air pressure problem need help, 2004 volvo vnl 780

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#11

12-01-2012, 10:41 AM

GMAN

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Join Date: Feb 2005

Location: Tennessee

Posts: 17,097

Quote:

Originally Posted by mgfg

I'm starting to see some truck built with the governor attached to the air dryer as crazy as that sounds.

I don't think that I have ever owned a truck that the air governor wasn't around the air compressor. That is odd to have it next to the air dryer.

#12

06-12-2014, 06:55 AM

Vdizdar88

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Join Date: Jun 2014

Posts: 1

I have a 2009 Volvo VNL 630 with an ISX Cummings engine.

I have a problem losing air, I can only build up air when I am pressing the gas over 14000-15000 RPM or when I am driving. I lose air mostly when I am dropping the trailer or when I use the air brake.

I changed the air governor and it didn't fix the problem.

Does anybody know what it could be?