Mack RD8, CV +8 more: Brakes

Affects Mack RD8, CV, RD6, DM6, CX, LE, CL, CH, DMM, MR · 2003 — about 106 vehicles.

The hazard

Certain vehicles do not comply with the requirements of CMVSS 121 "Air Brake Systems". Due to improper seating of the check valve retainer in the brass fitting housing, it is possible for the air brake system pressure to push the check valve internal parts into the primary system reservoir and a vehicle operator would not know that this has happened. In this condition, the vehicle would not meet the emergency requirements of the standard. Correction: Dealer will replace the check 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