All:
we should kick around a list of items one should check each time before using their equipment (tractors & mowers). I had wheel bolts coming out during loader work, another poster lost his oil plug mowing. let's make a list of things to check "while your tractor is warming up", however let's not make it too long or no one will do it. Below is a start:

1) tires
2) tire rim bolts
3) oil plugs
4) hydro connections