Application is 1979 D150 truck if that makes a difference.

I want to take apart the pivot assembly so I can grease it. Can't quite see how it comes apart
and don't want to force anything. It looks like the crank arm is swedged onto the shaft.
So if this is correct, then it must have been assembled by pressing the little serrated cap piece onto the other end
of the shaft, once the shaft was inserted into the cast housing.

So how do I remove the cap off of the shaft ?