﻿GET_GEVOMechL2_02_01_01_113 - ANIMATION Screen
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You have reached the end of this module! 

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In this module, you learned to: 

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State the purpose and location of the lubricating oil system.

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The lubricating oil system, commonly referred to as the lube oil system, provides pressurized lubrication to engine components and carries away heat produced by friction and combustion.

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The lube oil system components are located along the engine and the radiator cabs.

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State the purpose and location of the major components of the lubricating oil system.

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The diesel engine pan is located on the underside of the engine. 

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The oil pan is bolted to the diesel engine mainframe and forms the reservoir that holds the lubricating oil.

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The lubricating oil pump is located on the IFE cover of the engine and circulates the oil through the lubricating oil system.

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The lubricating oil cooler is located in the radiator cab on the helper’s side (B-side) of the locomotive just aft of the engine. 

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It removes heat from the lubricating oil system.

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The lubricating oil filter is located in the radiator cab on the helper’s side (B-side) of the locomotive just aft of the engine and oil cooler. 

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It removes contaminants larger than 30 microns.

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The pre-lube oil pump is located in the radiator cab on the engineer’s side (A-side) of the locomotive just aft of the engine. 

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It pre-lubricates the engine before cranking.

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The check valve is located in the engine cab on the helper’s side (B-side) of the locomotive. 

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It protects the pre-lube pump from excessive reverse oil flow (backflow) from the outlet to the inlet when the pump is not operating.

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The coalescer is mounted to the IFE cover of the diesel engine and is accessible from the engineer’s side (A-side) of the locomotive. 

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It removes combustible gases from the engine crankcase.

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State the purpose and location of the instrumentation devices of the lubricating oil system.

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The Engine Lube Out Temperature (ELOT) sensor is located in the oil discharge pipe from the lubricating oil pump. 

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It measures the temperature of the lubricating oil exiting the engine and provides the information to the ECU.

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The Engine Lube In Temperature (ELIT) sensor is located in the IFE cover next to the oil inlet pipe to the engine. 

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It measures the temperature of the lubricating oil entering the engine and provides the information to the ECU.

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The Engine Lube In Pressure (ELIP) sensor is located on the rear of the engine crankcase just behind the left-six power assembly. 

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It measures the pressure of the lubricating oil at the left-seven cam bearing in the engine and provides the information to the ECU.

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The Engine Lube Pump Pressure (ELPP) sensor is located in the oil discharge pipe from the lubricating oil pump. 

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It measures the pressure of the lubricating oil at the outlet of the lubricating oil pump and provides the information to the ECU.

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The Crankcase Overpressure (COP) sensor is located on the rear of the engine crankcase just behind the left-six power assembly. 

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It measures the pressure in the crankcase and provides the information to the ECU.

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Describe how the lubricating oil system operates.

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Oil is drawn from the engine oil pan through a perforated metal strainer by the lubricating oil pump.

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The pump forces the oil through the oil cooler. 

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The cooled oil flows out of the oil cooler to the oil filter housing.

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From the oil filter housing, the oil is piped to the IFE cover of the engine. 

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From the IFE cover, the pressurized oil is distributed to the turbocharger and the moving parts of the engine. 

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The oil cools and lubricates the moving parts and then returns to the oil pan.

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The pre-lube pump operates prior to engine cranking to circulate lubricating oil through the engine and is critical to engine protection.

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The lubricating oil is pulled by the pre-lube pump from a take-off in the engine oil suction pipe.

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From the pre-lube pump, the oil is sent to the engine through the check valve. 

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The lubricating oil passes through the oil cooler and oil filter before being sent into the engine.

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The coalescer collects oil mist from the crankcase gases. 

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The collected oil is returned to the crankcase, and the gases are vented to the atmosphere through the exhaust stack.
