Code of Federal Regulations Title 30. Mineral Resources § 30.75.523–3 Automatic emergency-parking brakes

(1) On and after May 23, 1989—

(2) On and after May 23, 1991, all other equipment.

(1) Be activated immediately by the emergency deenergization device required by 30 CFR 75.523–1 and 75.523–2;

(2) Engage automatically within 5.0 seconds when the equipment is deenergized;

(3) Safely bring the equipment when fully loaded to a complete stop on the maximum grade on which it is operated;

(4) Hold the equipment stationary despite any contraction of brake parts, exhaustion of any non-mechanical source of energy, or leakage;  and

(5) Release only by a manual control that does not operate any other equipment function.

(1) Apply the brakes manually without deenergizing the equipment;  and

(2) Release and reengage the brakes without energizing the equipment.

(1) On the maximum grade on which it is operated;  and

(2) Despite any contraction of components, exhaustion of any non-mechanical source of energy, or leakage.