pieceseeker wrote:Are they're any drawings or pics of these ball valves...an exploded view?
None that I have seen. That part the nipple screws into is not a 'user servicable part'.
You really do not want to probe around to remove 'sawdust'. It is very difficult to 'get in there' and more so to get it back togethder again(and functioning).
Try blowing it out. There is an inlet port near the bottom of that tube it is mounted on.
There are two valves(intake and exhaust(nipple). Crud tends to collect in the 'common' chamber. Manually operating the piston(with the leather 'ring') can 'help'. I think you will have to 'blow' from both directions.
Again, disassembly not recommended.(but possible)