System Three recommended using one of those human solvents such as MEK.
I've had fair luck just heating the pump with a hot air gun. It's the same
crystallization you see in the resin, I think. Keeps the ball valves from
seating.

Roger

http://home.earthlink.net/~derbyrm
"Dave W" wrote in message
...
Has anyone found a way to prevent West pumps from failing to pump after
being stored for a while?