Replaced timer unit... It was EASY!
Part was exact replacement unit. Just remove the old one and put in the new.
There are no instructions with the timer unit. But, it is very easy:
1. Remove center cover from timer control knob
2. Remove C-clip that holds knob to shaft
3. Remove knob and spring
4. Remove two screws at top of control panel
5. Tip control panel forward
6. Unplug the two control cables from the timer
7. Remove the old timer
8. Mount the new timer
9. Plug in the control cables
10. Reassemble & test
Success!