NEWMAR IS RECALLING 63 MODEL YEAR 2009 AND 2010 RECREATIONAL VEHICLES MANUFACTURED BETWEEN JULY 21, 2008 AND APRIL 22, 2009, 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.