Junkman
Super Member
Under ideal operating conditions, how often should the air in the tires be changed? What type of air should be used? What is the correct moisture content? Oxygen content? Should it be filtered? Should the valve stem be at the 12 o'clock position or 3 o'clock position when filling or at some other position? What is the correct procedure for draining the old air? Please help me with this perplexing issue........