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6V question

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Keith

04-24-2002 18:52:16

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I sure hope that somebody on this helpful discussion board could point me in the right direction. Here is the problem/question:
The 6v. battery gave up the ghost and was replaced with a brand new 6V battery. Stupid me did the install and hooked it up with a negative ground. The 8n started up and ran fine. I realized my error about 10 minutes later and shut off the tractor. Now what? Do I just hook up the battery with a positive ground? do I have to re-polarize the generator? Did I possibly cook the voltage regulator? Is there a check to verify positve or negative generator output? And finally if I have to polarize the generator what is the best way to do it?

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Dell (WA)

04-24-2002 19:27:26

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Re: 6V question in reply to Keith , 04-24-2002 18:52:16

Keith..... ....welcome to the club (don't ask)

As you found out starters don't care positive or negative ground, they still turn the correct way.

You might get lucky on your voltage regulator, but I wouldn't bet on it.

You can never polarize your VR too many times. So now with a positive grounded 6 volt battery, momentary touch the BAT term to the GEN terminal at the voltage regulator. This allows a momentary flow of current through the generator, which will establish correct polarity. Do this without the engine running.

Now start your engine and observe wheather or not your ammeter is indicating a charge. If not, do another polarization with engine off. (ignition switch don't matter) If 2nd polarization doesn't take, bite the bullet and get the appropriate matching NEW voltage regulator. ..... ..Dell

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Keith

04-26-2002 03:46:59

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Re: Re: 6V question in reply to Dell (WA), 04-24-2002 19:27:26

Thanks for the help Dell. I followed your instructions and advice and everything seems to be working fine. I do have one more question though. The ammeter needle is at "zero" indicating no charging or discharging. Keeping in mind that this is a fresh battery, does this indicate that my VR is OK?

Thanks again,

Keith

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Dell (WA)

04-26-2002 09:57:59

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Re: Re: Re: 6V question in reply to Keith, 04-26-2002 03:46:59

Keith..... ..."0" ammeter reading with engine running doesn't sound good.

Check with engine not running. Turn ignition on, should read about 3 amps discharge. Or turn headlights on, if ya gotts'em, should read about 8 amps discharge. Does the ammeter needle even wiggle? Did the ammeter even work before?

As I said, you might be lucky and your VR excaped damage from your miss-installed battery, but I really wouldn't bet on it.

Used to be, real automotive generator repair shops could check voltage regulators and adjust them. Now-adays, cheaper to chuck'em..... ...Dell

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Keith

04-26-2002 19:14:18

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Re: Re: Re: Re: 6V question in reply to Dell (WA), 04-26-2002 09:57:59

Dell,
With the engine off and the headlights on the ammeter needle moves in the + (positive) direction! I looked at the back of the ammeter and there aren't any "hardwired" connections. The connection must be inductive as the wire (with insulation) appears to pass through two steel rings which are integral to the ammeter. I am somewhat confused by the positive reading on the ammeter could the wire be routed backwards through the ammeter. Aside from this strange reading everything else appears to be functioning OK. Any other ideas?

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