Hi, I recently purchased a MTD 995. It has the 18HP Briggs, three point, hyd lift, etc. Came with mower deck and snowthrower. At time of purchase, no accessories were attached, so when trying out the hyd lift, it seemed to work fine. Big surprise after getting the rig home and correctly attaching the mower deck. The deck lifts very very slowly. I changed hyd oil and filter which looked quite clean to begin with, but changed them anyway. Owners manual describes my problem and a fix, so my hopes were high. I removed acorn nut on the lift valve, backed off the lock nut, and turned the set screw in. Tried the set screw in all positions but no improvement. Is there something else I can do? I really hate to think the hydro pump is bad, it's the same pump for the drive as it is for the lift, and the drive works great!