I remember reading an article explaining the inner workings of the gear, and that the motor does infact tend to pump every 15 or 20 minutes for a bit to keep the hydraulic pressure and to only pop the breaker if it pumps for an excessive amount of time...(due to probability of the fluid leaking if it is pumping for an extended period of time.)
Seems pointless to pop the breaker if there seems to be no issue with the fluid pressure.
Pyro