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Tractor Talk Discussion Forum

4010 fuel guage

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4010rlw

03-24-2007 06:46:43




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I have a 4010 diesel converted to 12 volt system. The fuel guage does not work so I got a new one and a sending unit. However, when I install it, the needle goes hard right - indicating the tank is full (I know it is not since the fuel level is below the hole to install the sending unit). I've double checked the terminal connections so they all look fine. The only other thing I noticed is when the sending unit is out of the tank, nothing registers on the gauge. When I install the sending unit, it moves hard right. Further, when I disconnect the sending unit lead wire, it returns to the left - indicating an empty tank. Then, if I touch the sending unit lead wire to the tractor frame (or another grounding point) the needle moves sharply to the right again. From this, it appears as if the sending unit is "grounding itself." But, then again, when the unit is not in the tank, I get no needle movement.

Anyone out there experienced this before or have any ideas as to what I can do? Thanks for the help.

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johndeerejon

03-24-2007 10:56:33




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 Re: 4010 fuel guage in reply to 4010rlw, 03-24-2007 06:46:43  
gotta say RustyFarmall is right. you do have a
defective unit.



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4010guy

03-24-2007 07:33:42




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 Re: 4010 fuel guage in reply to 4010rlw, 03-24-2007 06:46:43  
I got 2 of them old girls and i just use a fork handle,,,And it works every time.;o)



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Drill

03-24-2007 07:13:45




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 Re: 4010 fuel guage in reply to 4010rlw, 03-24-2007 06:46:43  
The fuel gauge system works on the ground side of the electrical system. When you ground out the sending wire the guage should go to "full". Most guages aren't that accurate any way.

With the sending unit out of the tank connect the sending wire to the guage, run another wire from the sending unit to a good ground on the frame of the tractor, then move the float through its full movement and see if the guage follows it, if it dosen't then its probably the sending unit.

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RustyFarmall

03-24-2007 07:00:08




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 Re: 4010 fuel guage in reply to 4010rlw, 03-24-2007 06:46:43  
You have a defective sending unit. Take it back and get a good one.



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