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Case Tractors Discussion Forum
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51 vac wiring

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kent

04-12-2004 06:10:12




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I have searched the history and am still stumped - I ave a 51 vac and put a new generator on it and new cut out, but cannot get it to charge. I have polarized the generator and wired it as best I can tell by the diagram in the parts book (which leaves a lot to be desired)

It is a 6 volt system and a wire goes from armature to cutout- from cut out to ammeter -ammeter to kill switch- kill switch to starter button -and then to battery

other side of kill switch goes to coil and then distributor

positive ground system with negative cable going to starter swith then to starter

It runs fine and starts if I charge the battery but will not charge the battery on its own

Do i have to have a light switch - is there a way around a light switch (it didnt have one on it when i got it)

Thanks for your help Kent

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mj

04-13-2004 09:46:13




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 Re: 51 vac wiring in reply to kent, 04-12-2004 06:10:12  
The function of the original light swich on tractors equipped with cut-out controlled generators is as follows: "Amperage output is controlled by the light switch, which has three operating positions. The first position (lights off) connects in the resistance and reduces generator output to 3 amperes. The second position (lights off) allows full generator charge. The third position (lights on) also allows full generator charge.". This switch also contains a 15 ampere fuse or the lights. If you don't run an original light switch you could replace it with a single or double-pole, double-throw toggle switch, a fuse and appropriate resistance to limit the charging rate. The resistance is used to prevent overcharging and could be eliminated by the use of a single switch to turn generator output on and off BUT you run the risk of forgetting to choose (or mis-judging) the appropriate mode for battery condition. In that case a septarate on-off switch would be needed for the lights OR you could use the lights to damp the output when you had the other switch in charge position which would give you 'off-no lights or charge' and 'on-lights on and full charge'. I'd say that if you're staying with the cut-out then you should run the original light switch. If you are not going to stay original then go with a simple light switch and a regulator-controlled generator, or alternator for 12v conversion.

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Lew

04-12-2004 21:18:45




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 Re: 51 vac wiring in reply to kent, 04-12-2004 06:10:12  
What you refer to as a "kill" switch is really an ignition switch. A kill switch is used in magneto systems to ground out the ignition to stop the engine. An ignition switch connects the battery to the coil to run and opens that circuit to stop. The ignition circuit goes from the negative post of the battery to the ignition switch then to the coil then dist. then to ground. The starter circuit goes from the negative post to the start button to the starter then to ground. The charge circuit goes from the armature thru the cutout relay to the ammeter to the battery. The other post on the generator needs to go to ground through some resistance found in the light switch. Without a light switch you can manually ground that terminal and you should get "FULL" charge. Do not run it very long that way as you could cook the battery or even fry the generator.

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Warren

04-12-2004 08:58:42




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 Re: 51 vac wiring in reply to kent, 04-12-2004 06:10:12  
Hey,

You need the light switch. It contols voltage
to your battery. Let me know if you need one and I can dig up the info on where I bought mine. Also, I finally figured out the wiring. Let me know if you need the info on that too. Include your email in the reply.

Warren



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kent

04-12-2004 12:07:25




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 Re: Re: 51 vac wiring in reply to Warren, 04-12-2004 08:58:42  
that would be helpful - email info on how to hook and a source for light switch to [email protected]



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Art

04-12-2004 06:32:16




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 Re: 51 vac wiring in reply to kent, 04-12-2004 06:10:12  
the light switch has three positions...All the way in, and the the lights are off, and no power is sent from gen. to batt..One click out, and the gen send power to recharg the batt, and the lights are still off, and all the way out, the lights are on, and power is sent to batt...Sounds like you need a whole light switch I don't know what to do w/ the wires if you don't have a switch....Also Look about 4 pages back fom here on this board for a question from Warren, and it will explain how the wires go...Hope this helps...

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