I have confirmed the starting problem on my B3300SU (with front end loader and backhoe) is with the forward/reverse peddle safety switch (pulled the electrical plug off and tractor starts when I short the contacts). Anyone know what size wrench the nut takes and any tricks to getting at them so I can clean or replace the switch as necessary? Clearance is very limited to get a wrench in there to loosen up the nut. Fabricate a short/stubbie wrench? Any help/tips appreciated!