Taking the compressor apart, I found a broken reed in the valve plate. Not sure if that's all the damage. A replacement plate is $80, but I would rather start with a new pump for $287. There may be more damage that I can easily see.
A day without laughter is a day wasted- Charlie Chaplin When wrestling a grizzly bear, you have to keep at it until the bear gets tired, not when you get tired. 1948 Chevy 2-Ton