I can't see clearly from the diagrams in the SB, but I think that if you have the actuator rod able to rotate on the duplex bearing then setting the correct torque on the castellated nuts is going to be difficult during assembly or maintenance.
Is there a method to do this or is it a matter of getting the nut to a position where the split pin can be fitted. That does not guarantee the final position of the nut, so any torque value would be at best vague.