The clock motor in an Intermatic T104 Timer will occasionally fail. If the yellow wheel stops turning but the manual switch still functions correctly, It may be due to one of two failures, the timer motor or the timer mechanism. The following steps show you how to replace the motor, WG1573-10D. Note, this motor is for a T104 220V timer. If you have a 110V timer, T101, use motor WG1570-10D.
The Intermatic WG1573-10D clock motor should now be successfully installed if the yellow clock dial is turning. Close the timer door and continue to enjoy the energy savings of using a timer.