Allegro Club International

[Dave Coates]

After painting the NOS fuel tank, I took the float out to check it as the guage never went north of "E". I put a multimeter across it and it showed open curcuit. I opened the (variable resistor/potentiometer??) up and it became obvious that the wound wire wasnt..........It looks similar to every other little-metal-box-on-a-petrol-float from cars of that ilk.....Has any one ever adapted sender units from other cars? If not complete units then how about just the resistor part?
_________________
A good bolt is better than a bad weld....

[Laurence]

Perhaps the new paint on the tank is (now that it has been painted) preventing the body of the tank from making a good earth connection to the body of the Allegro.

Also the new paint on/around the sender locking-ring could be preventing the sender from making a good earth connection to the tank body.
When the sender is fitted to the tank, & then the locking-ring is fitted, both the sender & the tank in the locking-ring area should make a good electrical connection (earth) otherwise the gauge will never work even with a new sender unit.

Clear the paint from areas around the tank securing bolts & the sender locking-ring & once it's all in place & tested/working, then paint these areas if required.

Earlpart www.earlpart.co.uk 01773 719504 or The Electrical Parts Company Ltd 01584 811118 may be able to supply a new sender.

[Dave Coates]

no, sorry, what i meant was, The old tank leaked at the seam. So as i had to remove the tank to do the welding under neath and to fit the new tank anyway, I checked the float on the bench, connecting the ohm meter straight to it. When it registered open curcuit, thats when I opened it up and found the corrosion......
_________________
A good bolt is better than a bad weld....

[M. Irvine]

Dave,

The sender part number is, I believe, ADU3220.

If Colin Taylor, our spares genius, cannot help, if you do a Google search with this part number. It does come up with more than one supplier, but the first one I tried says it is £65!

I don't believe you will buy the resistor separately, and if you 'rewind' it you would need wire with the correct resistance value.

I hope this helps.

Merv.
_________________
ALLEGRO = Agile, Lively, Legendary, Economical, Genial, Reliable & Outstanding.

[Mike Dean]

Or only 35 Euros from www.classic-car-parts.nl.
Mike.

[Dave Coates]

I was thinking something similar to this:
http://cgi.ebay.co.uk/Fuel-tank-sender-MGB-1965-1974-Seal-and-lock-ring-/330354149008?cmd=ViewItem&pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item4ceaa44690
It looks very similar, almost llike it could be bent into the right shape. Failing that, take off the resistor and fit it to the allegro float. I mean, generally they`re all Smiths and all stabilized to 10v.....So, in theory...................
_________________
A good bolt is better than a bad weld....