FEDERAL REGULATIONS

§393.53 Automatic Brake Adjusters and Brake Adjustment Indicators.

(a) Automatic brake adjusters (hydraulic brake systems).
Each commercial motor vehicle manufactured on or after October 20, 1993, and equipped with a hydraulic brake system, shall meet the automatic brake adjustment system requirements of Federal Motor Vehicle Safety Standard No. 105 (49 CFR 571.105, S5.1) applicable to the vehicle at the time it was manufactured.

(b) Automatic brake adjusters (air brake systems).
Each commercial motor vehicle manufactured on or after October 20, 1994, and equipped with an air brake system, shall meet the automatic brake adjustment system requirements of Federal Motor Vehicle Safety Standard No. 121 (49 CFR 571.121, S5.1.8) applicable to the vehicle at the time it was manufactured.

(c) Brake adjustment indicator (air brake systems).
On each commercial motor vehicle manufactured on or after October 20, 1994, and equipped with an air brake system which contains an external automatic adjustment mechanism and an exposed pushrod, the condition of service brake under–adjustment shall be displayed by a brake adjustment indicator conforming to the requirements of Federal Motor Vehicle Safety Standard No. 121 (49 CFR 571.121, S5.1.8) applicable to the vehicle at the time it was manufactured.

[60 FR 46245, Sept. 6, 1995]

THIS PRODUCT IS TO BE USED AS A VISUAL INDICATOR OF BRAKE ADJUSTMENT ONLY. ACTUAL BRAKE COMPONENT INSPECTION, CALIBRATED ADJUSTMENT AND ASSOCIATED BRAKE MAINTENANCE MUST BE PERFORMED BY A CERTIFIED BRAKE MECHANIC IN ACCORDANCE WITH FEDERAL REGULATIONS. THIS PRODUCT WILL ALLOW VISUAL INSPECTIONS ONLY WHEN INSTALLED BY A CERTIFIED BRAKE MECHANIC AND PERIODICALLY INSPECTED FOR WEAR AND ACCURACY.

Set of two indicators
$14.99 plus shipping & handling