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1951 CASE VAC Electrical Knowledge

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Warren

03-29-2004 09:41:14

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Hey Guys,

My VAC has a generator with a cut-out relay attached. The wires have been gone a long time.
I'm now trying to rewire this thing and it's giving me fits. It's even stumping my cousin that
teaches electronics. The pictorial diagrams I have (ownwers manual, service manual, parts manual) all have different diagrams and are not
real specific when it comes to wiring the generator up and all associated conncetions.
For instance, I bought a 3 pos light switch but we can't figure out which way to connect it
to the ammeter or the generator. And what does the 'F' terminal on the generator go to?
What we need to see is a schematic. Anybody have one? Or could someone take pics of their wiring at the generator to show me the wiring?
We are STUMPED. We even read the article on this
website on 3rd brush generators and still we can go no further.

Thanks in advance,
Warren in VA

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Art

03-30-2004 15:24:53

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Re: 1951 CASE VAC Electrical Knowledge in reply to Warren, 03-29-2004 09:41:14

I'm home now...Don't have a camera, or scanner...so I'll have to try to 'splain it to ya. We'll start off at the starter button, and go through the whole thing. Bottom of starter switch goes to the starter. Top goes to negative on the battery. One wire comes off of the top of the switch and goes to the nearest side of the ammeter. On the other side of the ammeter there are 3 wires and they go to the ignition switch which continues onto the coil, the second has a 15 amp fuse on it and goes to the body of the generator, the third goes to the light switch. On the light switch there are two more wires they go to the lights and the last one goes to the generator cut out switch. Hope this helps.

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Warren

04-02-2004 06:06:42

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Re: Re: 1951 CASE VAC Electrical Knowledge in reply to Art, 03-30-2004 15:24:53

Hello,

Yes this helps very much.

Thanks very much,
Warren

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03-30-2004 12:08:10

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Re: 1951 CASE VAC Electrical Knowledge in reply to Warren, 03-29-2004 09:41:14

Hold on...I've got a VAC out here "as issued". I'll take some pics and post them to my Case Place so you can see them. I'm going to start drawing a schematic for it since this question comes up all the time.

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03-29-2004 15:43:15

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Re: 1951 CASE VAC Electrical Knowledge in reply to Warren, 03-29-2004 09:41:14

Click on the link below for info; then click an image to enlarge and print.

VA Info

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Warren

03-30-2004 11:12:48

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Re: Re: 1951 CASE VAC Electrical Knowledge in reply to mj, 03-29-2004 15:43:15

MJ,
I found where you explained the circuit to someone in April of last year. The only part I see missing that I need is this:

The generator has an 'F' terminal. Does this
get connected to the light switch on the resistor
side?

Thanks,
Warren

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03-30-2004 12:46:55

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Re: Re: Re: 1951 CASE VAC Electrical Knowledge in reply to Warren, 03-30-2004 11:12:48

Yes. You can see it here as it comes out from under the choke cable, loops under the gen. cutout-to-ammeter wire and then down to the light switch bottom terminal. BEFORE you do this check on my info site and look at the generator photo to make sure we're talking about the same thing.

VA info

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Warren

03-29-2004 19:04:03

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Re: Re: 1951 CASE VAC Electrical Knowledge in reply to mj, 03-29-2004 15:43:15

Thanks for responding. I have the same diagram
plus 2 more. Just like this one, it does'nt show
where the field terminal is wired or the batt terminal on the cut-out relay. I have found some other info. This sounds closer.
The field terminal is connected to the right side of the ammeter. The batt out terminal is connected
to the light switch on the terminal located by the resistor. The lights connect to a second terminal and the terminal on the end of the fuse
connects (light switch) to the right side of the ammeter. Sound close?

Warren

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Art

03-29-2004 10:53:18

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Re: 1951 CASE VAC Electrical Knowledge in reply to Warren, 03-29-2004 09:41:14

I believe that the generator is a one wire generator....the switch is all the way in and the gen is not working, one click out and it gen. 12 volts back to the batt, all the way out is lights on,gen 12 volts back to the batt...Good luck Art

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Art

03-29-2004 11:06:05

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Re: Re: 1951 CASE VAC Electrical Knowledge in reply to Art, 03-29-2004 10:53:18

Don't forget that the VAC is a positive GROUND system....

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Warren

03-29-2004 19:05:49

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Re: Re: Re: 1951 CASE VAC Electrical Knowledge in reply to Art, 03-29-2004 11:06:05

This tractor is positive ground but it has a 6 volt system. The generator appears to me to be 2 wires I guess. How do I tell?

Warren

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