Certain International 1998-2002 medium- and heavy-duty trucks are among the August recalls announced Oct. 2 by the National Highway Traffic Safety Administration for potential brake problems. 4700, 4800, 4900, 5000, 8000 and 9000 models built between August 1997 and February 2002 are affected.

According to the recall notice, a brass fitting connects the double check valve to the brake relay valve. With certain inputs to the vehicle, the weight of the check valve on the fitting can cause the assembly to resonate.

The subject vibration can cause excessive strain levels in the fitting, which could eventually fatigue and fail. If the fitting breaks, the rear service brakes will cease to operate without warning, resulting in extended stopping distance and increased risk of a crash.

NHTSA says dealers will install a kit to remount the double check valve with a flexible hose on the majority of vehicles. On a small number of units with clearance issues or traction control, a kit with a new relay valve that has a built-in double check valve will be installed.

Owner notification began in mid August, according to the notice. Owners who do not receive a free remedy within a reasonable time should contact International at 1-800-448-7825.

Consumers can get up-to-the-minute information on safety recalls, or information on the recall history of a particular make and model of vehicle by calling the agency's toll-free Auto Safety Hotline at 1-888-327-4236, or on the Internet at www.nhtsa.dot.gov. The Hotline also can be used to report safety problems.