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Mack Pinnacle (Cxu) Recall 15V521: Brake Chambers May Be Mounted Wrong, Risking Loss of Braking

NHTSA campaign 15V521, reported August 17, 2015, 79 vehicles potentially affected.

What this recall means for you

On certain 2013-2015 Mack Pinnacle trucks built between October 3, 2012, and February 18, 2014, and equipped with Meritor air disc brakes, the brake chambers may have been incorrectly mounted. This can allow internal contamination of the air brake calipers.

Contamination of the calipers may cause a loss of braking on one wheel. That lengthens the distance needed to stop the truck and increases the risk of a crash.

Dealers will inspect the disc brake caliper and brake chamber to check whether the washers are in the correct position. If they are, no further action is needed. If not, the caliper and brake chamber will be replaced and two washers will be added per brake assembly, free of charge at an authorized dealer. Owners can contact Mack customer service at 1-800-866-1177, and should check their VIN for any open recalls.

Check whether this recall is open on your vehicle

The repair is normally free at an authorized dealer.

Official recall notice

Safety recall 15V521Mack Trucks, Inc.
Component
SERVICE BRAKES, AIR:DISC:CHAMBER
Problem
Mack Trucks, Inc. (Mack) is recalling certain model year 2013-2015 Pinnacle (CXU) trucks manufactured from October 3, 2012, through February 18, 2014 and equipped with Meritor air disc brakes. In the affected vehicles, the brake chambers may have been incorrectly mounted resulting in internal contamination of the air brake calipers.
Risk
Contamination of the calipers may cause a loss of brakes on one wheel, lengthening the distance required to stop the vehicle, increasing the risk of a crash.
Remedy
Mack will notify owners, and dealers will inspect the disc brake caliper and brake chamber to determine if the washers are located in the correct position. If the washers are in the correct position, no further action is required. If the washers are not located in the correct position, replacement of the disc brake caliper and brake chamber will be performed and the addition of two washers per brake assembly will be installed, free of charge. The recall began on September 30, 2015. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0392.
Notes
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.

Affected vehicles

Mack Pinnacle (Cxu)201320142015