Ralp, Grusse aus Kanada,
I used DHL Danzas to ship a crate of motorcycle parts to Germany, port of entry was Hamburg. The crate was about the volume size of a pump but different dimensions.
It was I think 375 US or near that(2 years ago). If it was larger, like say 2 pump size I dont think it would have cost more as there are minimums for weight and volume. If you need some small stuff sent as well that would be a good time. Gut the heavy parts of the pump (motor, pump mech etc). Might not hurt to tape the glass in case it breaks, easier to clean up. Bolt the pump base to the crate and shim and bolt the top to the crate if possible so that it does not move around.
Good luck with your pump, what kind are you getting???