I found mine to have a bad contactor in the key switch~ Glow plugs were fine, just not getting the current they needed. I will be adding relay for glow plugs and starter so all the current is not going thru the key switch!
I am having electrical issue and cannot seem to find WSM? I used a Kubota WSM site and they charged me for a parts manual! No reply guess I am screwed on that one. . . Where did you get your WSM please?