1974 MACK R SERIES Recall

Campaign:

80V053000 on 07/30/1980

Component:

Steering:linkages:knuckle:spindle:arm

Manufactured:

09/30/1968 - 08/31/1976

Affected:

219

Defect:

The steering arm may develop cracks due to insufficient fatigue life in the machine radius of the taper at the steering knuckle end.

Correction:

Install steering arms that have been magna-flux inspected for cracks and shot peened for improved fatigue life. this will be done without charge.

Notes:

Vehicle description: trucks.system: steering assembly; steering arm.consequences of defect: continued operation could lead to failure of thesteering arm, loss of steering control without prior warning, and potential forvehicle accident.

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