AD-9 Air Dryer Purge Valve with Heater (Replaces for Bendix 800405 & 5004341
This is an Air Dryer Purge Valve This is the common problem with the Air Dryer.
Just unbolt the old purge valve and replace with this new purge valve.
Just bolt the three bolts in and replace the filter/cartridge on top dont spend $200 on a reman air dryer when you can do this yourself. This will save you money.
Take advantage of a good thing here.

Note:
please make sure it will fit your machine before purchasing it.
Please check pictures for more details.