Smart Positioner
YT-3700 / 3750
Product Manual
Ver. 1.03
24
5. Insert the connection bar between the feedback lever and lever spring. The connection bar must
be located upward from the lever spring as shown below left figure. If it is located downward from
the lever spring as shown below right figure, the connection bar or the lever spring will be worn
out quickly because of excessive strong tension.
Fig. 3-5: Proper way to insert connection bar between feedback lever and lever spring
6. Check if feedback lever is vertical to the valve stem at 50% of the valve stroke. If it is not
vertical, adjust the bracket or the connection bar to make vertical. Improper installation may
cause poor linearity.
Fig. 3-6: Feedback lever and valve stem
