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Minneapolis Moline Tractors Discussion Forum

6 volt starter issues

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Dennis P

06-27-2020 14:40:44

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Have a six volt starter that was working but bendix broke. When reassembled, starter turns slowly and gets hot. Checked fields to ground, no shorts. Checked armature shaft to commentator, no shorts. Brushes are used but still good and making good connection. I noticed that when I bench test it, the armature acts like it is lifting to one side. You can see the brush arm lift up. I cannot see how much clearance there is between armature and field, but could there be enough looseness in the bushings for the armature to make contact with the fields? Iíve had this thing apart several times and cannot find a short or loose connection. Starter is not shimmed to tight, turns easy. Iíve rebuild several before this one but this one baffles me.

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Tramway Guy

06-28-2020 17:59:12

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 Re: 6 volt starter issues in reply to Dennis P, 06-27-2020 14:40:44  
Armature can be cracked or broken also.

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06-28-2020 12:28:46

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 Re: 6 volt starter issues in reply to Dennis P, 06-27-2020 14:40:44  
Yes there can be loose or worn bushings that would allow the armature to drag against field. If this happens starter will get hot quick. I would agree shaft could have bent when bendex broke. If you remove bendex and bench test should eliminate that.

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David G

06-28-2020 10:06:41

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 Re: 6 volt starter issues in reply to Dennis P, 06-27-2020 14:40:44  
I would assume shaft got bent when bendix went bad.

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06-27-2020 16:21:38

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 Re: 6 volt starter issues in reply to Dennis P, 06-27-2020 14:40:44  
Done a few. Just change starter as armature shaft not true. Will drive a person????

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