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How to debounce new fuel gauge.


 
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4x4dually
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Joined: 19 Nov 2007
Posts: 39
Location: Stillwater OK

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PostPosted: Fri Oct 13, 2017 11:45 am    Post subject: How to debounce new fuel gauge. Reply to specific post Reply with quote

I bought a replacement fuel gauge from a non-"yesterday's tractor" company (I know, shame on me) P/N JDS781. It's a 12V neg ground setup on a '68 4020 with the older 0-30 ohm sender.

The new gauge bounces like hell due to fuel slosh. Is this typical for a new gauge, is there a gauge out there that is dampened internally, or is there something I can do to de-bounce it?

Annoying as hell at 1/4 tank...it just slams the needle on the post and back and forth.

Advice?

Thanks in advance.
 
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matthies
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PostPosted: Fri Oct 13, 2017 1:13 pm    Post subject: Re: How to debounce new fuel gauge. Reply to specific post Reply with quote

Might need to replace the sender.
 
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ss55
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Joined: 05 Dec 2011
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PostPosted: Fri Oct 13, 2017 1:55 pm    Post subject: Re: How to debounce new fuel gauge. Reply to specific post Reply with quote

It's possible that a 45 to 53 year old sender is worn and no longer linear. How stable was the old gauge before it quit working? Fuel slosh is the worst when the tank is near empty. Our rule used to be "When the fuel gauge stops bouncing it's time to head for home". Before spending more money on parts, try filling the tank to full and watch how the gauge works at different levels.
 
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tim s
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Joined: 01 Nov 2008
Posts: 11518
Location: Somerset Ohio

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PostPosted: Fri Oct 13, 2017 1:58 pm    Post subject: Re: How to debounce new fuel gauge. Reply to specific post Reply with quote

Ditto on the sender, it is probably all wobbled out..
 
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4x4dually
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Joined: 19 Nov 2007
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Location: Stillwater OK

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PostPosted: Mon Oct 16, 2017 3:21 am    Post subject: Re: How to debounce new fuel gauge. Reply to specific post Reply with quote

It didn't do this when the old gauge took a dump, that's the only reason that I didn't want to blame the sender.
 
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