There is a tab on the sender that goes into a notch on the tank hole. IIRC, it is dead top at 12 O'clock position. It is possible to get the sender in with it in the wrong place. Just a little extra force will bend the tab in is all it takes.
ALWAYS use a new SEAL. Ask for one for an 87-88 Eagle if they don't list your Concord. The lock ring and seal were $12 at Advance Auto 2 months ago. I would have used an AMC vendor but I put it off till the last minute and AA got it next day.

Sent from my BlackBerry® wireless device from U.S. Cellular

-----Original Message-----
From: Richard Estermyer
Sender: amc-list-bounces@amc-list.com
Date: Mon, 26 Jul 2010 07:35:39
To: amc mail
Reply-To: "AMC, Rambler, Nash, Jeep and family"
Subject: [AMC-list] gas sending unit

I replaced the tank in the 5 speed Concord wagon a few months back and didn't use the new seal so I have to replace that. Anyway, it appears that there is a certain way to install the sending unit, as now the gauge needle shows 3/4 tank when full and it didn't before changing.

Anyone know IF there is a certain direction that the sending unit should go when I replace the seal? THANKS! SEE YOU AT AMO NATIONALS!

Blessings,
Richard
Richard Estermyer

God determines who walks into your life....
It's up to you to decide
who you let walk away,
who you let stay, and
who you refuse to let go.

AMO Nationals 2010
The American Dream
Detroit, Michigan
August 12th-14th
www.greatlakesamc.org

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" From: "Armand Eshleman"
"
" Going through the fuel sending unit for the white Javelin.
"
" The resistance range when the float is moved is 45 ohms with the
" float at full droop to 10 ohms at full float. Measured using a digital
" meter.
" Does that sound correct to you guys?

roughly. i'd expect it to be higher than 45 but the tolerance is
probably pretty loose.
________________________________________________________________________
Andrew Hay the genius nature
internet rambler is to see what all have seen
adh@an.bradford.ma.us and think what none thought
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Thanks Mr. Sandwichmaker for the reply. I think I'll put it back into the
tank and try it.
It's gonna be a while yet before that gets done though. Gotta wait for
warmer temps so I can apply the
protective coating to the tank. I guess if the thing don't work correctly, i
can always purchase a new one.

Thanks again,
Armand

>
> roughly. i'd expect it to be higher than 45 but the tolerance is
> probably pretty loose.
> ________________________________________________________________________
> Andrew Hay the genius nature
> internet rambler is to see what all have seen
> adh@an.bradford.ma.us and think what none thought
> _______________________________________________

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9-10 ohms at full is correct. Should be 70-75 ohms at empty. The stated range is 9-73 ohms, but these are "5%" gauges. They can be +/- 5% of the low/high value, so 8-10 ohms at full (or hot on the temp gauge) or 69-77 ohms at empty (or cold). There should be a 60-70 ohm difference, so you've got a broken coil if only reading around half that much. The sending unit must be replaced. The rebuilt replacements can be a bit pricey. You can make a universal sending unit fit by striping the original off and leaving just the mounting plate, then removing the universal unit from its mount and securing it to the original plate.

I use a http://www.jcwhitney.com/adjustable-fuel-level-float/p2005714.jcwx?skuId=162409&filterid=j1 for this. The cheaper ones are 33-240 ohms and of course won't work.

------------------
Date: Tue, 22 Mar 2011 13:49:57 -0600
From: "Armand Eshleman"

Going through the fuel sending unit for the white Javelin.

The resistance range when the float is moved is 45 ohms with the
float at full droop to 10 ohms at full float. Measured using a digital
meter.
Does that sound correct to you guys?

The car does have the low fuel warning light

--
Frank Swygert
Publisher, "American Motors Cars"
Magazine (AMC)
For all AMC enthusiasts
http://www.amc-mag.com
(free download available!)

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Thanks Frank,

The information is much appreciated. Now I gotta decide if I can make this
work some how or need to get a new one.

Armand

----- Original Message -----
From: "Frank Swygert"
To:
Sent: Wednesday, March 23, 2011 5:21 PM
Subject: Re: [AMC-list] sending unit

> 9-10 ohms at full is correct. Should be 70-75 ohms at empty. The stated
range is 9-73 ohms, but these are "5%" gauges. They can be +/- 5% of the
low/high value, so 8-10 ohms at full (or hot on the temp gauge) or 69-77
ohms at empty (or cold). There should be a 60-70 ohm difference, so you've
got a broken coil if only reading around half that much. The sending unit
must be replaced. The rebuilt replacements can be a bit pricey. You can make
a universal sending unit fit by striping the original off and leaving just
the mounting plate, then removing the universal unit from its mount and
securing it to the original plate.
>
> I use a
http://www.jcwhitney.com/adjustable-fuel-level-float/p2005714.jcwx?skuId=162409&filterid=j1
for this. The cheaper ones are 33-240 ohms and of course won't work.
>
> ------------------
> Date: Tue, 22 Mar 2011 13:49:57 -0600
> From: "Armand Eshleman"
>
> Going through the fuel sending unit for the white Javelin.
>
> The resistance range when the float is moved is 45 ohms with the
> float at full droop to 10 ohms at full float. Measured using a digital
> meter.
> Does that sound correct to you guys?
>
> The car does have the low fuel warning light
>
>
> --
> Frank Swygert
> Publisher, "American Motors Cars"
> Magazine (AMC)
> For all AMC enthusiasts
> http://www.amc-mag.com
> (free download available!)
>
> _______________________________________________
> AMC-list mailing list
> AMC-list@list.amc-list.com
> http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com

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