To remove (a liquid) by a steady, gradual process
Without a pump or two spares, they accomplished the same thing.
The general scheme of Geisler's pump is shown in fig.
If the air is just let out of your tires, do you think a bicycle pump might be enough to get you running?
In the old days there was a hand pump in the kitchen and no hot water you didn't boil yourself.
He took the opportunity to casually pump Hunter on the Byrne disappearance.