﻿GET_GEVOMechL2_02_01_01_104 - STEP-BY-STEP Screen
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A poorly maintained coalescer or coalescer filter element may cause additional pressure loss through the coalescer system. 

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This could result in an incorrect crankcase pressure and cause the engine to shut down due to crankcase overpressure faults. 

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Typical steps to clean the coalescer and coalescer filter element are as follows: 

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<b>Warning: </b>To prevent personal injury and potential equipment damage, ensure that the engine cannot be started before removing, installing, or adjusting any engine component. 

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Place the BS in the OFF position to prevent starting attempts. 

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Also, place the FPB, LCCB, and BCCB in the OFF position, and apply a warning tag on the EC switch. 

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<b>Warning: </b>If the locomotive is equipped with AESS, the diesel engine may start without operator action. 

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Exercise caution when working around the radiator cab. 

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Ensure that AESS is disabled before performing any maintenance on the locomotive. 

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Failure to do so may result in death or serious personal injury. 

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1. Remove the coalescer as discussed in the Coalescer Removal section of this module. 

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<b>Note: </b>The inside of the coalescer, the hoses, and the filter element may have a dirty engine oil coating. 

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2. Remove the clamp securing the top and bottom halves of the coalescer, then separate the top and bottom halves by rotating and pulling up on the top half of the coalescer, with the bottom half supported. 

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3. Remove the filter element from the coalescer shell and the sealing ring from the bottom half of the coalescer. 

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4. Clean the filter element and the coalescer halves with an approved solvent to remove the oil residue and contaminants that may have built up in or on them.
