Unscrew the knob counterclockwise and then remove the dial indicator. You will find 2 5/16ths hexhead screws. Remove them.
Remove the 2 phillips screws from each side of the control panel and swing it up. Unplug the timer. I like to plug the timer in and connect the hexheads to it then put the knobs back and give er a little test before putting them phillips screws back. Here is a picture of what the panel looks like when flipped up.