﻿GET_GEVOMechL2_01_01_01_27 - ANIMATION Screen
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Each type of locomotive has its own documentation where you can find torque data and the many ways that our engineering group specifies torque values.

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Each Running Maintenance and Backshop Manual publication has a Data or Torque Values section located at the back.

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The torque value for a particular application is listed as part of the procedural step.

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There are two ways in which torque values are specified: Pre-torque vs. Final Torque, and Range of Torque Values.

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Some fasteners have a pre-torque and a final torque value.

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The reason for this is to minimize the variations caused by friction between fasteners.

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What this means is that all fasteners are first torqued to the pre-torque value and then to the final torque value.

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Pre-torque and final torque values are indicated by separating them with a "/".

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For example, for the crankshaft drive gear bolt values 300/970 Nm, the first number is the pre-torque value and the second number is the final torque value.

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A fastener can have a higher specified pre-torque value than a final torque value.

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Always torque the fastener to the values specified in the maintenance manual.

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Our engineering group indicates a Range of Torque Values in two ways: by using a range of values, and a plus-or-minus value.

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For example, in 50 to 60 lb.-ft. (commonly read as ft.-lb.), any torque value of 50 through 60 lb.-ft. is valid.

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For 90 plus or minus 9 lb.-ft., a valid torque is 81 through 99 lb.-ft.
