Allis Chalmers b

jeff-h01 · Guest Report to Moderator

I have a 39 model b Allis and i have no spark. Its been sitting for several years and wanted some help on what the problem could be. Thanks

Zachary Hoyt · Posted: Tue Dec 18, 2012 3:23 pm Post subject: Re: Allis Chalmers b

Does it have a magneto or a distributor? In either case you would want to check on the points and rotor and cap to make sure the contacts are clean and the point gap is correct. If a distributor you would want to check that battery voltage was getting to the coil. There is a lot more to do if these things don't fix the problem but they are a place to start.
Zach

jeff-h01 · Regular Joined: 18 Dec 2012 Posts: 35 Report to Moderator

Its a mag..no battery

jeff-h01 · Regular Joined: 18 Dec 2012 Posts: 35 Report to Moderator

It was almost dark when i determined no spark...is there like 4 bolts or screws to take off where the wires plug into? I got a guy coming to look at it tomm and its been sitting a few years so i was just trying to get it to run...last time w had to pull stay it

old · Posted: Tue Dec 18, 2012 3:53 pm Post subject: Re: Allis Chalmers b

Most likely the points need to be replaced or cleaned BUT depending on the mag you also have to know how to install the rotor the correct way or you will get it way out of time. Send me an e-mail and tell me which mag it is and I can then send you the manual for your mag so you can do it the correct way

jeff-h01 · Regular Joined: 18 Dec 2012 Posts: 35 Report to Moderator

I'm not sure which one it has...its a 39 serial number b32474 if that helps...to shut it off it has a little thing on the side to ground it out...lol sorry not much info

old · Posted: Tue Dec 18, 2012 5:31 pm Post subject: Re: Allis Chalmers b

Look on the mag it should have some info on it. There was 2 common mags used on the A/C tractors. So if you send me an e-mail and I send you the wrong one just let me know and I can send the other one.

jeff-h01 · Regular Joined: 18 Dec 2012 Posts: 35 Report to Moderator

Sounds great...won't be able to untill tomm afternoon as it is at my dads...also what's a good asking price for one? It was a raffle tractor about 12 yrs ago complete restoration never been outside all tires are good really just needs washed also has cultivators on it...i was asking 1700...is that fair?

RalphWD45 · Posted: Tue Dec 18, 2012 7:03 pm Post subject: Re: Allis Chalmers b

Probably a Fairbanks Morse FMJ magnito, as these were the most common on a AC B or C tractor.To clean the points, remove the cap that has 2 screws, and take note of where the rotor bug is pointing at, then remove the 4 scrws holding the bakelite cap on.After exposing the points, go sneak the wife's sandpaper nail board, out of the house, and insert it between the closed points, and sand them shiney. Blow all sand out of the magnito, and reinstall the bakeite cap,MAKING SURE THAT THE ROTOR STILL POINTS WHERE IT DID PREVIOUSLY. This assumes that you didn't rotate the engine during the above actions. replace the cap with 2 screws, and try for fire. If no fire then your condenser or coil is bad, or the kill switch is grounded out. Good luck

jeff-h01 · Regular Joined: 18 Dec 2012 Posts: 35 Report to Moderator

Now that u said it remember it saying Fairbanks Morris on it...i know about not turning the engine while apart...i have a Farmall f-12 and f-14i had to do work to..thanks for the help

jeff-h01 · Regular Joined: 18 Dec 2012 Posts: 35 Report to Moderator

So i replaced the points and condenser and still no spark..it us a Fairbanks Morris fmj any other ideas?

Allis Chalmers	Case	Cockshutt	Farmall IH	Ford 8N,9N,2N	Ford
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