Recall
Mack U — 78V171000
NHTSA ID
78V171000
Make
Mack
Model
U
Years Affected
1974
Recall Date
1978-08-08
Component
STEERING:LINKAGES:KNUCKLE:SPINDLE:ARM
Units Affected
2,100
Completion Rate
—
Mfr Campaign No.
Summary
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.
Remedy
DEALER WILL INSPECT AND, IF NECESSARY, REPLACE THE LEFT STEERING KNUCKLE WITH AN IMPROVED TYPE OF KNUCKLE.