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JSHIVERS 
Bronze Level
Joined: 24 Jun 2021
Location: Bloomington,IN
Points: 64
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 Topic: B starter smoking - Help!
Posted: 11 Jun 2022 at 8:47pm |
I had a dead battery and put a new one in today on my 1940 B. It has been converted to 12v. When I put the negative cable on, I got sparks and when I hit the starter button, I had smoke coming from the starter. The neg cable pretty much melted. Previously, everything worked fine. I removed the starter. Any thoughts on what's happening here? Bad starter? Bad solenoid? Ground issue? Any help would be greatly appreciated.
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steve(ill)
Orange Level Access
Joined: 11 Sep 2009
Location: illinois
Points: 85906
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Posted: 11 Jun 2022 at 8:50pm |
smoke of sparks from the cable ends are bad connections... some INTERNAL to the starter is not good..
Use jumper cables on the bench and try to spin the starter to prove it is OK.... cable melting is VERY HIGH AMPS... see if the motor will turn over by hand or roll ... maybe the starter was STUCK on the flywheel ?
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Like them all, but love the "B"s.
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PaulB
Orange Level
Joined: 12 Sep 2009
Location: Rocky Ridge Md
Points: 4942
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Posted: 12 Jun 2022 at 6:48am |
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Putting 12 volts to a worn out 6 volt starter is just asking for trouble. A good starter should have no problem starting a B with 6 volts. Using a 12 volt battery on a 6 volt starter is also a good way to ruin a ring gear. If you want to keep your tractor at 12 volts, have your starter rebuilt properly as a 12 volt starter, it sound as your started needs to be rebuilt and now's the time to do it right.
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If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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Steve in NJ
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Joined: 12 Sep 2009
Location: Andover, NJ
Points: 11926
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Posted: 12 Jun 2022 at 4:28pm |
Not a good practice. Running 12 volts through 6V field coils makes the Starter motor violent which leads to cracked or broken nose cones, bent drives, and premature wear to the teeth on the ring gear. (flywheel) If the Tractor is converted to 12 volts, do the Starter the same way. Either you crisscrossed cables or as Steve mentioned maybe the Starter was stuck. How long ago was "previously".
We offer Starter motor rebuilding and conversions if interested....
Steve@B&B bb-customcircuits.com
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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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JSHIVERS
Bronze Level
Joined: 24 Jun 2021
Location: Bloomington,IN
Points: 64
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Posted: 04 Jul 2022 at 6:00pm |
Just an update. Had the starter reworked. The real issue was in the starter switch on the control panel. I cleaned it up and the sparking issues are resolved. I'm going to change to a set of keys for the ignition.
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