Between Omaha and Des Moines, 7 miles South of I80 | hillfarmer - 1/9/2016 15:15 If the relief is not popping, I'd take the air line from the compressor off, and put a couple oz ,of air line antifreeze in the line feel under the air dryer for a leak ! Yep, maybe the purge valve is stuck (letting air escape), and you might need to push it upward.
 (purge valve, bottom view.jpg)
 (air dryer 2.jpg)
 (air dryer.png)
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 purge valve, bottom view.jpg (80KB - 262 downloads)
air dryer 2.jpg (9KB - 204 downloads)
air dryer.png (19KB - 270 downloads)
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C-15 cat, not building air pressure
