Recall 78V030000: Mack trucks, incorporated

Report received

Feb 9, 1978

Manufacturer

Mack trucks, incorporated

Potentially affected

400vehicles

Model years

—

Check your own vehicle. A recall applies only to vehicles within the affected build range. Enter your VIN at nhtsa.gov/recalls. Recall repairs are free at a franchised dealer.

What NHTSA recorded

A design deficiency exists in the air dryer piping in the area of the pressure relief valve and compressor governor control link. Moisture is passed and builds up in this relief valve and control line. In freezing ambient temperatures, this moisture may freeze, allowing the chassis air system pressure to exceed 150 psi. Excessive air system pressure can cause separation of air piping connections and air system valve failure.

Remedy

The dealer will relocate the air system compressor governor line and pressure relief valve to eliminate moisture accumulation.