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Ammeter Won't Zero

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Russell Meerdin

01-05-2002 08:52:48

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I have replaced the voltage regulator in my Jublilee (six volt). When I started the tractor, the ammeter needle vibrated rather wildly but after a few minutes it seemed to "catch" and remained steady. But when the engine is shut-off, the ammeter needle now is slightly to the right of zero. When running, the meter moves futher right.

Did I fry the ammeter with the new voltage regulator?

Russ Meerdink

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Russell Meerdink

01-06-2002 06:06:52

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Re: Ammeter Won't Zero in reply to Russell Meerdink, 01-05-2002 08:52:48

Thanks for all the advice and suggestions on this problem.

After further investigation based on all your ideas, it appears that Scott may have diagnosed the problem. The needle is "hanging up." By tapping the glass with the side of my fist, it jumps back to zero.

I think I will follow Claus' advice: If its broke but still works, don't fix it!

Thanks for your help.

Russ Meerdink

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kevin

01-05-2002 14:00:54

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Re: Ammeter Won't Zero in reply to Russell Meerdink, 01-05-2002 08:52:48

You really can't "fry" one of those induction ammeters.

If you are certain that you have no parasitic load, and the cable is threaded through in the right direction, AND you don't want to replace it, then just place a SMALL weak magnet on the back with some glue (maybe silicone). Place it near the cable and move it around until you bias the pointer back to zero. It will require some tweaking.

-kb

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I'd do this . . . Dell (WA)

01-05-2002 11:48:56

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Re: Ammeter Won't Zero in reply to Russell Meerdink, 01-05-2002 08:52:48

Russ..... ..pull one of yer battery cables and make certain that you don't have any stray currents shorting out somewhere. If'n meter don't zero, then replace the meter. If'n meter zeros with the battery disconnected, ya gotts an electrical short somewheres that is beyound my ability to prognosticate..... ..Dell, who wonders if'n ya remembered to "polarize" your new requlator?

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Scott

01-05-2002 10:55:56

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Re: Ammeter Won't Zero in reply to Russell Meerdink, 01-05-2002 08:52:48

If you have an original ammeter with the wire running through a loop check if the gasket shrunk from behind the lens and is rubbing the needle.

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Claus

01-05-2002 09:01:44

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Re: Ammeter Won't Zero in reply to Russell Meerdink, 01-05-2002 08:52:48

These are cheap ammeters and do not have a mechanical zero...If it works fine, if not get a new one. There is no reason the ammeter should vibrate unless you remove the battery while running. (Not a good idea)
Happy Motoring
Claus

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