Mack Recall 85V159000: Parking Brake, Driveline, Hydraulic, Hoses, Lines/piping, And Fittings

NHTSA recall 85V159000 · announced November 26, 1985 · filed by Mack Trucks, Incorporated · 3,308 units affected

The problem

THE QUICK RELEASE VALVE SUPPORT BRACKET MOUNTED ON THE AXLE MAY CRACK. THIS CAUSES FATIGUE FAILURE OF THE STEEL AIR LINES LEADING TO THE REAR PARKING BRAKES AND CHASSIS SERVICE BRAKES RESULTING IN SUDDEN LOSS OF AIR PRESSURE. CONSEQUENCE OF DEFECT: THIS SUDDEN LOSS OF AIR TO THE BRAKE CHAMBERS WILL RESULT IN AUTOMATIC ACTUATION OF REAR PARKING BRAKE CAUSING SUDDEN REAR WHEEL LOCKUP WHICH MAY CONTRIBUTE TO AN ACCIDENT.

What to do

INSTALL A REDESIGNED VALVE SUPPORT BRACKET.

Official NHTSA recall notice →

Notes

SYSTEM: PARKING BRAKES AIR LINES, QUICK RELEASE VALVE BRACKET.VEHICLE DESCRIPTION: MID-LINER TRUCKS.

Vehicles covered by this recall

• 1984 Mack Mr600p
• 1985 Mack Mr600p
• 1984 Mack Ms250p
• 1985 Mack Ms250p

Source: National Highway Traffic Safety Administration public recall data. This page reports official records and is not legal, medical, or repair advice.