Federal Railroad Administration, DOT § 230.115

less than 6 inches wide for standard tires applied to driving and trailing gage and no less than 51⁄2 inches wide . When a single tire is applied, for narrow gage. the diameter must not vary more than 3⁄32 inch from that of the opposite § 230.113 Wheels and tire defects. on the same . When a single pair of Steam and tender wheels tires is applied the diameter must be or tires developing any of the defects within 3⁄32 inch of the average diameter listed in this section shall be removed of the wheels in the base from service immediately and repaired. to which they are applied. Except as provided in § 230.114, welding on wheels and tires is prohibited. A § 230.114 Wheel centers. wheel that has been welded is a welded (a) Filling blocks and shims. Driving wheel for the life of the wheel. and trailing wheel centers with divided (a) Cracks or breaks. Wheels and tires rims shall be properly fitted with iron may not have a crack or break in the or steel filling blocks before the tires flange, tread, rim, plate, hub or brack- are applied, and such filling blocks ets. shall be properly maintained. When (b) Flat spots. Wheels and tires may shims are inserted between the tire and not have a single flat spot that is 21⁄2 the wheel center, not more than two inches or more in length, or two ad- thicknesses of shims may be used, one joining spots that are each two or more of which must extend entirely around inches in length. the wheel. The shim which extends en- (c) Chipped flange. Wheels and tires tirely around the wheel may be in may not have a gouge or chip in the three or four pieces, providing they do flange that is more than 11⁄2 inches in not lap. length and 1⁄2 inch in width. (b) Wheel center condemning defects. (d) Broken rims. Wheels and tires may Wheel centers with any of the fol- not have a circumferentially broken lowing defects shall be removed from rim if the tread, measured from the service immediately and repaired: flange at a point 5⁄8 inch above the (1) Wheels centers loose on axle; tread, is less than 33⁄4 inches in width. (2) Broken or defective tire fas- (e) Shelled-out spots. Wheels and tires tenings; may not have a shelled-out spot 21⁄2 (3) Broken or cracked hubs, plates, inches or more in length, or two ad- bolts or spokes, except as provided in joining spots that are each two or more paragraph (b)(4) of this section; or inches in length, or so numerous as to (4) Driving or trailing wheel center endanger the safety of the wheel. with three adjacent spokes or 25 per- (f) Seams. Wheels and tires may not cent or more of the spokes in the wheel have a seam running lengthwise that is broken. within 33⁄4 inches of the flange. (c) Wheel center repairs. Wheel centers (g) Worn flanges. Wheels and tires may be repaired by welding or brazing may not have a flange worn to a 15⁄16 provided that the defect can properly inch thickness or less, as measured at be so repaired and, following the re- a point 3⁄8 inch above the tread. pair, the crankpin and axle shall re- (h) Worn treads. Wheels and tires may main tight in the wheel. Banding of the not have a tread worn hollow 5⁄16 inch hub is permitted. or more. (d) Counterbalance maintenance. Wheel (i) Flange height. Wheels and tires counterbalances shall be maintained in may not have a flange height of less a safe and suitable condition for serv- than 1 inch nor more than 11⁄2 inches, ice. as measured from the tread to the top of the flange. TANKS (j) Rim thickness. Wheels may not have rims less than 1 inch thick. § 230.115 Feed water tanks. (k) Wheel diameter. Wheels may not (a) General provisions. Tanks shall be have wheel diameter variance, for maintained free from leaks, and in safe wheels on the same axle or in the same and suitable condition for service. driving wheel base, greater than 3⁄32 Suitable screens must be provided for inch, when all tires are turned or new tank wells or tank hose and shall be

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