Oliver electrical

deputy dog

New User
Have a 550 Oliver tractor with a converted one wire alt. Everything works but the gas gage and the charging gage. Any advise on how to fix it.
 
The Oliver was originally 12v positive ground (according to Tractor Data). If so, it would have been
switched to negative ground when the alternator was added.

The amp meter not working...

If it works backward, just switch the wires on the back of the amp meter.

If it doesn't move, possibly it was not properly wired when the alternator was added. This is a simple
diagram of how it's wired.
http://ww2.justanswer.com/uploads/indytech/2012-03-25_215414_ammeterwiring.jpg

If it's wired properly and doesn't move, or the needle doesn't return to center when the load is removed,
the gauge is bad.

The fuel gauge...

http://ww2.justanswer.com/uploads/thepuddleduck/2009-12-28_083054_fuel_gauge_sender_wire_diagram.jpg

Some fuel gauges are polarity sensitive. The way to test it is to remove the gauge wire from the sending
unit on the tank. With the ignition on, the gauge should now read empty. Next, connect the wire to a known
good ground. The gauge should read full. If it passes this test, the sending unit in the tank is bad. (Be
sure the tank is grounded, some are rubber mounted and require a ground wire.)

If the gauge fails this test, either the gauge is defective, it's not wired correctly, or it is polarity
sensitive.

Replacing the gauge with a negative ground gauge can be tricky. The gauge must be matched to the sending
unit with the proper resistance to work properly.
 
If it had a generator,yes,it's positive ground. Those cluster gauges on those won't work with negative ground. You can buy new ones that will.
 

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