Tip:
After you gently pull up the end
of the arm cuff lock by 90°, you
can adjust the height of the arm
cuff. After you finish the
adjustment, pull down the end
of the arm cuff lock to lock the
arm cuff.
To remove the control box from
the upper stem, counterclockwise
turn the bolt that holds the control
box to remove the bolt. Then
move the control box upwards to
remove it from the upper stem.