Title 49: Transportation
PART 229—RAILROAD LOCOMOTIVE SAFETY STANDARDS
Subpart C—Safety Requirements
Suspension System
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§ 229.63 Lateral motion.
(a) Except as provided in paragraph (b), the total uncontrolled lateral motion between the hubs of the wheels and boxes, between boxes and pedestals or both, on any pair of wheels may not exceed 1 inch on non-powered axles and friction bearing powered axles, or3/4inch on all other powered axles.
(b) The total uncontrolled lateral motion may not exceed 11/4inches on the center axle of three-axle trucks.
