Oil & Fuel New Holland TC34DA Fuel Quantity indicator problem

[mac1520]

Hello, I bought a New Holland TC34DA Compact tractor that has 440 hrs on it. It's been working great, but noticed a few weeks ago the fuel qty indicator is becoming erratic. Seems like it's electrical because the gauge will read fine one minute and then drop to zero the next. Usually takes a while for the tractor to warm up before it stays where it should be. Is there a relay/switch I can replace? Any info would be greatly appreciated.

MAC

Update: Doing some research last night found the manual describing Fuel Sending Unit that mounts on top of fuel tank. Removed instrument panel and found a screw loose that was connected to fuel sending unit. Tightened screw and good to go!