I have a 95 w900 with a N14 that I have been chasing constant air issues with, originally the truck would stop building air at random points until it sat for 10-20 minutes and would work again. I replaced the Air Compressor itself, AD-9 dryer, D2 Governor, and all the lines to and from dryer to governor and tank to dryer with new. That has fixed the issue of not building air but I am now getting a consistent purge every 10-15 seconds at idle and increased with higher RPM's. I've traced the lines that were replaced to make sure they were not crossed in any way and found them to be correct and put a new purge valve in the new dryer on the off chance it was faulty, no fix, The governor's exhaust port has a slight leak coming out, so I tried TWO more D2 Governor's and still have air seeping from exhaust port, . Truck builds air great, and purges like it should, just too frequently. I have sprayed all lines and have found no leaks or hear any leaks besides the one coming from the Governors exhaust port. ( gauges stay at 125 for hours and passes all the air brake tests).
N14 Purging air every 15 seconds.
Discussion in 'Kenworth Forum' started by 1995w900, Apr 24, 2025.
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