Mack · Canada · Mod
Mack Truck: Steering
Affects Mack Truck · 1982–1985 — about 4K vehicles.
The hazard
ON MODELS WITH FA536,FA537 OR FA538 SERIES FRONT STEERING AXLE,THE RACE OF THE STEERING KNUCKLE THRUST BEARING CAN BREAK DOWN AND EVENTUALLY SHATTER DUE TO EMBRITTLEMENT.THIS COULD CAUSE THE KINGPIN TO DROP OUT OF ITS TAPERED RECEPTACLE, CAUSING A BINDING ACTION BETWEEN THE AXLE EYE AND THE KNUCKLE RESULTING IN INCREASED STEERING DRAG AND POSSIBLE STEERING LOCK UP.
What to do
Contact your dealer; the remedy details were not included in the filing.
Critical — crash/injury risk now
High — injury risk; see remedy
Moderate — fix at next service
Low — minor / informational