With time the gears in an Intermatic T104 timer mechanism may become loose and start to jam causing the yellow wheel to stop turning. To correct this problem you have to replace this T104 Mechanism. The following steps show you how to replace the T104 Mechanism. Note, this guide is for a T104 220V timer. If you have a T101 110V timer, use the T101 Mechanism.
The Intermatic T104M mechanism should now be successfully installed. Close the timer door and continue to enjoy the energy savings of using a timer.