Decided they both need a complete overhaul. I've ordered a pressure gauge to test the pumps--should be here Monday. I stripped the larger down about as far as it goes. I drained and flushed the tank--just a little junk in there. I Cleaned the fuel intake filter--removed a bit of stuff. I took apart the nozzle--it looked perfect but I cleaned with carb cleaner and a q-tip. I took the compressor apart and I'm going to clean the rotor, vanes and housing tomorrow as well as the air filters. It's possible the ball that regulates pressure was stuck--it didn't fall out on it's own when the set screw and spring were removed--took a good tap to get it to drop out. If if was stuck that might cause high air pressure. After this I'll check the pressure Monday when I get the gauge and I can also check motor speed with an optical tach I recently got. Hopefully with all that done it will work.
QUESTION, Is my assumption that the compressor pump does not require lubrication correct? A Youtube video said use graphite but I think that'll just add graphite dust into the compressed air which will have to be filtered out by one of those filters. I haven't found any manuals or manufacturer instructions they say to lube it in any way.
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