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Farmall & IHC Tractors Discussion Forum
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M Starter Switch

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Smokin Joe

08-17-2007 07:30:48




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Hey guys, I have a small problem...I hope? What I got is that I keep having to replace the starter switch every couple weeks. I put a new one on at the begining of the summer, started the tractor about 20 times and now I tried to start it the other day and nothing. Touched the switch with a screwdriver and she went again, so down goes another switch. What do you guys think is burning her out?




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john d

08-17-2007 17:41:03




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 Re: M Starter Switch in reply to Smokin Joe, 08-17-2007 07:30:48  
I went through something similar with my M. I put in two new switches in about 6 weeks. Then I noticed when I took out the second one, it was BENT. My M has the foot starter that's the "lever" type, not the earlier type that's a rod going through the lower part of the steering post. When the lever is pushed down, the other end exerts some side-force on the switch. My next switch was made of heavier metal and hasn't bent now in over two years.

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John T

08-17-2007 10:47:41




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 Re: M Starter Switch in reply to Smokin Joe, 08-17-2007 07:30:48  
If that starter stud/post under the switch is burned n pitted you might get by with a light filing to clean n smooth it up but I agree it sounds like it may need replaced soon or else try n build it back up like Jim was talking about. As always I advise you ro remove, clean n wire brush n reattach each n every battery n starter n ground cable attachment, use 00 gauge cables on 6 volts or 0 or 1 on 12 volts and use a heavy duty battery. It might be time for a shop to check the starter for excess amps maybe from worn bushings or perhaps it needs some brush or commutator work.

John T

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Janicholson

08-17-2007 09:26:53




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 Re: M Starter Switch in reply to Smokin Joe, 08-17-2007 07:30:48  
I agree with Bob below, THere is one other possibility. If your switch is the type that covers a copper stud on the side of the starter, and that stud gets worn down from use, a new switch will not last long befor it is out of motion range. The copper can be built back up to about 1/16" more material whewe it hits by sandwiching a piece of copper to the terminal and silver soldering it on. It usually requires the stud to be removed from the housing to avoid heating the insulator and ruining it. It can also be brazewelded back to height. JimN

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Bob Kerr

08-17-2007 07:48:55




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 Re: M Starter Switch in reply to Smokin Joe, 08-17-2007 07:30:48  
Too many amps going through it. pull the starter and take it to an auto parts store to test it. It may have shorted windings or armature. While your at it if you are running 6 volt, clean every single connection shiny bright.



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