Just bought a new Pool pump it is running 220 breakers is a 2 pole breaker after the pump runs a few hours of a few minutes the breaker pops The old pump als ran 220 and I never had a problem with it popping the breaker I do have a electric timer that the times is not workng so it really is just a switch right now Can anyone help me please No wiring was changed at all

after the pump runs a few hours of a few minutes
Explain please.

What size and what is the amperage of the new and old pumps? What size is the breakers.

Try to answer Harolds questions and also confirm 220 or 240.