Don't operate the types mentioned but certainly a good question to think about I'd say. IMO it would fall under the authority of the commander acting in the interests of the safety of those on board, if you felt the pump may be running dry and there is no way of proving that it's not then, under the circumstances described at least, pulling the CB would seem a better bet to me than sitting and hoping it goes off of it's own accord or that it just won't overheat. I recall reading somewhere (perhaps QRH?) that a flight crew reset of CBs should only be undertaken where a checklist directs you unless it is felt it poses a significant risk to flight safety. My 2c at least.