Parking Brake:driveline:air:chamber
NHTSA recall 85V124000 · announced October 7, 1985 · filed by General Motors Corp. · 4,870 units affected
The problem
THE REAR BRAKE RELEASE TIME MAY BE GREATER THAN THE TIME SPECIFIED IN FMVSS 121, "AIR BRAKE SYSTEM". IN ADDITION, SOME TRACTORS MAY HAVE WARPED PARKING BRAKE APPLY SPRINGS WHICH ALSO EFFECT THE REAR BRAKE RELEASE TIME. CONSEQUENCE OF DEFECT: TRACTORS FAIL TO MEET THE STOPPING DISTANCE SPECIFIED IN FMVSS 121 WHICH IS REQUIRED TO STOP THE TRUCK SAFELY.
What to do
INSTALL A QUICK RELEASE VALVE IN THE TRAILER SERVICE AIR LINE AND INCREASE THE DIAMETER OF THE REAR SERVICE BRAKE LINE. ALSO INSPECT REAR SPRING BRAKE CHAMBER AND RELEASE IF NECESSARY.
Notes
SYSTEM: AIR BRAKES. VEHICLE DESCRIPTION: TRACTORS EQUIPPED WITH RPO RQ3 TRACTOR APPLICATION.
Vehicles covered by this recall
Source: National Highway Traffic Safety Administration public recall data. This page reports official records and is not legal, medical, or repair advice.