I have a 4300 HST manufactured in 2000 it seems the old the tractor and I get, the harder it is to hold down the forward pedal. It is fine for quick work but if I am mowing or doing anything else for any length of time it is a real PITA (or leg). I seem to remember discussion of this year/model having a poorly designed pedal set up. Is there anything I should check or do or should I just get used to hobbling around with a sore leg?