1973–1977 Mack Hmm6856s Recall

TRUCKS EQUIPPED WITH POWER STEERING. A DEFICIENCY EXISTS IN THE PITMAN ARM CAUSED BY VENDOR AND MACK PART NUMBERS CAST INTO THE ARM. THE CAST NUMBERS CAUSE A STRESS CONCENTRATION THAT COULD LEAD TO A PITMAN ARM FAILURE CAUSING A LOSS OF VEHICLE CONTROL WITHOUT PRIOR WARNING TO THE OPERATOR.

MACK HMM6856S