Cub Cadet Z-Force S Series - Manual (Page 79)

Steering
73
11. Remove the hex screw that holds the steering gear
to the shaft using a 9/16” wrench. See Figure 6.82.
12. Slide the steering gear off of the shaft.
NOTE: The shaft has a double-D. It may be necessary to
drive it off with a hammer.
Figure 6.82
Steering gear shaft
Steering gear
Hex screw