The Ford Barn

WQ59B · 06-06-2017, 09:56 PM

Have an all stock '40 COE 239. Still 6V, all original gauges. This truck has been an amazingly willing resurrection candidate- most components when opened/disassembled have been extremely clean & operable.

Changed out the original gauge cluster with a much nicer one bought at Hershey, but apparently burned the delicate wire inside the gauge when had problems last year blowing fuses. Today I put the original gauge back in after verifying the internals were electrically OK. Also taped the edges of the rear gauge cover to insure no grounding out or other electrical issues.

Original sender is clean & working, brass float is air-tight.

However, when running today the fuel gauge wavered quite a bit between the bottom mark on it's scale (empty) and a quarter tank... tho looking into the top of the tank I had 33-40% of a tankful (via the drilled internal center baffle). Ran truck for about 4 minutes and gauge didn't settle down, kept wavering inconsistently. Tank sender is grounded to cab.

I know about the adjustment 'gears' inside the gauge but MAN is it a PITA to get to the gauge back in a COE! Is there any other suggestions or causes of an unsteady reading??

Oh, and I could live with a 'gauge stick' if the COE didn't have a 45-deg bend in it's filler neck. :/

06-06-2017, 09:56 PM	#1
WQ59B Member Join Date: May 2014 Location: NJ Posts: 69	'40 Fuel gauge Have an all stock '40 COE 239. Still 6V, all original gauges. This truck has been an amazingly willing resurrection candidate- most components when opened/disassembled have been extremely clean & operable. Changed out the original gauge cluster with a much nicer one bought at Hershey, but apparently burned the delicate wire inside the gauge when had problems last year blowing fuses. Today I put the original gauge back in after verifying the internals were electrically OK. Also taped the edges of the rear gauge cover to insure no grounding out or other electrical issues. Original sender is clean & working, brass float is air-tight. However, when running today the fuel gauge wavered quite a bit between the bottom mark on it's scale (empty) and a quarter tank... tho looking into the top of the tank I had 33-40% of a tankful (via the drilled internal center baffle). Ran truck for about 4 minutes and gauge didn't settle down, kept wavering inconsistently. Tank sender is grounded to cab. I know about the adjustment 'gears' inside the gauge but MAN is it a PITA to get to the gauge back in a COE! Is there any other suggestions or causes of an unsteady reading?? Oh, and I could live with a 'gauge stick' if the COE didn't have a 45-deg bend in it's filler neck. :/