Report Receipt Date: JAN 22, 2015
NHTSA Campaign Number: 15V025000
Component(s): PARKING BRAKE
Potential Number of Units Affected: 274

Manufacturer: Mack Trucks, Inc.

SUMMARY:
Mack Trucks, Inc. (Mack) is recalling certain model year 2015 CXU trucks manufactured May 20, 2014, to November 12, 2014 equipped with certain Haldex Life Seal Type 30/30 Long Stroke Air Brake Actuators manufactured January 9, 2014, to October 28, 2014. The affected actuators may have an incomplete attachment of the internal rubber diaphragm to the actuation mechanism of the parking brake section of the Life Seal actuator.
CONSEQUENCE:
If the diaphragm is not completely attached, there may be internal leakage from the service section past the diaphragm, potentially trapping air pressure in the parking brake section. This air pressure in turn, if not vented, may prevent full release of the actuator unit, and may induce brake drag and may result in overheated wheelend service brakes, increasing the risk of a fire.
REMEDY:
Mack will notify owners, and dealers will inspect the brake actuator and replace, as necessary, free of charge. The recall is expected to begin February 27, 2015. Owners may contact Mack customer service at 1-610-709-2131. Mack's number for this recall is SC0387.
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.