NHTSA recall 09V194000
Service brakes, air › Supply › Quick release valve
Mack Leu and 1 more
The defect
Mack IS recalling 338 model year 2009 mru and leu heavy duty trucks manufactured from august 20 through november 26, 2008 equipped with certain haldex quick release valves (qrv). the rubber diaphragm inside the qrv may experience delamination resulting in significant levels of air pressure leakage past and/or through the diaphragm, or the development of a bubble in the diaphragm which may trap air pressure in the valve and not allow the service brakes to release.
The risk
Malfunction of the air brake system could result in a vehicle crash.
The remedy
Mack will notify owners and repair the affected vehicle free of charge. the safety recall IS expected to begin on or about july 13, 2009. owners can contact mack toll-free at 1-800-866-1177.