1) T103 is 120Volt timer that can control multiple loads and different voltages..
If new timer dial stops turning after the tripper passes, then wiring from circuit breaker is probably reversed with wiring going to pump.
Open following link to identify correct wiring:
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T1032) Add a comment for specific help with wiring, and I will respond.
Give details of pump voltage, and description of each wire.
3) To fix old timer, Replace 3-watt, 120Volt WG1570 clock motor.
Open following link for illustrations showing how to replace clock motor:
http://waterheatertimer.org/How-to-troubleshoot-Intermatic-timer.html#clock4) Take a moment and rate answer:
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