Ok - had time today to disassemble valve. Inside the 3 point control valve the lever has a shift fork that shifts the hydro spool in and out to direct hydro fluid to control up are down on the 3 point. The bolt that secures the fork to the lever was snaped. By over exstinding the 3 point in the up position the leverage snaped the bolt. Looking at several other vaves on various makes of tractors this can be a option to trouble shoot 3 point failure. Replaced the bolt reassembeled and put the little tractor to the plow. NOTE - the Kubotas with manual trannys will allow water to leak into the tranny through the shift boot if cracked are lose (there was 1 1/2 qts of water in this one).