on the pump for the right side not the motor there is a square plate with four allen screws on the corners and one in the center with a nut around it. the one in the center is your hydro adjuster. you also have adjusters on the linkage
i have an lx865. i was leaking hydro oil into the gear case where the pumps bolt on. I removed both pumps and replaced the shaft seal on both of them. I did not have to take the pumps apart as only a retaining ring held the shafts in place. so it was quite easy to pull the shaft out and put new...