auxiliary pump
donkey pump

Once the primary feedwater pump system failed, three auxiliary pumps activated automatically.

Only two assistant engineers, attempting to repair an auxiliary pump, were still awake.

An auxiliary pump had been rigged in the engine room, mounted on a plank of wood slung between the main engines.

"I've ordered my crew to set up auxiliary pumps and hoses to help stem the flood."

"Chief House says he's going on auxiliary pumps in an attempt to stay ahead of the flow."

Pointing a finger like a pistol at the cardiologist, he demanded, "What about the auxiliary pump?"

The crash started her rockets exploding and knocked out the fire main and auxiliary pumps.

It had also shown the auxiliary pumps already on, even though no additional water was getting to the reactor.

Once the secondary feedwater pumps stopped, three auxiliary pumps activated automatically.

Soon auxiliary pumps stalemated the advance of the water gushing into the lower decks.