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Mack MH Recall 84V035: Service Brakes, Air:Supply:Check Valve

NHTSA campaign 84V035, reported March 23, 1984, 850 vehicles potentially affected.

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The repair is normally free at an authorized dealer.

Official recall notice

Safety recall 84V035MACK TRUCKS, INCORPORATED
Component
SERVICE BRAKES, AIR:SUPPLY:CHECK VALVE
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.
Risk
Remedy
THE CARBON STEEL SPRING WILL BE REPLACED WITH A STAINLESS STEEL ONE.
Notes
VEHICLE DESCRIPTION: HEAVY TRUCKS.SYSTEM: SERVICE BRAKES; DUAL COMPARTMENT AIR RESERVOIR CHECK VALVE.CONSEQUENCES OF DEFECT: IF THIS CHECK VALVE FAILURE WERE COMBINED WITH ASEVERED LINE IN THE PRIMARY AIR SYSTEM, COMPLETE LOSS OF BRAKES AND POSSIBLEVEHICLE CRASH COULD OCCUR.

Affected vehicles

Mack MH19821983