We have an old Ford 3910H tractor, which we use solely for motorbike events, so probably only does 100 hours a year. Towards the end of last year the usual people who use the tractor were away, and a member of the bike club used the tractor to set the track up. Now for some unknown reason it was left idling for upto 48hours!! It still runs fine but we have a warning light on the dash, we originally thought this was oil pressure, so did an oil & filter change along with the oil pressure switch, which has made no difference. I have attached an image of the light that's on if anyone has any ideas it would be greatly appreciated.