﻿GET_GEVOMechL2_09_01_01_33 - STEP-BY-STEP Screen
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Typical steps to prepare the engine on the locomotive platform for alternator installation, are as follows:

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1. Ensure the engine is mounted on the platform with its rear end supported on blocks.

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<b>Note:</b> The large rectangular bar bolted to the end of the crankshaft may be left applied.

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Doing so will not affect crankshaft balance.

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<b>Note:</b> If loose, the engine-to-alternator top flange alignment dowel pins should be reinstalled with Loctite<sup>®</sup> 222 applied to the threads.

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<b>Note:</b> Dirty engine-alternator mating surfaces can hinder proper alignment.

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<b>Note:</b> Threaded insert repair is allowed for a maximum of 2 of the 30 alternator rotor bolt holes so long as those 2 bolt holes are not adjacent.

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<b>Caution:</b> Avoid using a wire wheel grinder to clean surfaces.

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Using one can be unsafe as the strands of wire may break free during high speed rotation.

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Also, strands of wire entering the alternator winding have the potential for creating circuit defects.

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2. Using an aluminum oxide flap wheel of not greater than 120 grit, polish and clean the engine coupling and mounting surfaces.

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<b>Caution:</b> When using a grinder to remove burrs or raised metal, limit the area being ground to the defect itself.

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Grinding large portions of the pad surface may change the precision reference plane to which all four pads have been machined.

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3. After polishing, with an ungloved hand, feel the four mounting pads and crankshaft flange face for nicks, raised metal, and burrs and remove any high spots with a file or light grinder.

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<b>Caution:</b> Potential damage of the bottom mounting pad surfaces from shipping chains requires close inspection.

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Residual burrs and metal will create problems when attempting to align the alternator to the engine.

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4. Use compressed air to blow surfaces and bolt holes free of debris.