[Code of Federal Regulations]

[Title 49, Volume 4]

[Revised as of October 1, 2005]

From the U.S. Government Printing Office via GPO Access

[CITE: 49CFR229.73]



[Page 394]

 

                        TITLE 49--TRANSPORTATION

 

       CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF 

                             TRANSPORTATION

 

PART 229_RAILROAD LOCOMOTIVE SAFETY STANDARDS--Table of Contents

 

                      Subpart C_Safety Requirements

 

Sec. 229.73  Wheel sets.



    (a) The variation in the circumference of wheels on the same axle 

may not exceed \1/4\ inch (two tape sizes) when applied or turned.

    (b) The maximum variation in the diameter between any two wheel sets 

in a three-powered-axle truck may not exceed \3/4\ inch, except that 

when shims are used at the journal box springs to compensate for wheel 

diameter variation, the maximum variation may not exceed 1\1/4\ inch. 

The maximum variation in the diameter between any two wheel sets on 

different trucks on a locomotive that has three-powered-axle trucks may 

not exceed 1\1/4\ inch. The diameter of a wheel set is the average 

diameter of the two wheels on an axle.

    (c) On standard gauge locomotives, the distance between the inside 

gauge of the flanges on non-wide flange wheels may not be less than 53 

inches or more than 53\1/2\ inches. The distance between the inside 

gauge of the flanges on wide flange wheels may not be less than 53 

inches or more than 53\1/4\ inches.

    (d) The distance back to back of flanges of wheels mounted on the 

same axle shall not vary more than \1/4\ inch.