PACCAR issued a recall on the T660T800, and W900 models

On certain vehicles, the caliper mounting fasteners attaching the air disc brake caliper assembly to the torque plate may have received insufficient tightening torque during the assembly process. Insufficient torque may allow the caliper mounting fasteners and/or the caliper itself to become loose. This could cause the brake on the affected wheel end to become inoperable. Extended stopping distance could result in a vehicle crash causing property damage, personal injury or death. Correction: Dealers will replace caliper mounting fasteners and inspect the caliper assembly.