06pm
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Nice tractor!  Is the small black box just below the steering arm the battery? Your generator and electrical looks different than the US versions. |
Posted By: steve(ill)
Date Posted: 12 Jan 2026 at 1:24pm
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Peter, that serial number in the 10,000 range would be a 1938.. Your tractor has a battery box, generator and starter motor... General appearance would make you think it was built several years later than that.. Maybe your missing a digit ? The serial number is by the gear shift lever ... B- XXXXXX... the front wheel / rim was different on the 1938- 49 tractors... yours looks like the standard 5 bolt automotive type rim that was common on the later tractors.. In the US, the NGK plugs are more common among Allis users of the smaller engines.... Since you have the Champs, give them a try... the might be OK..
------------- Like them all, but love the "B"s. |
Posted By: PeterVD
Date Posted: 13 Jan 2026 at 7:15am
It has been converted from 6 Volt to 12 Volt ------------- Restoring a Allis Chalmers B |
Posted By: PeterVD
Date Posted: 13 Jan 2026 at 7:21am
I think I might have an Englisch build (EB) version  The letters are not visible on the block Englisch build 1953 B's have serial numbers between EB9200 and EB11120 (That's what I find on the internet) ------------- Restoring a Allis Chalmers B |
Posted By: steve(ill)
Date Posted: 13 Jan 2026 at 7:27am
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England imported some tractors and then some "KITS" to build theirself. I dont know the full story, but your right.. some had English serial numbers... I think they tried to use some parts made in the UK... You might have LUCAS starter / generator ... and some parts might look Similar, but be Different than a US made tractor. ------------- Like them all, but love the "B"s. |
Posted By: steve(ill)
Date Posted: 13 Jan 2026 at 7:44am
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there are a couple guys on here from the UK. Mark Everett comes to mind. Dont see him post much, but comes to read routinely.. He would be a LOT BETTER at giving you more details on this tractor.. ------------- Like them all, but love the "B"s. |
Posted By: PeterVD
Date Posted: 15 Jan 2026 at 4:49pm
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Is there a Rev counter that works with the Fairbanks Morse FM Magneto? And how do you connect it? ------------- Restoring a Allis Chalmers B |
Posted By: steve(ill)
Date Posted: 15 Jan 2026 at 4:53pm
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no, there is no RPM indicator for the B tractors.. You would have to get an aftermarket unit that counts PULSES on a 4 cylinder engine..... nobody really worries about the RPM much... not a big deal in the long run. ------------- Like them all, but love the "B"s. |
Posted By: PeterVD
Date Posted: 18 Jan 2026 at 11:31am
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Today put a new condenser in the magneto, adjusted the timing, new spark plug wires and new spark plug, sounds ok I think http://youtube.com/shorts/1UltMjkiCLI" rel="nofollow - http://youtube.com/shorts/1UltMjkiCLI
------------- Restoring a Allis Chalmers B |
Posted By: steve(ill)
Date Posted: 18 Jan 2026 at 12:55pm
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YEP... sounds like your doing GREAT !! ------------- Like them all, but love the "B"s. |
Posted By: PeterVD
Date Posted: 18 Jan 2026 at 3:24pm
Thanks Steve  I only have one small problem with it now, the choke has to stay a little bit closed to keep it running, when I open the choke completely the motor drops dead I hope a good clean of the carburator will help ------------- Restoring a Allis Chalmers B |
Posted By: DiyDave
Date Posted: 18 Jan 2026 at 3:43pm
Or the felt air seals for the choke shaft... ------------- Source: Babylon Bee. Sponsored by BRAWNDO, its got what you need! |
Posted By: PeterVD
Date Posted: 18 Jan 2026 at 4:00pm
Do you have a parts number for the felt air seals please? Is it any of these: http://histoparts.com/ac8024-carburateur-reparatieset-allis-chalmers-b-c/3?catId=2037" rel="nofollow - http://histoparts.com/ac8024-carburateur-reparatieset-allis-chalmers-b-c/3?catId=2037
------------- Restoring a Allis Chalmers B |
Posted By: steve(ill)
Date Posted: 18 Jan 2026 at 6:43pm
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you can normally grab the arm on the shaft and try to WOBBLE IT... If you got a couple thousandths clearance, thats OK... If you got 30 thousands clearance, you could be sucking air around the shaft...Also a leaking manifold gasket can do that.... But i would agree with you that 90% of the time it is a partially plugged main jet / crud in the carb. ------------- Like them all, but love the "B"s. |
Posted By: DiyDave
Date Posted: 18 Jan 2026 at 8:07pm
It looks like they are there, the 2 items to the right of the gold colored shaft...  ------------- Source: Babylon Bee. Sponsored by BRAWNDO, its got what you need! |
Posted By: PeterVD
Date Posted: 19 Jan 2026 at 6:31am
No letters/numbers on the carb, can anyone tell me if this is a Zenith or a Marvel Schebler carb? ------------- Restoring a Allis Chalmers B |
Posted By: Gary Burnett
Date Posted: 19 Jan 2026 at 7:45am
| Zenith |
Posted By: wjohn
Date Posted: 19 Jan 2026 at 8:20am
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That is a Zenith, but I have never seen that style on a B. If you look at where it mounts to the manifold, it looks smaller than it should be. I wonder if it came off of something else and is not the original carburetor... Unless that is what Bs built in the UK used? ------------- 1939 B, 1940 B, 1941 WC, 1951 WD, 1952 CA, 1956 WD-45 |
Posted By: PeterVD
Date Posted: 19 Jan 2026 at 3:02pm
According tot Google the UK build B's have a Zenith 24T2 carb, and mine looks like it think http://https://www.da7c.co.uk/technical_torque_articles/zenith_24t2_carburettor.html" rel="nofollow - https://www.da7c.co.uk/technical_torque_articles/zenith_24t2_carburettor.html ------------- Restoring a Allis Chalmers B |
Posted By: steve(ill)
Date Posted: 19 Jan 2026 at 4:24pm
that model is popular in the USA, but was not used on the Alllis..... Several sites list the carb.. ------------- Like them all, but love the "B"s. |
Posted By: Trinity45
Date Posted: 19 Jan 2026 at 5:29pm
Best of luck, I have a working B with mounted cultivators we use in sweet corn.
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Posted By: PeterVD
Date Posted: 25 Jan 2026 at 5:28pm
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Is there a possibility to add a foot accelerator on the B ? ------------- Restoring a Allis Chalmers B |
Posted By: steve(ill)
Date Posted: 25 Jan 2026 at 7:47pm
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the INDUSTRIAL MODEL , IB , had a foot accelerator.... couple extra parts and a spring loaded over ride foot feed on the hand throttle...... there is a guy on this site that makes foot feeds for "D" series tractors... might be something to look at... I think its Tracy ?? https://www.allischalmers.com/forum/fsd1415-foot-throttles_topic208513_post1783320.html?KW=throttle#1783320" rel="nofollow - https://www.allischalmers.com/forum/fsd1415-foot-throttles_topic208513_post1783320.html?KW=throttle#1783320 ------------- Like them all, but love the "B"s. |
Posted By: steve(ill)
Date Posted: 25 Jan 2026 at 7:51pm
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changing the hand throttle to a foot throttle would not be too hard... having BOTH is a litte more complicated becase the hand throttle is at a FIXED position and you want the FOOT FEED to over ride that... IE, the spring. ------------- Like them all, but love the "B"s. |
Posted By: PeterVD
Date Posted: 25 Jan 2026 at 9:34pm
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Different sites give different instructions for setting the valve lash, one says 0.25 mm cold, another says 0.25 mm hot... whitch one is right? ------------- Restoring a Allis Chalmers B |
Posted By: steve(ill)
Date Posted: 25 Jan 2026 at 9:40pm
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everyone sets them cold.... normally add a couple thousandths to the HOT value... .25mm is .010 inch... normally set them at .012 inch or .30 mm ------------- Like them all, but love the "B"s. |
Posted By: PeterVD
Date Posted: 04 Feb 2026 at 6:30pm
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I think the governor spring became a little old/weak. I have read that is possible tot replace it by the spring for a CA, to gain a little bit of RPM/ speed. Is this correct? ------------- Restoring a Allis Chalmers B |
Posted By: Les Kerf
Date Posted: 04 Feb 2026 at 7:22pm
Yes. |
Posted By: PeterVD
Date Posted: 05 Feb 2026 at 10:38pm
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Does anybody know how much NM a CA spring pulls? Original ones not available ------------- Restoring a Allis Chalmers B |
Posted By: Les Kerf
Date Posted: 16 Feb 2026 at 11:50am
My CA governor spring measures about 1.57 inches long in the resting position (outside to outside overall length). When installed on the tractor with the throttle in the wide-open maximum stretched position it measures about 2.2 inches overall length. Lacking a suitable scale with which to measure the NM, I contrived a means of fastening one end of the spring to a hook mounted in my bench vise, and then hung a bucket containing wheel weights on the lower end of the spring. I added weights until the spring had stretched out to 2.2 inches, and then weighed the bucket on my doctor-type bathroom scale. It required 17 pounds and 12 ounces to stretch the spring from the original 1.57 inches to 2.2 inches. I shall leave it to someone else to do the conversion to SI units Your mileage may vary
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