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NHTSA Campaign 91V205000

SERVICE BRAKES, AIR:ANTILOCK

Issued by VOLVO GM HEAVY TRUCK CORP · Reported Nov 22, 1991 · 171 vehicles affected

What's wrong

THE EXISTING INTERLOCK AIR BRAKE SYSTEM MUST GET ITS AIR SUPPLY DIRECTLY FROM THE PARKING BRAKE AIR SUPPLY CIRCUIT. SHOULD A COMPONENT FAILURE OCCUR IN THE INTERLOCK AIR SYSTEM, IT WILL DEPLETE THE AIR SUPPLY FROM THE PARKING BRAKE CIRCUIT.

Consequence

DEPLETION OF AIR SUPPLY FROM THE PARKING BRAKE CIRCUITWOULD ALLOW THE BUS TO ROLL WITH THE PARKING BRAKE APPLIED. THIS COULDRESULT IN A VEHICLE ACCIDENT.

Remedy

RELOCATE THE AIR SUPPLY LINE FOR THE INTERLOCK SYSTEM SO THAT THE AIR SUPPLY COMES FROM THE PARKING BRAKE CIRCUIT TO ENSURE THAT WHEN THE PARKING BRAKE IS APPLIED, THE PARKING BRAKE CANNOT BE DISENGAGED OR OVERRIDDEN BY COMPONENT FAILURES.

Vehicles affected by this recall

Make Model Year Units
VOLVO B10M 1984 171
VOLVO B10M 1985 171
VOLVO B10M 1986 171

Source: NHTSA Campaign 91V205000 on nhtsa.gov. To check the current repair status for a specific vehicle, use our free VIN decoder.