Mack · Canada · Mod
Mack RM, HMM +1 more: Not Entered
Affects Mack RM, HMM, DMM · 1975 — about 0 vehicles.
The hazard
TRUCKS EQUIPPED WITH ROCKWELL MODEL FDS 1600 OR FDS 1802 FRONT DRIVING AXLE ASSEMBLIES FITTED WITH ROCKWELL ANTI-WHEEL LOCK SYSTEMS SOME ROCKWELL AXLE ASSEMBLIES EQUIPPED WITH ROCKWELL ANTI-WHEEL LOCK SYSTEMS MAY HAVE BEEN ASSEMBLED WITH IMPROPER SENSOR-TO-ROTOR GAP CAUSED BY INCORRECTLY ADJUSTED WHEEL BEARINGS AND/OR IMPROPERLY POSITIONED SENSORS. AT SLOW VEHICLE SPEEDS THAT ANTI-LOCK COMPUTER MAY FLASELY INTERPRET THE PULSES TRANSMITTED FROM A WHEEL AS BEING INDICATIVE OF A WHEEL LOCK-UP CONDITION AND THE AIR CONTROL SOLENOID ON THAT AXLE TILL BEGIN SWITCHING, RESULTING IN DECREASED BRAKE
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