1977 MACK HMM6856S Recall

Campaign:
78V028000 on 10/11/1979
Component:
Steering:linkages
Manufactured:
12/31/1972 - 12/31/1976
Affected:
100
Defect:
The steering pitman arm is subject to failure at the area of the transition to the arm offset due to high stress concentrations.
Correction:
Dealer will replace the steering pitman arm, steering gear output shaft and steering gear mounting bracket.
Notes:
Vehicle description: trucks.system: steering; steering pitman arm.consequences of defect: pitman arm failure could cause loss of vehicle controlwithout prior warning and a potential vehicle accident.

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