Good news! Problem found and solved... hyd line at quick disconnect came lose. Reconnected, and curl works fine. Happy days! Forks and backing plate still gonna give me a few hours in the shop, but it all pays the same. Nice that I work for him most days... he brakes something on log days and I get paid to fix it.
Seat time... after the line fix on the L4310, I got to drive the L2850 about 4 miles around the ridge from his house to where we work, nice sunny day for a cruise... when I got home from work I took my own tractor over the hill to cut up a fallen tree. Got an 8' and 12'x 12"+ logs out of it, as well as a nice loader bucket of firewood, with at least another left in the field.
Good day, good day indeed... spring time is here!