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1945 Allis Chalmers B |
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Bram0419
Bronze Level Joined: 29 Jun 2020 Location: Minnesota Points: 10 |
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Posted: 29 Jun 2020 at 1:13pm |
I have a 1945 Allis B that runs great, but as of late there seems to be something draining the battery. Headlight switch is turned off. When I hook up the battery and throw the multimeter on it I can watch the Volts drop. Any ideas? Thank you
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HoughMade
Orange Level Joined: 22 Sep 2017 Location: Valparaiso, IN Points: 691 |
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How is the cutout on the generator?
...assuming you have the original generator.
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1951 B
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Bram0419
Bronze Level Joined: 29 Jun 2020 Location: Minnesota Points: 10 |
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Yes, it has the original generator.
I havent looked into the cutout at all. Sounds like this could be a good place to start. Is there a good way to test this alone or to single it out as the issue?
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Bram0419
Bronze Level Joined: 29 Jun 2020 Location: Minnesota Points: 10 |
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furthermore, im assuming that if it is the cutout i would have to replace it? Or is there a way to fix this issue?
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Boss Man
Orange Level Joined: 03 Mar 2018 Location: Greenleaf, WI Points: 608 |
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If its the original style take the cover off and ck the points. If they are stuck shut there's your problem.
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Alvin M
Orange Level Joined: 24 Jun 2018 Location: PA Points: 728 |
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Cut Out Can Be Rebuilt With A Diode That Is What I Do
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Bram0419
Bronze Level Joined: 29 Jun 2020 Location: Minnesota Points: 10 |
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Awesome, I will give that a shot and report back. Thank you
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Proud Owner of a 1945 Allis Chalmers B
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Bram0419
Bronze Level Joined: 29 Jun 2020 Location: Minnesota Points: 10 |
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Ok, it looks like the cutout is fine. Here comes a stupid question though because it goes against everything I have known about a battery. The positive is always red, and the negative is always black. However on my Allis, the red wire goes right to the metal column as a ground, the black wire is the one that runs to the starter.... is the black wire actually positive then??
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Proud Owner of a 1945 Allis Chalmers B
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mdm1
Orange Level Joined: 12 Sep 2009 Location: Onalaska, WI Points: 2592 |
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The tractor is positive ground. The black will be neg. I am assuming it is still 6v if you still have the original generator.
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Everything is impossible until someone does it! WD45-trip loader 1947 c w/woods belly mower, 1939 B, #3 sickle mower 1944 B, 2 1948 G's. Misc other equipment that my wife calls JUNK!
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Dick L
Orange Level Joined: 12 Sep 2009 Location: Edon Ohio Points: 5082 |
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A color ground wire was not original. Red may not always be positive on an old tractor. It had a flat woven cable from +/positive to the steering column post. Wires come in both colors black and red in many lengths. I have some tractors with both the same color because the store didn't have the color I wanted in stock. Therefore always check the +/positive or -/ negative on the battery rather relying on cable color.
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Dusty MI
Orange Level Joined: 13 Sep 2009 Location: Charlotte, Mi Points: 5053 |
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Just put colored tape on the cables to make them the right color.
Dusty
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917 H, '48 G, '65 D-10 series III "Allis Express"
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Bram0419
Bronze Level Joined: 29 Jun 2020 Location: Minnesota Points: 10 |
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Ok,
So with this original 6V system, the positive cable (from the positive terminal on the battery) just goes to the steering column as a ground?
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Proud Owner of a 1945 Allis Chalmers B
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Dick L
Orange Level Joined: 12 Sep 2009 Location: Edon Ohio Points: 5082 |
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Correct! |
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Bram0419
Bronze Level Joined: 29 Jun 2020 Location: Minnesota Points: 10 |
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Ok, thank you. Now that that is figured out and the cutout on the generator isn't stuck. Any other ideas of what would keep draining the battery so fast?
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Proud Owner of a 1945 Allis Chalmers B
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chaskaduo
Orange Level Joined: 26 Nov 2016 Location: Twin Cities Points: 5203 |
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Maybe pull the starter and clean it out. Check for frayed wires etc. inside of it. Could still be the light switch even though it is off.
Edited by chaskaduo - 30 Jun 2020 at 11:07am |
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1938 B, 79 Dynamark 11/36 6spd, 95 Weed-Eater 16hp, 2010 Bolens 14hp
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C in Concord
Bronze Level Joined: 26 Sep 2019 Location: Concord, WI Points: 109 |
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Sounds like you've checked the battery, but I can't assume when diagnosing via forum. Does the battery hold a charge when not hooked up?
If you are good there, one trial and error method I've used: Pull the negative off the battery. Put the test light between the post and the ground wire. If the light illuminates, you have a draw. Disconnect one item at a time; when the light goes out, you found the draw. Not sure exactly how to adapt it to positive ground though. Where's Steve... If the voltage draw is that apparent on your multimeter, you may just be able to watch that and unhook items also. Good Luck! Ben
Edited by C in Concord - 30 Jun 2020 at 1:31pm |
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Leave things better than you found them.
1941 Model C (restored 2020) |
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steve(ill)
Orange Level Access Joined: 11 Sep 2009 Location: illinois Points: 77706 |
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take one cable off the battery and see if it still runs down overnight ( battery problem)... if not, then run a test like Ben said, or disconnect one item every day and see if the battery runs down overnight... You know it has to be the generator / cutout / starter / or switch......... look at all the wires and make sure nothing is frayed and touching ground.
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Like them all, but love the "B"s.
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Bram0419
Bronze Level Joined: 29 Jun 2020 Location: Minnesota Points: 10 |
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Thank you all for the suggestions! I will give all of these ideas a try. Hopefully in the next few days I will have some success to report.
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Proud Owner of a 1945 Allis Chalmers B
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CTuckerNWIL
Orange Level Joined: 11 Sep 2009 Location: NW Illinois Points: 22810 |
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I had that problem on my CA a few years ago. It turned out to be the starter switch. The insulator on the inside of the switch had crumbled in pieces and somehow it was shorting a "little bit". I don't know how that could be, but I replaced the switch. The old one had a black circle inside where it had been getting hot, but evidently never made a real good connection to burn the insulation off the battery cable.
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http://www.ae-ta.com
Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF |
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Ted in NE-OH
Orange Level Joined: 12 Nov 2009 Location: Austinburg OH Points: 1703 |
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What diode do you use?
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CA, WD, C, 3 Bs, 2 Gs, WC, I-400, 914
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Bram0419
Bronze Level Joined: 29 Jun 2020 Location: Minnesota Points: 10 |
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Well after taking the cover off of the cutout and inspecting everything else (I did find a mouse nest in my toolbox) none of the wires were chewed or frayed however. My battery is now holding steady at about 6.13V It seems that the issue has been resolved. Thanks everyone for all of the recommendations. Im sure ill be back with further questions down the road.
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Proud Owner of a 1945 Allis Chalmers B
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