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Allis Chalmers Discussion Forum
:

Charging Problems on ALLIS B

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booth1331

11-11-2015 18:22:29




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Have a 1943 allis B...12V generator with a condenser. Has a voltage regulator. Not sure if it has a light switch charger or not. I have had the generator rebuilt. But only puts out 10v. I have manually operated the regulator trying to make it charge at a higher V but not luck.

Is the 12V gen original? What should this tractor have for a charging system if not? If its original I may just need a new regulator. Didn't get it checked out. I could use a wiring schematic too if the 12v gen/regulator system is original

Thanks!!!!

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booth1331

01-03-2016 19:04:31




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 Re: Charging Problems on ALLIS B in reply to booth1331, 11-11-2015 18:22:29  
John I used your guide and finally determined my regulator was bad. I had a 3 term regulator. I ordered a 4 wire accidentally....I did some research to figure out how to make it work with the Load terminal. I think I have it...However, it is putting out 18v..Typically starts around 13v then raises to 18v after a minute or two....
Nothing on this tractor is original in the charging system. The light/charging switch has been replaced with a standard light switch....THere is a key switch with 3 terminals, battery, accessory, and ignition.....There is a volt meter instead of an ammeter...I have that wired correctly as I am reading the same voltage with my voltmeter as the one on the tractor....Not sure why I am getting 18v...However, I don't know what type genny and regulator I have. Not sure if type A or B....the genny is a Delco Remy...THe regulator I bought was for an Allis D12 but maybe not correct type for the genny I have...Any ideas??

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John T

11-12-2015 12:31:57




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 Re: Charging Problems on ALLIS B in reply to booth1331, 11-11-2015 18:22:29  
Booth, if you work through my Charging Troubleshooting Procedure it can help diagnose the cause of non charging. It deals with BOTH Cutout Relays (BAT and ARM) which use the Low High Light Switch manual charge control ORRRRRRRRRR Full fledged Voltage Regulators that automatically control charging without any low high manual light switch control method.

If she is running and charges if you use a jumper (See my Para 5) to ground the gennys FLD post and she charges then but not otherwise, that tells you the genny itself is okay so the problem is the VR or the Cutout Relay isn't well grounded or often the Low High light switch isn't well grounded.

Try my procedure for more detailed directions

John T

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booth1331

01-01-2016 20:03:45




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 Re: Charging Problems on ALLIS B in reply to John T, 11-12-2015 12:31:57  
John I used your guide and finally determined my regulator was bad. I had a 3 term regulator. I ordered a 4 wire accidentally....I did some research to figure out how to make it work with the Load terminal. I think I have it...However, it is putting out 18v..Typically starts around 13v then raises to 18v after a minute or two....

Nothing on this tractor is original in the charging system. The light/charging switch has been replaced with a standard light switch....THere is a key switch with 3 terminals, battery, accessory, and ignition.....There is a volt meter instead of an ammeter...I have that wired correctly as I am reading the same voltage with my voltmeter as the one on the tractor....Not sure why I am getting 18v...However, I don't know what type genny and regulator I have. Not sure if type A or B....the genny is a Delco Remy...THe regulator I bought was for an Allis D12 but maybe not correct type for the genny I have...Any ideas??

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chalmersbob(pa)

11-11-2015 19:42:43




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 Re: Charging Problems on ALLIS B in reply to booth1331, 11-11-2015 18:22:29  
Your tractor was originally 6 volt positive ground.
I don't know what the condenser is that your referring to.
Originally the generator had a relay on top of the generator with 2 wires connected to it,battery & A terminal on the genny, The rate of charge was controlled by the light switch. To test the generator output you can connect the F terminal on the generator to any ground source. This should produce maximum output of about 10 amps. LOL Bob

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JMS/.MN

11-11-2015 19:07:54




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 Re: Charging Problems on ALLIS B in reply to booth1331, 11-11-2015 18:22:29  
OE was a 6 volt positive ground system, Wiring diagrams can be found in the operator manual, and I&T AC 11 service manual.



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