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Farmall & IHC Tractors Discussion Forum
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6 - 12 volt question......

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Jim

04-27-2004 15:58:26




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I have a Super A converted to 12V. Magneto push/pull. One wire. #2 terminal is jumped to BAT terminal, BAT terminal hooked to ammeter gauge. #1 was left unhooked, and it charged fine for years. Altenator died. Took the alternator to the shop, and dude said he doesnt know how some people make them work like that, but they do. Bob M who posted on 4/19/2004, I went to your wiring diagrams and its exactly like the "12V alternator w/mag ignition & oil pressure control drawing" but it was working without an oil pressure switch. Now that I got the rebuilt altenator on, it will charge only if I "energize" the #1 terminal.
Question: How will I get it to work without running more wiring and a switch? The super A doesnt have an oil pressure switch. It worked before!!! Why not now??? Oh well, thanks to anyone who can help me. Jim.

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Bob

04-28-2004 07:39:37




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 Re: 6 - 12 volt question...... in reply to Jim, 04-27-2004 15:58:26  
Most likely, the alternator guy replaced the non-funcioning one-wire regulator you had with a standard regulator that requires excitation voltage to the #1 terminal to get it to charge.

Here's a link to a low-rpm one-wire regulator on ebay.

Link

(I have no connection to this auction, and, obviously there are other sources for this item.)

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Pete

04-27-2004 19:06:14




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 Re: 6 - 12 volt question...... in reply to Jim, 04-27-2004 15:58:26  
Jim...I replaced the generator on my Super A with a 12 Volt one wire alt (10SI) last fall and I ran into a similar problem. With the first alt I installed...it "turned on" OK for a few days and then it began to be harder and harder to turn on. I had to rev the engine all the way up and finally it stopped turing on altogether. I took the alt back to the store and they gave me another, but that alt also only turned on if I reved the engine high. I did not want to put in a push button or oil gauge, or live with having to remember to rev the engine, so went over to ebay and bought a new internal regulator for the alt that turns the alt on a LOW engine rev. That solved my problem and I'm now very happy with the alt set-up. Cost me about $20 bucks for that special internal regulator and installation was easy. The prime reason I wanted to replace the generatorin in the first place was to get away from the unreliable point type regulators used with generators. (to bad no one sells just a solid state generator regulator replacement).

Pete

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Hugh MacKay

04-27-2004 17:27:55




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 Re: 6 - 12 volt question...... in reply to Jim, 04-27-2004 15:58:26  
Jim: I have a Super A 6 volt and 130 and 140 both 12 volt. All three tractors have alternators. Also on all three tractors I have a push button type switch for energizing the alternator. Everyone of my tractors had an extra wire in the harness that wasn't going to be used for anything, when I changed them from generators to alternators. I drilled a hole on dash just under the fuse holder for lights, and that hole is for push buttom switch.

Sometimes my tractors energize the alternator on their own, if they don't it is one quick push of the button. I have 12 volt coils on 130 and 140. I don't have to bother with diodes, resistors, lights, etc. The Super A on 6 volt is now into its 11th year with the same battery, alternator, etc. I live in Canada and see lots of cold weather starts. These setups are just about as trouble free as they come. I can also tell you if it weren't for a couple of 12 volt motors I have, these tractors would all have 6 volt alternators. If 3 guys went in my shop at -20F temp, and each one started a tractor, the guy on the Super A would be going first.

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jamie

04-27-2004 16:18:04




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 Re: 6 - 12 volt question...... in reply to Jim, 04-27-2004 15:58:26  
Did you use the same alternator or a different number? Was it a self-exciting alternator? Same pulley size?



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jamie

04-27-2004 16:17:40




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 Re: 6 - 12 volt question...... in reply to Jim, 04-27-2004 15:58:26  
Did you use the same alternator or a different number? What is a self-exciting alternator? Same pulley size?



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Jim

04-27-2004 16:35:26




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 Re: Re: 6 - 12 volt question...... in reply to jamie, 04-27-2004 16:17:40  
It is the same alternator that came off the tractor.



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