It's a pretty straight forward deal. You could lay out all of the pieces you take out on a towel, in groups of parts that go together (all of the acc. pump parts for example.) and match them up with the ones from your kit. There were lots of extra springs and balls that came with my kit, for different applications.
I just took it apart, soaked it overnight in card cleaner, rinsed, dried, blew out all of the little tiny passages with my compressor, and reassembled. Make sure the mating surfaces of the air horn and bowl are straight and true, that's kind of important.
