There is a circlip under the end cap, if you are lucky you can use a pin tool to work it out, if it does not budge you will need to drill a hole and use a screw to pry it out. Needless to say yo9u will need a new end cap, no biggy.
Now take your circlip tool and remove the circlip, the Omega spring should not slip off.
Just take note of the order of assembly, remember there is an o-ring and washers so make sure the items are placed back plus hi temp lube on the new one.
I found using bunch of washer and a c-clamp to press on the new Omega ring to the old pin, make sure the pin is in good shape, if not get a new pin, circlips, o-ring, maybe bearing if it is rough and end cap.
Trick on end cap, the new end cap is designed to be tapped in by a mallet so it can spread out in the housing per Marc Bixen at Redline Tech, worked like a charm, I did not realize this the first time and I lost one on the road
Live and Learn.
Heck will be in Simi tomorrow afternoon showing a house, pm me if you need a hand, can stop by and give you some pointers.
Jim