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GORDON HUMMEL · 10-09-2011, 10:57 PM

There is a D2 valve or similiar on most air systems that shuts off the engine compressor at +/- 120 PSI. This device also activates the air dryer in many applications.

They are +/- $15.00 & on my Newell located by the air dryer.

Any truck shop will have them, & it's the first thing to replace given your indicated pressure

10-09-2011, 10:57 PM	#4
GORDON HUMMEL Senior Member Join Date: Mar 2008 Location: Forest Ranch, Ca for the summer Posts: 299	There is a D2 valve or similiar on most air systems that shuts off the engine compressor at +/- 120 PSI. This device also activates the air dryer in many applications. They are +/- $15.00 & on my Newell located by the air dryer. Any truck shop will have them, & it's the first thing to replace given your indicated pressure __________________ Gordon Hummel 1991 41.5' #266 8v92 2009 Pontiac Vibe GT Toad Fulltime on the road