Service Procedures: Notes
The two critical points of system are the ventilator valve and ventilating breather. It is important that these elements and all other elements are in proper working order at all times. Ventilator valve must be changed every 12, 000 miles or 12 months (1968-70), or every 24, 000 miles or 24 months (1971-74), whichever occurs first. Ventilation breather should be cleaned every 4 months or 6, 000 miles. Other components of system should be inspected, cleaned and/or replaced as necessary every 12, 000 miles or 12 months (1969-70), or every 24, 000 miles or 24 months (1971-74).