Owner's manual

Series 322 Load Unit Maintenance

G. Using the offset wrench, loosen (but do not remove) the self-locking

nut.

Mechanical Null Adjustor Pin

H. Turn the adjustor pin until the scribe mark on the adjustor pin is

pointing toward the base of the servovalve.

I. Tighten the self-locking nut until 1.13 to 1.36 N·m (10 to 12 lb-in) of

torque is needed to turn the adjustor pin, ensuring that the scribe mark

remains pointing toward the base of the servovalve.

J. Remove the torque wrench and offset wrench.

4. Finish the procedure.

A. Ensure that the actuator is warmed up. If not, go to Step 1.

B. Remove hydraulic and electric power from the system.

C. Reconnect the servovalve cable.

D. Reapply hydraulic and electric power to the system.

E. See your controller manual to complete the valve balance procedure.