Lee,
I'll email you the breakdown. The pump is probably actually a 3Z180, made for Speedaire by Champion. If you are looking for the assembly sticking out of the back of the pump, it is probably the centrifugal unloader, which vents the pressure after the compressor shuts down. You can get the parts from Grainger parts (888-361-8649), or your local Champion compressor distributor.
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