Mack Recall 78V171000: Steering, Linkages, Knuckle, Spindle, Arm

NHTSA recall 78V171000 · announced August 8, 1978 · filed by Mack Trucks, Incorporated · 2,100 units affected

The problem

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.

Official NHTSA recall notice →

Notes

VEHICLE DESCRIPTION: TRUCK TRACTORS.SYSTEM: STEERING; STEERING KNUCKLE.CONSEQUENCES OF DEFECT: LOSS OF STEERING CONTROL COULD CAUSE A VEHICLEACCIDENT.

Vehicles covered by this recall

• 1971 Mack F
• 1972 Mack F
• 1973 Mack F
• 1974 Mack F
• 1971 Mack Mb
• 1972 Mack Mb
• 1973 Mack Mb
• 1974 Mack Mb
• 1971 Mack R
• 1972 Mack R
• 1973 Mack R
• 1974 Mack R
• 1971 Mack U
• 1972 Mack U
• 1973 Mack U
• 1974 Mack U

Source: National Highway Traffic Safety Administration public recall data. This page reports official records and is not legal, medical, or repair advice.