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Farmall & IHC Tractors Discussion Forum
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Wireing diagram for converting 300 to delco alt?

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Kelly C

12-17-2004 22:31:38




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I saw a wiring diagram on here once. I purchased a rebuilt Delco alt with a wiring harness. A new ing switch and a new light switch. Havent got a clue how to wire the thing. For some reason I have this Dumb chip that kicks in when ever I deal with electronic stuff. You know me though not knowing what I am doing has never stopped me before.




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Hugh MacKay

12-18-2004 15:12:03




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 Re: Wireing diagram for converting 300 to delco al in reply to Kelly C, 12-17-2004 22:31:38  
Kelly: You are going to have trouble getting that GM Delco alternator to fit under hood of 300 and still give you room for belt adjustment. There are smaller alternators out there that will work much better. I have seen dozens of 300 with bottom hood mounting bolt on right front missing, and we all know why. What you need is an alternator from Nissan or Toyota, etc.



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Kelly C

12-18-2004 18:24:25




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 Re: Wireing diagram for converting 300 to delco al in reply to Hugh MacKay, 12-18-2004 15:12:03  
third party image

I have the new Alt sort of installed. I still have to make a bracket to adjust the belt. But as it sits that belt is plenty tight and I think the tin will fit. If not I guess I can rummage around the junk yard for a honda. Hey I have a Izuzu pick up in the other barn. i wonder how big that Alt would be?

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F-Dean

12-18-2004 19:20:04




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 Re: Wireing diagram for converting 300 to delco al in reply to Kelly C, 12-18-2004 18:24:25  
Try flipping the bracket. When I put a Hitachi Alternator on my M, flipping the bracket up made the belt the correct length.



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Allan in NE

12-18-2004 07:11:32




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 Re: Wireing diagram for converting 300 to delco al in reply to Kelly C, 12-17-2004 22:31:38  
Kelly,

Yeah right. Dumb chip like a darned fox!

What did you say you gave for the NH 851 baler again? :>)

Allan



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Kelly C

12-18-2004 14:27:06




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 Re: Wireing diagram for converting 300 to delco al in reply to Allan in NE, 12-18-2004 07:11:32  
Thats a NH850 and it was $600.



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F-Dean

12-18-2004 06:23:35




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 Re: Wireing diagram for converting 300 to delco al in reply to Kelly C, 12-17-2004 22:31:38  
Double check what gound the alternator needs. When you put a Hitachi alternator on a "M" you have to switch to a negative ground.



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Kelly C

12-17-2004 23:20:43




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 Re: Wireing diagram for converting 300 to delco al in reply to Kelly C, 12-17-2004 22:31:38  
Found Bob M's Diagrams for the wireing. Thanks Bob!!!
Question though. If I use a new 12 volt coil do i still need to use the resistor between the Alt and the coil?



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Bob M - nope!

12-18-2004 06:41:09




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 Re: Wireing diagram for converting 300 to delco al in reply to Kelly C, 12-17-2004 23:20:43  
Kelly - If you install a 12 volt (internally ballasted) coil the external resistor is not needed! ...Bob M



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