Mack · Canada · Crit
Mack R, U +2 more: Not Entered
Affects Mack R, U, MC, F · 1979–1980 — about 1K vehicles.
The hazard
VEHICLES MAY BE QEUIPPED WITH TRACTOR PARK VALVE CONTROL KNOBS MANUFACTURED BY POLYFLEX CONTROLS THAT MAY BREAK AT THE KNOB RETAINING PIN HOLE LOCATION. THIS CONDITION WOULD RENDER THE TRACTOR PARK VALVE INOPERATIVE AND UNDER CERTAIN CONDITIONS COULD ALLOW AN UNATTENDED CHASSIS TO ROLLAWAY.
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