PORTLAND, Ore. – Daimler-Trucks North America, LLC (DTNA) has agreed to recall four model-year 2022 Freightliner Cascadia trucks which might have faulty double-check valves that may result in locking the rear axle.
The four vehicles are from a limited-production run of vehicles including the double-check valve for towing or decking purposes.
According to the National Highway Traffic Safety Administration Part 573 Safety Recall Report 22V-374, “On a specific DTNA-owned truck used for testing purposes, the double check valve was found to be trapping air in the backup pneumatic air circuit under rare situations. Trapped air may cause unintended or prolonged service brake application, which may result in rear axle to lock while the vehicle is in motion.”
The safety risk from such an action, according to the NHTSA report, “Rear axle locking up while the vehicle is in motion may result in generation of additional frictional force, which may cause the brake components to fail prematurely due to over time heat buildup. In rare cases, especially if the axle lock up is ignored by the driver, may increase the vehicle stopping distance, increasing the risk of a crash.”
There have not been any reports of crashes due to this issue.
DTNA has determined the remedy to be removing the double-check valve from the towing pneumatic circuit vehicles, which will be performed at no cost to the vehicles’ owners.
Dealers and owners are scheduled to be notified by July 23rd.