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Farmall & IHC Tractors Discussion Forum
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Super A Wiring - Charging ?

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SuperA-Tx

11-24-2006 13:00:57




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I hooked the wires up like Bob M has in his diagrams for a Super A that has been converted to a 12 volt (photo 11 of 16). Everything worked fine but after I got a new AM meter you could tell it was not getting a charge to the battery and in fact would run down after you started it a few times. I took the tractor to a mechanic and he hooked up a jumper to the #1 post on the alternator and then it started charging. Sat it at the store for a while and then I saw it was discharging all the time and again the battery was dead. I took the jumper wire off that the mechanic had installed and jumped the tractor off with jumper cables. Low and behold it showed it was charging. So I ended up with it just like I started out with but now it worked. Why? Did the jumper wire polorize it or something.

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SuperA-Tx

11-24-2006 14:53:35




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 Re: Super A Wiring - Charging ? in reply to SuperA-Tx, 11-24-2006 13:00:57  
Started it again and it didnt charge so I hooked the jumper back up the mechanic added and it started back charging again. Cant leave it hooked up tho cause it discharges when its not running. If you unhook that jumper cable then it keeps on charging when running.

I am stumped.

So now I am thinking I need a new alternator.



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Hugh MacKay

11-24-2006 18:39:39




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 Re: Super A Wiring - Charging ? in reply to SuperA-Tx, 11-24-2006 14:53:35  
Mike: I think I've go that right, too many of you guys for this old head to keep straight.

I run all my conversions with jump wires. My first alternator conversion was Super A using a delco 6 volt alternator, yes and keeping the tractor 6 volt. When you go alternator, a Super A has an extra wire in the harness. I use that wire for my jump wire right back to the dash where I drilled a hole and installed a starter type push button switch. When the tractor starts, just hit the push button to excite the alternator. When tractor is not running this insures no battery drain. On the 6 volt conversion, no one was able to sell me what I needed to do otherwise.

When I did my 130 and 12 volt alternator, I couldn't get the exact light or diodes Bob recomends, thus it didn't work very well. Went to another supplier, still no luck getting right lamp. 130 has the extra wire in harness also, thus you know what happened next. Actually my time frame on the 130 is longer than the wording sounds. I fooled with that one close to a year before going push button.

When it came to doing 140, it was jump wire and push button all the way.

I still use the old amp gauge, thus when I hit the button, by watching amp gauge as I do it, I know it's charging. I haven't had a dead battery since, nor have I had to buy any bulbs, diodes, etc. These have been exceptionally trouble free for me.

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SuperA-Tx

11-24-2006 20:01:07




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 Re: Super A Wiring - Charging ? in reply to Hugh MacKay, 11-24-2006 18:39:39  
Heck, Hugh, name is Randy, geeez. LOL

But you got the jest of my post.

Its like you have to "excite" it to get it charging then its fine. Well, Im not one for excitement so this thing has to get fixed some other way.



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Hugh MacKay

11-26-2006 03:43:13




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 Re: Super A Wiring - Charging ? in reply to SuperA-Tx, 11-24-2006 20:01:07  
Randy: My apologies on not getting the name right. In all fairness, you guys use handles on YT then e mail me using your real name. By times it does get a weeeee bit confusing, especially when I get about 50 e mails per week, many of them from folks we never see on YT. Having said this, a lot of parrents in the past 60 years have over used certain names. Just for example, "Hugh", in my 6 years at YT, I don't think I've seen more than 1 or 2 people use that one. There are a lot of Randy's and Mike's, in fact they are here by the bushel, "just the name tag," not suggesting you guys are tiny.

On your charging problem, I only used small lamps and diodes for about a year on one tractor. Now, I'm willing to bet money I have 1,000 times the minutes in that one year, as I have in my 3 push buttons, lifetime, and two of those now have 15 years on them. I don't know about you, but something that usually doesn't work gets me far more excited than pushing a buttom every time I start the tractor. Besides, my SA never excites on it's own, 130 does about 50% of times and 140 about 90%. You suit yourself, I'll stick with the items that work 15 to 25 years without repairs or parts.

Don't get me wrong, Bob M has an excellent system if you can find a supplier, that sells the percise diode or light. I will however chalange, it is not as trouble free as my system. These are 1950s tractors, they do need warm up time, thus there is ample time to push the button. It's not like your modern auto, whereby you can pull it in drive quicker than you can get your hand from the ign key to the shift lever, and be down the driveway before the starter stops turning.

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Sam#3

11-25-2006 19:39:54




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 Re: Super A Wiring - Charging ? in reply to SuperA-Tx, 11-24-2006 20:01:07  
I saw your post last night but I didn't have time to send a reply.
Over time you'll see several ways to solve the excite/discharge problem you're having. What was installed on my Case when I acquired it is as follows:
(1) Run a strap from the alternator output to pin (2).
(2) Plumb a tee into the oil pressure gauge port and install a normally open (NO) oil pressure sender (use a low pressure switch) switch in one side and the gauge pipe in the other.
(3) Run another wire from the alternator output to one side of the switch.
(4) Run a wire from the other side of the switch to pin 1.
When the engine starts and the oil pressure comes up the switch will close battery to pin (1) and excite the alternator. When engine is stopped the oil pressure drops and the battery is removed from pin (1) so no drain.

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