It used to run at about 175 pounds for years. I expect the valves and rings are worn. But I cannot seem to find any information on this manufacturer or anything source for parts either.

This was not a fly by night company and I’m surprised that there is virtually no information available on these. What ever happened to the Wayne Pump Company of Wayne Indiana ? ? ?”

Well, we did some research, and this may be part of the story, Ron:

“On June 11, 1943, the assets of Equipment Corporation were acquired by the Wayne Pump Company and moved to Fort Wayne, Indiana. Six years later [this would be about 1949], following the purchase of the company by C.J. Symington [ Charles Julian Symington (born 1883)], the Wayne Pump Company merged with the Martin & Schwartz Company from Salisbury, Maryland. Symington combined the field working group and the senior management group of Martin & Schwartz with the Wayne Pump Company name and location. In 1951, poor labor conditions and a strike in Fort Wayne forced Symington to move the Hose Reel Division and the Gasoline Pump Division back to Salisbury, Maryland, leaving the Air Compressor Division as the only product line left in Fort Wayne, Indiana.

During the late 50’s, the Wayne Pump Company name was changed to Symington – Wayne to include the Symington – Gould Company in Depew, New York. In the next ten years the Symington – Wayne Company would experience more changes than just its name. The following decade saw controlling interest change to Dresser Industries.”

[...]

Then, Who is Wayne-Vaughn Equipment?

Now, to complicate that a bit, this site has a post from another visitor about Wayne air compressors. It says “Wayne-Vaughn Equipment Company in Fort Wayne, Indiana sent me a PDF manual for mine (a Wayne air compressor), which is a model #5163HG. They only have the complete valve assemblies in stock. No other parts available. In the picture of the tag, the top number is the model# and the bottom number is the serial#. Number for Wayne-Vaughn parts is 877-655-6804 X-202. I talked to Tom and he was most helpful and quite patient. He told me about the history of my particular model (last made in 1950). Hope this helps. Good Luck