﻿GET_GEVOMechL2_06_01_01_09 - ANIMATION Screen
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The wheels on a high adhesion truck transfer the torque generated by the traction motor and apply it to the rails.

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They are also designed to keep the locomotive on the rail.

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Periodically inspect the wheels for damage or excessive wear in accordance with Federal Railroad Administration 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 3/32 inch (0.0938 inches or 2.38 mm); this is equivalent to approximately 2-1/2 tapes.”

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The term “tape”, as originally used in measuring locomotive wheels, is the measurement of the circumference of the wheel, where each 1/8<sup>th</sup> of an inch (0.125 inches) equals a number on a steel tape measure.

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In the FRA rule above, the diameter is stated as the actual measurement, while the approximate conversion from “diameter” to “circumference” is also included.

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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.

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Wheels should be turned or replaced if not within the limits listed in the table.


