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There is a cap, you see where it is separate pieces, you can also see where your fingers can grab it on both sides. That part should lift up and twist 90 degrees so its up and out of the groove. Then Pull straight up. Sometimes they get a little stubborn, pull up and it should slide out with some persistence.
It's funny you say that because I thought it was going great!Yup if the bearings down there are seized up. Coat it with your penatrator of choice, unlock the pin on top, grab that motha with both hands, and pull hard and fast. You know this isnt going as planned as an explanation. You gotta get enough force to pop those locked up bearing free.