Hi'all, Problem with an old H20D-03, intermittent drive, start it up sometimes & it drives & operates as it should. turn it off & re start no drive & no steering & wont rev up on foot throttle/direction pedal but works fine on hyd levers, checked every thing I can think of, oil & filters 12 v feed to fwd/rev solenoids & relays (all good) it's as though hyd pressure is lost but I can go to it another time & it will start & run fine until its turned off then no go! any one got any ideas?