MACK U 1972: STEERING:LINKAGES:KNUCKLE:SPINDLE:ARM

Make : MACK Model : U Year : 1972
Build Dates : 0000-00-00 - 0000-00-00
NHTSA CAMPAIGN ID Number : 78V171000
Date Owner's Notified: 1979-08-10 Date Received by ODI: 1978-08-08 Date Added to Database: 1979-10-12
Manufacturers Involved: Mack Trucks, Inc.
Manufacturer's Responsible for the Recall:
Manufacturer Campaign Number:
Component: STEERING:LINKAGES:KNUCKLE:SPINDLE:ARM
Potential Number Of Units Affected : 2100
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.
Consequence:
     
Remedy:
      DEALER WILL INSPECT AND, IF NECESSARY, REPLACE THE LEFT STEERING KNUCKLE WITH AN IMPROVED TYPE OF KNUCKLE.
Report Initiator: MFR V Report
Regulation Part Number: Federal Motor Vehicle Safety Standard Number:
Notes:
      VEHICLE DESCRIPTION: TRUCK TRACTORS.SYSTEM: STEERING; STEERING KNUCKLE.CONSEQUENCES OF DEFECT: LOSS OF STEERING CONTROL COULD CAUSE A VEHICLEACCIDENT.