A suctionvalve of the bilge pump was completely stuck and did not close anymore.
So today we loosened the nuts and removed the complete valve.
We needed heavy equipment to remove the valvestem and getting the old gaskets out of the stuffing box.
After that we could clean it all, and assembled all the parts after that.
Finally we have put the thing back at it's place and tested it.
- Nikon D7000