[Code of Federal Regulations]
[Title 49, Volume 4]
[Revised as of October 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR229.75]

[Page 316]
 
                        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. 229.75  Wheels and tire defects.

    Wheels and tires may not have any of the following conditions:
    (a) A single flat spot that is 2\1/2\ inches or more in length, or 
two adjoining spots that are each two or more inches in length.
    (b) A gouge or chip in the flange that is more than 1\1/2\ inches in 
length and \1/2\ inch in width.
    (c) A broken rim, if the tread, measured from the flange at a point 
five-eighths inch above the tread, is less than 3\3/4\ inches in width.
    (d) A shelled-out spot 2\1/2\ inches or more in length, or two 
adjoining spots that are each two or more inches in length.
    (e) A seam running lengthwise that is within 3\3/4\ inches of the 
flange.
    (f) A flange worn to a \7/8\ inch thickness or less, gauged at a 
point \3/8\ inch above the tread.
    (g) A tread worn hollow \5/16\ inch or more on a locomotive in road 
service or \3/8\ inch or more on a locomotive in switching service.
    (h) A flange height of 1\1/2\ inches or more measured from tread to 
the top of the flange.
    (i) Tires less than 1\1/2\ inches thick.
    (j) Rims less than 1 inch thick on a locomotive in road service or 
less than \3/4\ inch on a locomotive in yard service.
    (k) A crack or break in the flange, tread, rim, plate, or hub.
    (l) A loose wheel or tire.
    (m) Fusion welding may not be used on tires or steel wheels of 
locomotives, except for the repair of flat spots and worn flanges on 
locomotives used exclusively in yard service. A wheel that has been 
welded is a welded wheel for the life of the wheel.

                            Electrical System