I don't think you're "really" supposed to mess with it. That said:
Start with this:
Slide the mount off exposing three screws that hold upper half to lower half:
Take out three screws and separate upper and lower:
This is the steering wheel end with retainer clip still installed:
Pull off the steering wheel taper shoes and the retainer clip:
Once you remove the retainer clip, the upper shaft comes out the bottom end of the housing. The spring will probably push it out, but it might require some gentle persuasion in addition to the spring:
Tap the bearings out of the housing if you dare. There is one at the top and one at the bottom:
Bearing disassembled:
There are thirty balls in the bearings so you can count what you have to make sure you didn't drop any: