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Altenator question Farmall H HELP

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MagMan

05-21-2005 12:03:49




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Hi guys I have a farmall H with what I believe is a GM altenator under the hood. it fits with no cut out or having to unhook the hood. it has a wire for the return charging and then a plug in with two wires. One of the pigtail wires goes to the charge stud and the other goes to a on off switch then the charge termenal wire goes to the battery directly. OK now this is the problem. If I dont turn the push pull switch on Re: the wire that goes to the plug in on the alt it does not make any difference still charges. But if I leave the wire hooked to the battery it shows a small discharge and runs the bat dead. That wire goes from the bat directly to the stud on the alt.Any Help would be apreatiated.iT DOES CHARGE OK WHEN RUNNING THOUGH JON

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Brian in Ne

05-22-2005 06:31:38




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 Re: Altenator question Farmall H HELP in reply to MagMan, 05-21-2005 12:03:49  
I converted mine to a single wire so you don't have to worry about all the other wires.
When doing this you will also want to put a low speed cut in and maybe a smaller pulley on the alternator so you won't have to open the engine up all the way to exite the alternator.



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Hugh MacKay

05-22-2005 02:35:18




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 Re: Altenator question Farmall H HELP in reply to MagMan, 05-21-2005 12:03:49  
Jon: I have the same setup on all 3 of my tractors, rather than an on-off switch, I use a push button starter type switch. The part I like with push button switch, there is no danger of leaving it on, thus getting back feed. After starting tractor, all I need do is hit that push button to excite alternator. I always watch amp gauge as I do this, the reason being if battery was at full charge before starting, it will probably only show full charge for about 90 sec. or less.

My Super A was the first I changed to alternator, a 6 volt alternator. Matching up diodes, lights, etc. for 6 volt would have been next to imposible. I did my 130, 12 volt basically to Bob Ms diagrams. Seemed like every few months something on this system failed. In all fairness to Bob's diagrams, I don't think I was ever able to buy the proper light. Sometimes tractor would shut down while other times not. Two years ago I decided if Super A on 6 volt alternator has 10 years in and working well, why not use the same system with 12 volt. 130 got changed to push button switch. When I did 140 last year, 12 volt alternator and push button switch from day one.

I like this system, basically foolproof, because you must hit that switch to excite alternator, one tends to pay more attention to the system and how well it is working.

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matthies

05-21-2005 20:38:39




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 Re: Altenator question Farmall H HELP in reply to MagMan, 05-21-2005 12:03:49  
They make a pigtail for the two wires that has a diode in one wire so you battery doesn't go bad. Just go to any implement dealer and ask for one. chris



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MagMan

05-21-2005 14:26:11




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 Re: Altenator question Farmall H HELP WHAT AM in reply to MagMan, 05-21-2005 12:03:49  
I dont see a link for Bob Ms site. How do I tell what termanel is witch. it has a 194 light hooked with only one wire and I did not see where it worked so I took it out I took the dist off and put a mag on there is no factory wiring left just a large green wire going to a amp guage on the bat then a wire going to the pos on the bat. then like I said there is a push pull switch and one wire goes from the double termenal on the alt to that and one going to the pos bat. then the other of the double terms on the alt go to the bat on the alt. So where does the idiot light hook one too the wire from the double termanel on the alt and the other side goes where? Sorry I have done this before but due to some health issues I cant remember what I did or how. Its pretty bad when I used to be a auto electriction and wiring tech huh. JON

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Bob

05-21-2005 14:36:35




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 Re: Altenator question Farmall H HELP WHAT AM in reply to MagMan, 05-21-2005 14:26:11  
third party image

The MAD site I linked shows the #1 and #2 terminals. You must have missed them!

This is from that site:



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MagMan

05-21-2005 14:57:37




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 Re: Altenator question Farmall H HELP WHAT AM in reply to Bob, 05-21-2005 14:36:35  
Thanks Bob I saw that pic but it did not have the same position as mine so I kept going. Would it matter if the Bat was on the 3:00 position instaead of the 11:00 like the pic.or will they be reversed. would a pic help of my alt? JON



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Bob M

05-21-2005 17:11:15




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 Re: Altenator question Farmall H HELP WHAT AM in reply to MagMan, 05-21-2005 14:57:37  
Hey Magman - Punch below for the wiring diagram. It'll show you what gets wired to #1 and #2 aux terminals.

Note! The Delco 10SI alternators are all identical regardless of where the terminals are located relative to the adjuster bolt lug. They all get wired the same. (The rear end of the these alternators can be set in any one of 4 positions 90 deg apart simply by removing the four case screws, and then turning the back half as required and reinstalling the screws.)

Post back if you still have questions! ...Bob M

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MagMan

05-21-2005 18:08:27




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 Re: Altenator question Farmall H thanks Bob M in reply to Bob M, 05-21-2005 17:11:15  
Thanks Bob M, Thats what I was looking for. I think between your diagrahm and the other bobs info and site I printed it off and think I will be able to handel it. I have put GM wiring and 194 bulbs in before for idiot lites on when not charging and go off when it charges. I see you diagram has a lite but if you know what I am talking about with the GM pig tail It would be if you cut a running lite or licence plate light bulb and termanel . You cut the two wires about a foot long that hook to the bulb termanel.Where would the second wire go to complete the circuit? I know one goes to the #1 termanel but how about the other? remember I put a mag in and took the dist out so there is no wiring there for that anymore. THANKS JON

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Bob M

05-21-2005 18:51:32




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 Re: Altenator question Farmall H thanks Bob M in reply to MagMan, 05-21-2005 18:08:27  
OK Jon - the other end of that lamp pigtail needs to go to a SWITCHED 12 volt source (one that goes off when you shut down). Could use a simple toggle switch here, but you gotta remember to shut off the switch when you shut down the tractor.

Another option is to use a DPDT switch to combine the alterator control with the mag kill switch function (punch below for a diagram).

Or you can install a normally open oil pressure switch (the switch contacts CLOSE on sensing oil pressure). Use that to switch the voltage to to the warning light. ...Bob M

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little john

05-21-2005 13:00:17




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 Re: Altenator question Farmall H HELP in reply to MagMan, 05-21-2005 12:03:49  
And here's the address of Bob M's excellent wiring diagrams.....might be of some help.

Good luck.



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Bob

05-21-2005 12:13:18




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 Re: Altenator question Farmall H HELP in reply to MagMan, 05-21-2005 12:03:49  
The wire connected to the terminal labeled "1" (EXCITE) needs to be powered down at shutdown to prevent draining the battery.

The #"2" terminal (Voltage Sense) can remain "HOT" at all times.

Usually, the wire to the #1 terminal will have an indicator light ("idiot light"), resistor, or diode connected into it to prevent backfeeding of power from the alternator into the ignition system (if the tractor is equipped with battery ignition), or the possibility of damage to the alternator under certain conditions.

Here's a link to a site with TONS of info on the Delco alternators:

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