[Code of Federal Regulations]
[Title 49, Volume 5]
[Revised as of October 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR393.53]

[Page 410]
 
                        TITLE 49--TRANSPORTATION
 
                      DEPARTMENT OF TRANSPORTATION
 
PART 393_PARTS AND ACCESSORIES NECESSARY FOR SAFE OPERATION--Table of 
Contents
 
                            Subpart C_Brakes
 
Sec.  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]