﻿GET_GEVOMechL2_07_01_01_29 - ANIMATION Screen
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The wheels on the steerable truck transfer the torque generated by the traction motor and apply it to the rails.

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The wheels are designed to keep the locomotive on the rails.

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<b>Caution: </b>Shimming of truck springs to correct for differences in wheel diameters is not recommended on the steerable trucks.

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Shimming reduces spring travel and causes unbalanced spring loading conditions.

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Unbalanced loading conditions will shorten the life of other load-supporting components.

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Periodically inspect the wheels for damage or excessive wear in accordance with Federal Railroad Administration (FRA) Regulations.

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The FRA rule for wheel inspection states, "The diameter of the wheels on the same axle shall not vary more than 0.0938 inches (2.38 mm); this is equivalent to approximately 2-1/2 tapes."

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<b>Note: </b>The term “tape”, as originally used in measuring locomotive wheels, is the measurement of the circumference of the wheel, where each one-eighth of an inch equals a specific number on a steel tape measure.

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The “tape” measurement is provided because it is easier to measure the circumference than the diameter due to the axle and bearing being located in the center of the wheel.
