Tractor tanks and gauges are not as refined as auto ones, so I have seen some act like that and some that are slower to swing as fuel sloshes around in the tank. The sender likely has some wear and is looser in the joints and pivot than when it was new, which could be part of the issue. You need to check the sender with an ohmmeter to know what it is really doing. And it is easiest to do that with it out of the tank. Simple description of what is inside the tank: The float arm moves a contact across a resistor coil, so the resistance between the gauge and ground changes as the arm moves from empty to full which makes the gauge arm move. A new sending unit might be steadier. Gauges and senders must match the ohm ranges so, if you decide to get one you need to get the right one for your tractor or it will not register correctly.
This post was edited by Jim.ME on 11/02/2023 at 04:08 pm.
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