NHTSA Recall 78V210000 — Mack Service Brakes, Air › Antilock › Interconnecting Assembly(wiring)

What's wrong

DELAYS OF UP TO ABOUT 2 SECONDS MAY EXIST IN THE BRAKE APPLICATION TIMES TO THE BRAKES ON THE BOGIE AXLES IN THE PRESENCE OF CERTAIN TYPES OF WHEEL SPEED SENSOR SIGNAL DISCONTINUITIES OR DISTORTIONS THAT MAY OCCUR AS A RESULT OF SENSOR WIRE FAILURE. THIS CONSTITUTES A NON-COMPLIANCE TO FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 121, "AIR BRAKE SYSTEMS".

The fix

DEALER WILL INSTALL NEW WHEEL SPEED SENSORS THAT INCORPORATE IMPROVED WIRING AND THE PRESENT BOGIE ANTI-WHEEL LOCK SYSTEM WILL BE CHANGED TO AN AXLE-TO-AXLE SYSTEM FOR IMPROVED RELIABILITY.

VEHICLE DESCRIPTION: HEAVY TRUCKS.SYSTEM: SERVICE BRAKES; ELECTRICAL WIRING AND CONNECTORS.CONSEQUENCES OF DEFECT: THIS DELAY IN EFFECTIVE BRAKING ACTION COULD LEAD TO ANACCIDENT UNDER CERTAIN TRAFFIC CONDITIONS.

NHTSA campaign

78V210000

Filed by

Mack Trucks, Incorporated

Report received

3 Oct 1978

Owners notified

7 Nov 1978

Potentially affected

19,370

Vehicles covered by this recall

Whether a particular car is affected and still unrepaired depends on its VIN — a model year being listed does not mean every car of that year is included. Check any VIN free on CarLogs, or at nhtsa.gov/recalls.

1977 Mack Dm 1978 Mack Dm 1977 Mack Dmm 1978 Mack Dmm 1977 Mack F 1978 Mack F 1977 Mack Mb 1978 Mack Mb 1977 Mack R 1978 Mack R 1977 Mack Rd 1978 Mack Rd 1977 Mack Rl 1978 Mack Rl 1977 Mack Rm 1978 Mack Rm 1977 Mack Rs 1978 Mack Rs 1977 Mack Rwl 1978 Mack Rwl 1977 Mack Rws 1978 Mack Rws 1977 Mack U 1978 Mack U 1977 Mack Wl 1978 Mack Wl 1977 Mack Ws 1978 Mack Ws

Is this car's recall fixed?

Recall repairs are free at any franchised dealer, for the life of the vehicle. A CarLogs report shows the recall status for a specific VIN as reported by the manufacturer — whether it's open or repaired, and whether the fix is available yet.

Source: NHTSA Office of Defects Investigation recall database. Look up another campaign →