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Mack CH Recall 89V178: Service Brakes, Air:Controls:Foot Control/Valve

NHTSA campaign 89V178, reported October 23, 1989, 3,652 vehicles potentially affected.

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The repair is normally free at an authorized dealer.

Official recall notice

Safety recall 89V178MACK TRUCKS, INCORPORATED
Component
SERVICE BRAKES, AIR:CONTROLS:FOOT CONTROL/VALVE
Problem
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.
Risk
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.
Notes
SYSTEM: AIR BRAKE VALVES.VEHICLE DESCRIPTION: TRUCKS

Affected vehicles

Mack CH1989