i just got a jd 4030 got home and hyd stoped working. ended up taking control valve out changing all the oil and filters and went to working great. after 3 days using it it did it again. where no hyd pressure at all. took control valve out again and adjusted. once again went back to working fine other than no power steering going to the left. turn right easy as can. but going left have to work at it and sometimes plum hard as can get . ive removed every line off the steering hoping to bleed and such forth but have only gotten to where its a little easier. does anyone have any ideas on something else i can try without paying jd 100 hr to work on it