If you have a second hand this will normally pull off.
How to remove the movement from a wall clock.
If there is a second hand on your clock you may need to use your pliers to remove a small nut and cap that holds the hand in place.
Use your fingers or a set of needle nose pliers to carefully remove each of the clock s hands one at a time from the hand shaft which is the anchor in the center of the clock that all of the hands are attached to.
This is a good diy to learn.
Thin needle nosed pliers can be used to pull upward on the back of the second hand near the hub to remove.
Clock movement replacement only require two measurements and then you can choose the correct movement and clock hands.
Support the movement with your free hand as you turn the nut.
Lift off the minute hand then the collet.
Place the leading end of the wrench jaws on the nut and turn counterclockwise to prevent scratching the dial.
On some clocks the hour hand will have a small clip or screw holding it in place which you will need to simply remove.
Remove the battery operated movement retaining nut with an adjustable wrench.
Next lift off the hour hand.