Hendrickson USA. L.L.C.: Safety Recalls in 2009

HENDRICKSON IS RECALLING 138 AIR CONTROL KIT ASSEMBLIES IN LIFT AXLE AND SUSPENSION APPLICATIONS EQUIPPED WITH HALDEX QUICK RELEASE VALVES (QRV). HENDRICKSON ALSO SELLS THE HALDEX QRV FOR SERVICE PURPOSES UNDER PART NUMBER VA-1129. 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. A REDUCTION OF PRESSURE IN THE LIFT AXLE RIDE AIR SPRINGS CAN REDUCE THE LIFT AXLE'S LOAD CARRYING CAPACITY. IN ADDITION, ANY TRAPPED AIR PRESSURE IN THE QRV MAY PREVENT THE ABILITY TO EXHAUST LIFT AXLE RIDE AIR SPRINGS IN ORDER TO RAISE THE LIFT AXLE. REDUCTION OF PRESSURE IN THE SUSPENSION AIR SPRINGS CAN LOWER THE VEHICLE RIDE HEIGHT. IN ADDITION, ANY TRAPPED AIR PRESSURE IN THE QRV MAY PREVENT THE ABILITY TO RAISE AND/OR LOWER THE AIR SUSPENSION TO THE PROPER RIDE HEIGHT.