With snap ring removed, slide the retaining barrel off. Don't worry about marking it, the barrel will only go on one way. Notice the little nylon stick serving as a retainer. DON'T LOOSE THIS OR FORGET TO PUT IT BACK DURING REASSEMBLY.
Notice the bearing color, white/black = Delrin (lo load) greenish brown = Torlon (hi load).
Turn the assembly over,(have a towel or cloth underneath, as these parts are small & they tend to bounce away)then gently push/pull the two halves while simultaneously rotating the parts. Everything will fall out, the two parts cannot be separated until all the bearings have fallen out.