NHTSA Recall 07V361000
NHTSA Campaign Id 07V361000; Date: Aug. 15, 2007
This condition can cause a delay in the application of the spring brakes to park the vehicle after the operator pulls the dash valve button. These conditions can occur without warning, leading to unintended vehicle rollaway, brake drag, or in the case of loss of primary circuit, inability to modulate the spring brakes.
Recalled Vehicles:
2005 Mack CHN; 2006 Mack CHN; 2007 Mack CHN; 2008 Mack CHU; 2006 Mack CTP; 2004 Mack CV; 2005 Mack CV; 2006 Mack CV; 2007 Mack CV; 2008 Mack CV; 2005 Mack CXN; 2006 Mack CXN; 2007 Mack CXN; 2008 Mack CXN; 2008 Mack CXU; 2008 Mack GU
Component: Service Brakes, Air:supply:check Valve
Manufactured by: Mack Trucks, Inc
Affected Units:: 21,847
Recall Summary:
On certain trucks equipped with parker single check valves (scv) provided by bendix. The defect exists in the parker scv that connects with the supply port of the sr-7 spring brake modulating valve. After prolonged use of the parker scv, the valve body retainer may become excessively worn and eventually break apart. Pieces of the parker scv can become lodged inside the sr-7 spring brake modulating valve, potentially causing either leakage out of the sr-7 valve or preventing air from properly exhausting from the sr-7 valve.
How to Fix:
Mack is working with bendix to replace the parker single check valve. The recall began on January 9, 2008. Owners may contact bendix at 1-440-329-9000 or mack at 1-800-528-6586.
Recall Notes:
Mack recall no. Sc0334 (sc0327). Customers may contact the national highway traffic safety administration's vehicle safety hotline at 1-888-327-4236 (tty: 1-800-424-9153); or go to http://www.safercar.gov.
Date Owners notified by Manufacturer: Jan 9, 2008
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