Recall 78V210000: 1977–1978 Mack RD and 1 other model

Report received

Oct 3, 1978

Manufacturer

Mack trucks, incorporated

Potentially affected

19,370vehicles

Model years

1977–1978

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

Delays of up to about 2 seconds may exist in the brake application times to the brakes on the bogie axles in the presence of certain types of wheel speed sensor signal discontinuities or distortions that may occur as a result of sensor wire failure. This constitutes a non-compliance to federal motor vehicle safety standard no. 121, "air brake systems".

Remedy

Dealer will install new wheel speed sensors that incorporate improved wiring and the present bogie anti-wheel lock system will be changed to an axle-to-axle system for improved reliability.

Affected model years

Pages for each model year show complaints, parts, mileage and other recalls.

• 1977 Mack DM0 complaints
• 1978 Mack DM0 complaints
• 1977 Mack RD0 complaints
• 1978 Mack RD0 complaints