Timers were installed 2011 on new pool - they stopped working long ago, and did not feel wheels moving on motor so replaced both. Only wheels furthest from dial are moving on new motor (maybe that is normal?) - I did not feel them moving at first so I took one of the motors off and watched it with power - the back two wheels are moving - now when I poke finger in the polaris timer I feel same two wheels moving. When I button all up - the yellow dials do not move. I am unable to move dial without pulling out normal to set time, so seems spring is OK. If I need to replace whole mechanism I will do - just odd that both are the same - am I doing something wrong?