How do I adjust the tension on a spring hanger?

The tension on a spring hanger is adjusted by turning the load column.Increasing the load seen at the spring would be accomplished by tightening(turning clockwise) the load column at the connecting rod. Conversely,loosening (turning counter clockwise) the load column would cause the springload to decrease.

Variable Spring and Cro-Moly 3-bolt Clamp Assemblies for a Power Generation Facility
Variable Spring and Clamp