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Minneapolis Moline Tractors Discussion Forum
:

wiring schematic

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montidale

11-10-2011 13:42:47




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Does anyone know where to find a wiring schematic for a 1945 RTU?




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Rich'sToys

11-12-2011 20:48:51




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 Re: wiring schematic in reply to montidale, 11-10-2011 13:42:47  
On mine the on/off switch is to the left, and the light switch is on the bottom.



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Rich'sToys

11-11-2011 14:46:57




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 Re: wiring schematic in reply to montidale, 11-10-2011 13:42:47  
My '45 R has a push/pull switch for the ignition and a separate push/pull switch for the lights. I don't think the lever type ignition/light switch came along till a couple years later.



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montidale

11-12-2011 05:37:55




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 Re: wiring schematic in reply to Rich'sToys, 11-11-2011 14:46:57  
Rich, I think you are right. I called Motec Engineering for a wiring harness and Matt thought this tractor had push pull switches like you say.I went out and looked at the instrument panel on the tractor and you can see the old holes where the lite and mag switches used to be.The instrument panel is layed out different than the one on the link that sunsettractor has. They are different tractors thow.Is the mag switch on the left side or on the bottom? I'll have to try and find an original panel or take out the key switch and weld up the hole. Should be a nice winter project. Thanks for all the info, Dale

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glgrumpy

11-11-2011 09:06:52




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 Re: wiring schematic in reply to montidale, 11-10-2011 13:42:47  
That's right diagram for 6-volt un-changed system. Positive ground on all 6-volt MM's, even some 12 until constellation series in mid 50's. Notice that in diagram. AND, even coil is plus to dist., opposite of what you may be used to. Will still work with neg ground, ammeter will read backwards and gen may have issues if incorrect.



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sunsettractor

11-10-2011 19:52:44




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 Re: wiring schematic in reply to montidale, 11-10-2011 13:42:47  
third party image

I dont know if this is specific to your tractor, but as it says on the diagram, MM letter series tractors. This diagram seems to be correct for my "50 ZA.



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montidale

11-11-2011 07:39:35




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 Re: wiring schematic in reply to sunsettractor, 11-10-2011 19:52:44  
Thanks for the drawing. That should give me a good starting point for rewiring this tractor. By the way do you Know if a 45 RTU was neg. or pos. ground. The tractor has a three position keyed switch, I'm assuming off/on/lights like in the schematic. Do you know if they origanaly had a key switch or a switch with just a knob? Thanks again Dale L.



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sunsettractor

11-11-2011 10:02:22




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 Re: wiring schematic in reply to montidale, 11-11-2011 07:39:35  
All Of the Molines I have seen from this era used a large round lever type switch.I saved this thread from the forum showing both sides of the installed switch on a restoration in progress, this type of switch is available from many vendors, including JD, Stieners, Napa, ect. If your interested, Moline parts.com has nice wireing harness' pretty reasonable as well, Hope this helps...tom

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