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  #21  
Old 06-20-2019, 08:18 PM
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ol'George ol'George is offline
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Well now that really muddies the water,
I did more tests.
I found another amp gauge that was a little more accurate and sensitive.
It showed that when putting the plate on the coil, that it did decrease amp draw but was more of a quick fluctuation and barely showed a difference in draw.
So I did a temp check,
after an hour, it got too hot for my dainty hand to touch @ *130 with plate to coil, using just a dial temp gauge I use for ac work not a calibrated one.

What surprised me was with driven plate removed mimicking a large, out of speck air gap, after another hour passed, no magic smoke and the temp at the same *130 as the previous test.
So have I busted another myth, or just created more questions?

Important thing is op has a working pto with no cost.
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Old 06-20-2019, 08:25 PM
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Quote:
Originally Posted by Rmowl View Post
The gaps were way out. Got them to .010. Here’s a picture of the amp meter before adjustment with lights on (LED) and PTO on. Bottom picture is with gaps adjusted, lights and PTO on, wide open. Thanks for the help all!
here I go again
If your engine is at full throttle you should show a charge, not a discharge on the gauge.
Now I'm going to a quiet corner and take up drinking, fall asleep and dream of something exciting.
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  #23  
Old 06-20-2019, 09:13 PM
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Quote:
Originally Posted by ironman View Post
I respectively need someone to explain to me how that happens.

In my way of learning, the coil of the PTO is an electromagnet that gets energized when 12 volts and ground are applied to it's windings.
The resistance of the coil windings is fixed and never changes, therefore the current going through it has to remain constant. current = voltage divided by resistance. (I=E/R).
So how does changing the air gap of a passive part in the game cause more current to flow thru the coil, whether it is a thousandth of an inch or a thousand miles. I'm probably wrong but I need it explained to me.

My money is on the windings shorting out, thereby lowering the coil resistance, thus sucking more current and heating the fuse and wire.

I agree with this completely. I was wondering the same thing.
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