I have an Intermatic timer that’s no longer turning on the pool pump. I can manually turn it on and then the timer will turn it off. The trippers are fine and I can hear it running. Clock works. I’ve seen that there’s a part behind the clock that can wear down so the tripper won’t turn it on. Looks like I’ll have to replace the timer however I can’t find a part number other than what shows in the whole control box. Help.