I have a Delfield freezer I'm working on.Its a 404A system.When I got to the call I found a tripped breaker.I reset the breaker and it started no problem.I proceeded to take my pressures and temps.I had a suction pressure of 15psig witch is ok.After about 15-20 minutes I can hear it pull down then shut off.It stays off for about five minutes then when it goes to start compressor hums and trips breaker.I thought I had a starting issue so I mF the caps.All in normal range.So I added a hard start and same thing happened.Everytime I set the breaker it starts fine,then does the same thing again.Any information to guide me in the wright direction would help