United States 84V035000
Mack Trucks, Inc.
The problem
A MANUFACTURING ERROR RESULTED IN THE INSTALLATION OF CARBON STEEL SPRINGS IN SOME DUAL-COMPARTMENT AIR RESERVOIR CHECK VALVES. CARBON STEEL SPRINGS ARE INADEQUATE FOR THIS APPLICATION BECAUSE THEY ARE SUBJECT TO SEVERE CORROSION AND SUBSEQUENT FAILURE OF THE CHECK VALVE.
What owners should do
THE CARBON STEEL SPRING WILL BE REPLACED WITH A STAINLESS STEEL ONE.
Units 850