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IB amp gauge

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Freewheeling View Drop Down
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Joined: 05 Nov 2017
Location: Wisconsin
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    Posted: 10 Sep 2023 at 9:44am
I'm restoring an Allis IB to as original as possible. I've looked on line for a B amp gauge and found a lot of variations. 60 amp, 30 amp, 20 amp, with Allis-Chalmers on the face and without, colored dial and numbered, etc.  The tractor is a 1952.  Can anyone tell me what the factory original gauge looked like?  Thanks. 
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steve(ill) View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 10 Sep 2023 at 12:42pm
i believe it looked like this......... ??


Like them all, but love the "B"s.
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Freewheeling View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Freewheeling Quote  Post ReplyReply Direct Link To This Post Posted: 10 Sep 2023 at 2:28pm
Hi Steve,
Thanks.  I wonder if it was a 30 amp since the system theoretically doesn't put out that much.

By the way, I am wrap my head around the electrical system.  I read an article that related it to water through a pipe. Made it easier to understand volts and amps and principle of the generator.  Using that analogy it seems that the 3-way switch acts like a valve in a pipe.

I did some tests on the generator last week both assembled nd disassembled.
I set the multimeter @ lowest ohm scale - 200
Between 3rd brush and F terminal
Disassembled - 2.2-2.3
Assembled - the same
F terminal to ground ( case)
Disassembled - no reading
Assembled - 3.3
Assembled 
3rd brush to ground - 0.3
Other non-grounded brush to ground - 0.3
Ground brush to ground - 0.0
"A" terminal to ground - 0.3

My understanding is that these are all good readings. Correct?
Hopefully I can get back to the shop next week and check the wiring.
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steve(ill) View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 10 Sep 2023 at 5:06pm
i dont know if the ORIGINAL amp gauge was 20 or 30 amp.... Personally i like the 20 amp BLACK aftermarket gauge.. Thats what i have been using.. But many will say the "original" was white with a chrome ring and the words ALLIS CHALMERS on the face.. but if it was 20 or 30 amp , i dont know.


off hand, i think your numbers look pretty good..
Like them all, but love the "B"s.
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Steve in NJ View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve in NJ Quote  Post ReplyReply Direct Link To This Post Posted: 10 Sep 2023 at 6:01pm
The original amp gauge was a 20/20. Most were Black face white letters. No Allis-Chalmers name on the face. It looks like our 1500-01A on our website. HTH
Steve@B&B
bb-customcircuits.com
39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife
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