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NHTSA Campaign 89V178000

SERVICE BRAKES, AIR:CONTROLS:FOOT CONTROL/VALVE

Issued by MACK TRUCKS, INCORPORATED · Reported Oct 23, 1989 · 3,652 vehicles affected

What's wrong

INTERNAL COMPONENTS OF THE E-12 DUAL CIRCUIT AIR BRAKE VALVES MAY BE MISASSEMBLED SO THAT ONE OF THE TAPERED SNAP RINGS IS UPSIDE DOWN.

Consequence

THE SNAP RING CAN COME OUT CAUSING THE VALVE TOMALFUNCTION AND APPLY THE TRUCK'S BRAKE SYSTEM WITHOUT WARNING; THIS COULDRESULT IN LOSS OF CONTROL AND A CRASH.

Remedy

REPLACE MISASSEMBLED VALVES.

Vehicles affected by this recall

Make Model Year Units
MACK CH 1989 3,652

Source: NHTSA Campaign 89V178000 on nhtsa.gov. To check the current repair status for a specific vehicle, use our free VIN decoder.