Fuel sender

Discussion in 'Mech Tech' started by iblaze, Aug 2, 2019.

  1. iblaze

    iblaze Supporter

    Evening all
    Has anyone fitted one of these vdo senders before?
    How does it connect to the tank and why is one screw longer than the rest?[​IMG]

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  2. mikedjames

    mikedjames Supporter

    It looks fairly universal like (you may have to drill holes in the tank/enlarge the hole in the tank to fix it,) and you will probably need cut the plastic bit down to size to suit the tank, and move the pivot up ..
    So empty is hanging down at lower limit pf movement ? 45 degrees and full is pointing up at upper limit of movement ? 45 degrees. the length of the float arm will need to be set probably by clamping with a set screw so this 45 degrees has the float touching the top of the tank and 45 degrees down doesnt quite touch the bottom of the tank.


    Looking at it logically

    The lower tapped ring with the slot allowing wiggle room to insert it goes inside the tank.
    Use a screw to hang onto it, screw it down a bit..
    The first rubber gasket would then sit on top of the tank.
    Then you assemble the float to the sender and wiggle it into the tank.


    .The plastic sender sits on the first rubber gasket sealing it to the tank. Then the next rubber gasket goes on top of the sender sealing the bolts coming through the slots in the plastic part of the sender.
    The the final metal ring goes on top with the bolts with the sealing washers go through it
    Put one bolt through the whole stack, then remove the first bolt you were holding the metal ring up with. Then place all the bolts back through the entire stack.


    The longer bolt maybe for an earth tag maybe there is an earth connection in the plastic part that needs to touch it.

    Or its to do with some 3D fiddle that lets you assemble it more easily in the tank ..


    So even if the tank is brimmed to the top of the filler the fuel sender doesnt leak as all the holes are sealed with gaskets.

    The nasty bit is dropping parts in the tank...
     
    Last edited: Aug 3, 2019
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  3. iblaze

    iblaze Supporter

    Cheers mike
    I was thinking of maybe cutting a hole the right size out the top of the original sender and hopefully clamping the rings either side of it then simply fit it to the tank using the original fitting.....
    Whether this is feasible I don't know yet.
    I'm going tatton park tomorrow so I'm looking out for an original fuel gauge I did get one from David but it only lasted about 60 seconds then went up in smoke.
    I had a new voltage stabilizer fitted from JK but even I know just because it's new don't make it perfect.

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  4. I’d doubt it was the stabiliser. I’d put money on a short on the sender, meaning there wasn’t anything around to limit the current through the gauge. Just a guess.
     
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  5. iblaze

    iblaze Supporter

    So if I manage to find a gauge do you think I should get a new sender too?
    I'm hoping I can send the aftermarket one back.

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  6. Is your sender out, meaning can you easily waggle it? What resistance did you get between the sender lead and earth?
     
  7. iblaze

    iblaze Supporter

    No mate I've not touched it yet as I want to take the bus to tatton park tomorrow.

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  8. Have a quick measure when you get the chance.
     
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  9. iblaze

    iblaze Supporter

    Ok sender is out... no wiring connected
    So if it's in the empty position it reads 76.1
    In the full position it reads 08.3


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    Gingerbus likes this.
  10. ^^^that reads about perfect. It should be somewhere around 10-75 ohms I think if I recall correctly.
     
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