Battery, charging condition

Farmall Super A, AV, 100, 130, & 140 1939 - 1973

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twotone
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Battery, charging condition

Postby twotone » Thu Jan 12, 2017 8:50 am

1953 Super A. Never showed charge on guage very often. Polarize and it charges for about a minute. Installed a unknown condition VR, polarized, charges at 6.90 volts at WOT, 6.50 volts at idle, battery tests at 6.35 volts engine not running. 6 volt positive ground system. Are these readings acceptable?


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Re: Battery, charging condition

Postby Eugene » Thu Jan 12, 2017 10:45 am

The voltage readings are acceptable. Good to go.
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twotone
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Location: Versailles,Pa.

Re: Battery, charging condition

Postby twotone » Thu Jan 12, 2017 10:49 am

Thanks for the reply Eugene. Both VR's are overseas made, so we'll see how long it lasts.
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Re: Battery, charging condition

Postby Bigdog » Thu Jan 12, 2017 4:34 pm

Anything above battery static voltage indicates it's charging. Would prefer to see readings around 7 volts but anything above static level is good.
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Re: Battery, charging condition

Postby Stanton » Fri Jan 13, 2017 7:36 am

Tom, here's a link to "How to Perform a Tractor Electrics and Voltage Drop Test" in our How To section. Should be a help.

http://www.farmallcub.com/phpBB2/viewtopic.php?f=140&t=38133&p=311888&hilit=perform#p311888
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twotone
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Posts: 1170
Joined: Sat May 14, 2011 6:09 pm
Zip Code: 15132
Tractors Owned: 53 F Cub
73 F Cub
53 Super A With Snow/Grader Blade
193 Plow With Colter And Jointer
144 Cultivators
22 Mower
Circle of Safety: Y
Location: Versailles,Pa.

Re: Battery, charging condition

Postby twotone » Fri Jan 13, 2017 10:22 am

Thanks Stanton. Good info. I should note also that my SA has always been a good starting tractor, and when I started it yesterday, it gave a slow groan and popped right off. I also noticed that the volts kept increasing slowly the longer I ran it. I ran it for about 20 minutes. I think a slow charge with a battery charger for a bit might bring the charging rate up. It was 65 degrees here in Pittsburgh yesterday, I should have done it then!
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Re: Battery, charging condition

Postby havoc1482 » Fri Jan 13, 2017 5:32 pm

A well-tuned ignition will make these tractors pop over even if you can only get one slow-ass crank from the 6volt battery. It amazes me every time when I start my Super A in below freezing conditions and it cranks slower than It would if I used the hand crank, but as soon as that impulse coupling snaps... BOOM!
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