Correct answer
Loss of effectiveness due to excessive heating.
Loss of braking effectiveness from excessive heat, for example after prolonged service-brake use on a descent. Prevent it by choosing suitable speed and gear and using auxiliary systems under manufacturer instructions. If braking effectiveness falls, maintain control and stop safely as conditions allow; do not simply stop braking indiscriminately or assume a retarder replaces every necessary brake application.
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A device that prevents the wheels from locking.
A system similar to the brake servo, aimed at requiring less pressure on the pedal.
Loss of effectiveness due to excessive heating.
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