Yes there is. Please no pressure.
Tap all around the round cap with the wooden hammer handle.
I use a 14" pair of Channelocks with the round jaws. With them when I turn I don't squeeze the cap, I turn the cap. It's easy to squeeze too much.
Put some grease on the threads inside that cap when you put it back together.
After you put the cap back on, adjust the tension on the ball with the plastic bushing.