---
kind: "section"
citation: "30 C.F.R. § 75.523-3"
title: "30"
number: "75.523-3"
heading: "Automatic emergency-parking brakes."
url: "https://uscodex.org/cfr/30/75.523-3"
---

# §75.523-3. Automatic emergency-parking brakes.

- (a) Except for personnel carriers, rubber-tired, self-propelled electric haulage equipment used in the active workings of underground coal mines shall be equipped with automatic emergency-parking brakes in accordance with the following schedule.
  - (1) **On and after May 23, 1989—**
    - (i) All new equipment ordered; and
    - (ii) All equipment originally furnished with or retrofitted with automatic emergency-parking brakes which meet the requirements of this section.
  - (2) **On and after May 23, 1991, all other equipment.**
- (b) **Automatic emergency-parking brakes shall—**
  - (1) Be activated immediately by the emergency deenergization device required by 30 CFR [75.523-1](/cfr/30/75.523-1.md) and [75.523-2](/cfr/30/75.523-2.md);
  - (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.**
- (c) Automatic emergency-parking brakes shall include a means in the equipment operator's compartment to—
  - (1) Apply the brakes manually without deenergizing the equipment; and
  - (2) **Release and reengage the brakes without energizing the equipment.**
- (d) On and after November 24, 1989, rubber-tired, self-propelled electric face equipment not covered by [paragraph (a)](#a) of this section shall be equipped with a means incorporated on the equipment and operable from each tramming station to hold the equipment stationary—
  - (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.**
- (e) The brake systems required by paragraphs [(a)](#a) or [(d)](#d) of this section shall be applied when the equipment operator is not at the controls of the equipment, except during movement of disabled equipment.

## Notes

### Amendments

[54 FR 12412, Mar. 24, 1989]

### Authority

Authority: 30 U.S.C. 811, 813(h), 957.

### Source

Source: 35 FR 17890, Nov. 20, 1970, unless otherwise noted.

### Amendments

[54 FR 12412, Mar. 24, 1989]