Remove the battery operated movement retaining nut with an adjustable wrench.
How to remove the movement from a wall clock.
Support the movement with your free hand as you turn the nut.
If you have a second hand this will normally pull off.
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.
On some clocks the hour hand will have a small clip or screw holding it in place which you will need to simply remove.
Next lift off the hour hand.
To remove the clock movement you will need to remove the clock hands first.
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.
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.
Place the leading end of the wrench jaws on the nut and turn counterclockwise to prevent scratching the dial.