I have a 3240 with 800 hours, bucket and 6' mower. Lately I have noticed that if the weather gets into the mid eighties, after a half hour or so of mowing (hilly), the temp gauge goes up one notch over normal. All the fluids are fine and the radiator is clean. So, is this natural for an older machine...should I shut down the minute the gauge goes up or is it safe to continue mowing? Normally the mowing takes about an hour, but like I say, the gauge goes up after a half hour. I am not sure where to look for problems that could be causing this....BTW, I have been a member for years but forgot my password. There was no way they were going to accept my application for confirmation....so, I guess I'm a new member again