SERVICE BRAKES, AIR:SUPPLY:LOW PRESSURE WARNING:SWITCH
Sep 14, 1997
40 units potentially affected
The defect: VEHICLE DESCRIPTION: HEAVY DUTY 6X4 TRUCKS EQUIPPED WITH EITHER HENDRICKSON RT/RS SERIES SUSPENSIONS OR CHALMERS 800 SERIES SUSPENSIONS, WITH A WHEEL BASE GREATER THAN 250 INCHES, AND WESTERN STAR'S AIR '96' AIR BRAKE SYSTEM WITHOUT ANTI-LOCK BRAKES. THESE VEHICLES DO NOT MEET THE AIR BRAKE RELEASE TIME REQUIRED BY FMVSS NO. 121, "AIR BRAKE SYSTEMS."
The risk: AIR BRAKE RELEASE TIME MAY BE LONGER THAN ANTICIPATED BY THE OPERATOR INCREASING THE RISK OF A VEHICLE CRASH.
The remedy: DEALERS WILL INSTALL AN IN-LINE QUICK RELEASE VALVE IN EACH OF THE DROP LINES TO THE REAR MOST BRAKE CHAMBERS.
WESTERN STAR TRUCKS, INC.View on NHTSA.gov