At the end of the maple season, the Atlas Copco dry claw pumps can be cleaned with some warm water. We turn the pump on low speed and flush it with a half-gallon of warm water. We follow-up with another half-gallon of warm water to rinse it.

Warm water wash.
https://youtu.be/JB0bGP9eGqU

Warm water rinse.
https://youtu.be/qebf8heT8j0