Driveline: airRecall 79V-059 · 1978 Kenworth W900
PACCAR, INCORPORATED recall 79V-059 covers 2,620 1978 Kenworth W900 for a driveline: air problem, reported to NHTSA on February 23, 1979.
Source: NHTSA recall 79V059000 and manufacturer quarterly reports. Started by the manufacturer.
The problem
THE PARKING BRAKE VALVES MAY HAVE BEEN INCORRECTLY PIPED. IF THE PARKING BRAKE PIPING IS INCORRECTLY ROUTED, THERE IS NO WAY TO SET THE TRACTOR PARKING BRAKES INDEPENDENTLY OF THE TRAILER PARKING BRAKES. THIS COULD CAUSE THE PARKING BRAKES TO BACK OFF WHILE THE TRAILER AIR SUPPLY IS BEING CHARGED, CAUSING THE TRACTOR TO ROLL.
The fix
TRAILER AIR SUPPLY WILL BE MOVED FROM THE DISCHARGE SIDE OF THE TRACTOR PARKING VALVE TO THE DISCHARGE SIDE OF THE COMBINATION PARKING VALVE. THIS SERVICE WILL BE DONE AT NO CHARGE.
VEHICLE DESCRIPTION: TRUCKS.SYSTEM: PARKING EMERGENCY BRAKES; AIR, VALVE, CONTROL.CONSEQUENCES OF DEFECT: IF THE TRACTOR AND TRAILER ROLL FREE, A VEHICLEACCIDENT AND PERSONAL INJURY MAY OCCUR.
Recall repairs are free. Confirm whether this recall is open on your vehicle by entering its VIN at nhtsa.gov/recalls.
Vehicles in this recall
Built from June 1, 1978 to November 1, 1978. Not every vehicle in these model years is included; check by VIN.