I ordered, received and installed the spares kit and the pump works. One suggestion: before disassembling mark the two halves of the cover plus the inlet and outlet nipples so you can put all of it back together in the correct orientation.
To Whale Pumps: a more detailed exploded diagram would be a gib help. The resolution of the jpg above is so low you can't read the text or see the orientation of the valves. The valve screws are the only tip off.
