Looking for some help here. Just got a Massey 255 can't figure out the 3pt hitch lever operation. The plastic covered lever closest to the seat will raise and lower the hitch with no load on it. But the outer lever with the ball on top has to be used and put into what I believe is constant pump mode (all the way up past the lock) in order to pick up anything heavy. Is this correct? Also does it matter which hole the center link is mounted ( top, bottom or middle)? Thanks.