I know this is an old thread but after searching seems to best fit my issue. Hopefully someone can give a bit of advise. After washing I can not get my l5030HST to start. The dash is showing "HST NUETRAL" in the display. The safety switch(or relay) for the HST on the left by the damper rod. The little rubber boot for the switch(relay) plunger is torn. Neither adjustment nor electrical contact cleaner with a lot of back-and-forth has helped. The safety switch(relay) connection has four contact points in a "x" or box pattern. Question: which of these four contacts do I short to start the tractor and verify the problem point? Thanks!
When I was trying to find the solution to my no start problem the only help I got from my Kubota dealer was a parts print out from the manual. Perhaps your dealer could give you a print out for your machine, and possibly a wiring diagram for the pertinent circuits.
Good luck, Art