I just did this a couple weeks ago. I used a gear puller to compress the cap that you are looking at there, then a small screw driver to pry out the retaining clip. Once that is out, you should be able to wiggle the cap off but mine need a couple taps with a screw driver for it to pop out. On mine, there wasn't too much pressure on the cap so it didn't fly off or anything.
Here's a video that shows it well even though it's an r/65.
Hope you aren't offended by spicy language...