OFFICIAL NHTSA RECALL
85V124000
Parking Brake:driveline:air:chamber
Reported Oct 7, 1985 · GENERAL MOTORS CORP.
Summary
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.
Consequence
Not supplied in the source record.
Remedy
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.
This campaign page uses the representative official campaign record. Applicability-specific source variants appear on the linked vehicle pages. Recall counts refer to campaigns, not affected vehicles.
Vehicle entries in this campaign
This is model-level recall history. It does not confirm whether a particular VIN is affected or has received the repair. Check with NHTSA ↗