Statutes, codes, and regulations
Pennsylvania Code (Rules and Regulations)
Title 67 - TRANSPORTATIONPart I - Department of TransportationSubpart A - Vehicle Code ProvisionsArticle VII - Vehicle CharacteristicsChapter 175 - VEHICLE EQUIPMENT AND INSPECTION
Subchapter O - VEHICLE SUN SCREENING DEVICES
Appendix A - MINIMUM REQUIREMENTS FOR MOTOR VEHICLE BRAKE LININGS-SAE J998

Pa. Code tit. 67, pt. I, subpt. A, art. VII, ch. 175, subch. O, app A

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Current through Register Vol. 54, No. 50, December 14, 2024
Appendix A - MINIMUM REQUIREMENTS FOR MOTOR VEHICLE BRAKE LININGS-SAE J998

SAE Recommended Practice

1. Scope-This specification covers brake linings used on motor vehicles operated on the public ways, except those used only for parking brakes. The performance requirements outlined in this SAE Recommended Practice are based on currently available engineering data. It is intended that all portions of this recommended practice will be reviewed periodically and revised as additional knowledge regarding brake lining performance is developed.

2. Purpose-The purpose of this SAE Recommended Practice is to establish minimum coefficient of friction requirements for brake linings used in the service brake system of a motor vehicle. Linings that meet these minimum friction requirements may not be suitable for use on all vehicles because of differences in brake design or application.

3. Test Procedures-Five complete tests shall be conducted on each brake lining in accordance with the SAE J661.

4. Brake Lining Evaluation-Brake linings shall be evaluated for normal and hot friction coefficients in accordance with SAE J866.

5. Minimum Requirements-To meet minimum requirements a brake lining shall have:

5.1. A normal friction coefficient over .25 based on the average of five tests.

5.2. A hot friction coefficient over .15 based on the average of five tests.

5.3. A coefficient of friction of .15 or over on each of the five tests at the following points:

5.3.1. Between 200F and 550F, inclusive, on the second fade run.

5.3.2. Between 300F and 200F, inclusive, on the second recovery run.

5.4. Not more than a 20% or .050 variation of coefficient of friction, whichever is greater, below the average value of all five tests at each temperature point specified in paragraph 5.3.

(Report of SAE Brake Committee approved January 1968.)

Pa. Code tit. 67, pt. I, subpt. A, art. VII, ch. 175, subch. O, app A

The provisions of this Appendix A readopted December 2, 1988, effective 12/3/1988, 18 Pa.B. 5362.

This appendix cited in 67 Pa. Code § 175.64 (relating to braking systems); 67 Pa. Code § 175.94 (relating to braking systems); 67 Pa. Code § 175.96 (relating to lighting and electrical systems); 67 Pa. Code § 175.123 (relating to braking systems); 67 Pa. Code § 175.144 (relating to braking systems); and 67 Pa. Code § 175.173 (relating to braking systems).