Mack · Canada · High
Mack RWL, WL +2 more: Not Entered
Affects Mack RWL, WL, RWS, WS · 1977–1979 — about 11 vehicles.
The hazard
TRUCKS EQUIPPED WITH MANUAL STEERING. SUBJECT VEHICLES MAY HAVE BEEN BUILT WITH PITMAN ARM RETAINING NUTS THAT WERE NOT TORQUED TO SPECIFICATION. THIS CONDITION COULD RESULT IN INADEQUATE RETENTION OF THE NUT TO THE OUTPUT SHAFT ALLOWING THE PITMAN ARM TO COME LOOSE. IF THIS CONDITION IS NOT CORRECTED, THE SPLINED GROOVES ON THE OUTPUT SHAFT COULD WEAR SMOOTH CAUSING A LOSS OF STEERING CONTROL.
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