Air Dryer Purging Air Every 15 Sec

[GunRunner]

The governor that the shop put on it was an off brand governor, probably Chinese. I just went to Freightliner and bought the Bendix governor that it calls for, which is not adjustable and set at 130 psi. Still the same issue but now it is purging about every 25 seconds. I pulled the tube off the manifold and disconnected the supply line at the compressor and administered several healthy doses of 3 in 1 oil in case the unloader was stuck. I did that two separate times to no avail. The only other thing that I noticed is the part number stamped on the body of the air dryer is K093427. When I was at Freightliner, they said the schematic called for K057542. I’m going to try and call Bendix tomorrow to see what the difference is between the two and if that could cause my issue.