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Suprman, do you think that I need to buy that kit DQ6020, or just spray/lubricate the existing expello valve and call it a victory? If I was to lubricate it, should I just spray WD-40 from the bottom?

Suprman, it was exactly as you said. I came to work today, pushed the valve up with a plastic stick, with a bit of effort it "clicked" and went up a little. Now the air pumps up. In fact, this Holset compressor is amazing in how much air it pumps and how quickly the tanks fill. This...

Doghead, thanks. I was looking in the wrong TM. Sorry. I found the right one searching for your quote. I did start following the procedure. I disconnected the governor line. Then I felt the output air line. It was not exactly hot, but it was warm, on a cool day. I simply followed the "warm"...

I have an M931A2 semi tractor. It starts and drives (used to). However, today, it started fine but would not build pressure. There was air in the tanks. Maybe 80 PSI. The pressure was below 90 PSI but it would not start pumping. I purposely bled all air out down to 10 PSI, and it still would...