Liberally grease whatever the manual says to grease. Check belts for tightness and fraying. Specific components of grit recycling systems require special attention. It may be an induction vacuum run off an air compressor or a diesel-driven positive displacement blower. Likewise, the devices that blow air on dust collector filters to clean them require dry air, lest the dust moisten and turn clumpy.
Desiccant dryers have a drain at the bottom that lets water escape.
Keep it cracked open and daily check to see that the drain is not stopped up with desiccant material. A stopped-up drain will trap moisture in the dryer and reintroduce it into the air stream, said Shannon. Check the drain valve on the accompanying water separator as well. Don't let cooling fins on after-coolers get plugged up with debris. Clean them out with high-pressure air or water.