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Mack CXU Recall 15V025: Brake Actuator May Trap Air and Cause Brake Drag, Fire

NHTSA campaign 15V025, reported January 22, 2015, 349 vehicles potentially affected.

What this recall means for you

The internal rubber diaphragm in certain air brake actuators may not be fully attached to the parking brake mechanism. This can allow air to leak past the diaphragm and become trapped in the parking brake section, which may keep the brake from fully releasing.

The trapped pressure can cause brake drag and overheated wheel-end service brakes, which increases the risk of a fire. Owners should watch for signs of brake problems and follow the recall process.

Mack will notify owners, and authorized dealers will inspect the brake actuator and replace it if necessary, at no cost to the owner. Owners can contact Mack customer service at 1-610-709-2131 (recall number SC0387), and can check their VIN for 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 15V025Mack Trucks, Inc.
Component
PARKING BRAKE:DRIVELINE:HYDRAULIC:ACTUATOR
Problem
Mack Trucks, Inc. (Mack) is recalling certain model year 2015 and 2016 CXU and LEU trucks manufactured May 20, 2014, to March 24, 2015, equipped with certain Haldex Life Seal Type 30/30 Long Stroke Air Brake Actuators manufactured from January 9, 2014, through February 3, 2015. 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.
Risk
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 began March 20, 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.

Affected vehicles

Mack CXU2016
Mack LEU20152016
Mack Pinnacle (Cxu)2015