How often should I change my air dryer filter?

Clean the back condenser of the equipment more than once a week with dry compressed air or copper;

Check the automatic drain valve for any blockages every month, and clean it if necessary;

Every three months, check whether the fan blades of the cooling fan have any bad vibration.

Check and tighten all screws, bolts and various fixtures annually;

Check, clean and tighten all electrical connections annually.