WASHINGTON - Volvo Trucks North America is recalling more than 6,100 MY 2007-2009 VHD, MY 2006-2010 VN and MY 2007-2009 VT trucks with an air-release fifth wheel. The inversion valve on the frame may be oriented in a way that allows contaminants to enter the valve through the exhaust port. 

This condition poses the risk of brake valve corrosion, which in turn creates a safety risk, the National Highway Traffic Safety Administration said. 

Dealers will inspect the inversion valve and replace it if necessary. This service will be performed free of charge. 

The safety recall is expected to get underway around Jan. 10, 2011. Owners can contact Volvo Trucks at (800) 528-6586.