Mack · Canada · High
Mack MC, F +2 more: Not Entered
Affects Mack MC, F, U, R · 1979–1980 — about 2K vehicles.
The hazard
THE BRAKE CONTROL KNOB COULD FALL OFF DUE TO THE LOCATION OF THE HOLE FOR THE RETAINING PIN BEING OFF THE CENTERLINE OF THE HOLE FOR THE VALVE PLUNGER. WHEN THE RETAINING PIN IS INSTALLED, THE MISALIGNMENT CREATES EXCESSIVE STRESS AROUND THE HOLE FOR THE PIN AND THE PLASTIC FAILS. THE LOSS OF KNOB COULD IMPAIR OPERATION OF THE HAND CONTROL BRAKE VALVE.
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