Mack 1971–1974 Steering recall
Recalled August 8, 1978 · NHTSA recall 78V171000 · Mack
Remedy
DEALER WILL INSPECT AND, IF NECESSARY, REPLACE THE LEFT STEERING KNUCKLE WITH AN IMPROVED TYPE OF KNUCKLE.
Units
2,100 units
Description
DEFICIENCIES, IN THE FORM OF FORGING LAPS, CRACKS AND EXCESSIVE DECARBURIZATION DURING HEAT TREATMENT, EXIST IN THE STEERING KNUCKLES. STRESSES IMPOSED WITH INTEGRAL HYDRAULIC POWER STEERING MAY LEAD TO A FAILURE IN THE AREA OF THE STEERING ARM ATTACHING BOSS. THIS TYPE OF FAILURE WOULD CAUSE LOSS OF STEERING CONTROL.
What to do
DEALER WILL INSPECT AND, IF NECESSARY, REPLACE THE LEFT STEERING KNUCKLE WITH AN IMPROVED TYPE OF KNUCKLE.
Product
Mack F · Mack MB · Mack R · Mack U
Manufacturer(s)
Mack Trucks, Inc.
Source: U.S. National Highway Traffic Safety Administration. Official recall notice on nhtsa.gov →