Steering: linkagesRecall 78V-028 · 1973–1977 Mack HMM6856s

MACK TRUCKS, INCORPORATED recall 78V-028 covers 100 1973–1977 Mack HMM6856s for a steering: linkages problem, reported to NHTSA on February 9, 1978.

Vehicles repairedNo manufacturer report yet

Vehicles affected1001 model

ReportedFeb 9, 1978Owners notified Aug 14, 1978

Complaints since0Same system, after the recall

Source: NHTSA recall 78V028000 and manufacturer quarterly reports. Started by the manufacturer.

What's wrong

The problem

THE STEERING PITMAN ARM IS SUBJECT TO FAILURE AT THE AREA OF THE TRANSITION TO THE ARM OFFSET DUE TO HIGH STRESS CONCENTRATIONS.

What to do

The fix

DEALER WILL REPLACE THE STEERING PITMAN ARM, STEERING GEAR OUTPUT SHAFT AND STEERING GEAR MOUNTING BRACKET.

VEHICLE DESCRIPTION: TRUCKS.SYSTEM: STEERING; STEERING PITMAN ARM.CONSEQUENCES OF DEFECT: PITMAN ARM FAILURE COULD CAUSE LOSS OF VEHICLE CONTROLWITHOUT PRIOR WARNING AND A POTENTIAL VEHICLE ACCIDENT.

Recall repairs are free. Confirm whether this recall is open on your vehicle by entering its VIN at nhtsa.gov/recalls.

1 model

Vehicles in this recall

Mack HMM6856s1973, 1974, 1975, 1976, 1977

Built from January 1, 1973 to January 1, 1977. Not every vehicle in these model years is included; check by VIN.