Title 49: Transportation
PART 229—RAILROAD LOCOMOTIVE SAFETY STANDARDS
Subpart C—Safety Requirements
Suspension System
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§ 229.75 Wheels and tire defects.
Wheels and tires may not have any of the following conditions:
(a) A single flat spot that is 21/2inches 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 11/2inches in length and1/2inch 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 33/4inches in width.
(d) A shelled-out spot 21/2inches 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 33/4inches of the flange.
(f) A flange worn to a7/8inch thickness or less, gauged at a point3/8inch above the tread.
(g) A tread worn hollow5/16inch or more on a locomotive in road service or3/8inch or more on a locomotive in switching service.
(h) A flange height of 11/2inches or more measured from tread to the top of the flange.
(i) Tires less than 11/2inches thick.
(j) Rims less than 1 inch thick on a locomotive in road service or less than3/4inch 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.
