Detroit Series 60 air compressor having trouble building air when parked. Smart solution

Freightliner Century 2008-2009 with a Series 60, having issues building air. Air compressor is only 3 years old, no signs of oil being pushed through the system. Air dryer and air governor were also in good condition. This video will help you replace the unloader kit first instead of replacing the entire air compressor.
semi truck air governor replacement