Intermatic T101R Tripper Issues

Hello,
I just recently had a Intermatic T101R tripping my heater and my Pentair 1.5 hp pool pump. At first it worked fine but now it trips my 20 amp breaker just when the "On" tripper is about to flip the switch on the pump and heater. If I go down and trip the breaker on its fine. Runs all day and if I manually cycle the pump on and off in the timer it never trips a breaker. Is it possible that the tripper pin is at fault? It seems like the clock is moving so slow that the contacts aren't flipping over to make a solid contact and "welding" until the breaker trips.

Any thoughts would be appreciated.