﻿GET_GEVOMechL2_10_01_01_44 - 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 equipment cooling air system.

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The primary purpose of the equipment cooling air system is to provide cooling air for critical components, including the alternator, the propulsion circuits, and the traction motors.

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A secondary purpose is to pressurize key areas of the locomotive to help keep out contamination.

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The equipment cooling air system contains two separate forced-air ventilation subsystems: the traction motor cooling air system and the alternator and auxiliary cooling air system.

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The major components of the traction motor cooling air system are located in the radiator cab.

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The major components of the alternator and auxiliary cooling air system are located in the blower cab.

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State the purpose and location of the major components of the equipment cooling air system.

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The purpose and location of the major components of the traction motor cooling air system are as follows:

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V-Screens: Located on both sides of the radiator cab, the V-screens provide the entry point for the air-to-traction motor cooling air system while blocking debris.

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Plastic Air Cleaner Panels: Located directly behind the V-screens in the radiator cab, the plastic air cleaner panels, also referred to as spin cleaner panels, clean the air entering the traction motor cooling air system.

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Vortex tubes in the spin cleaner panels contain spiral vanes that cause the air to swirl like a tornado as it passes through the tube.

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The swirling action forces heavier dirt particles to the outside of the air stream.

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This "dirty" air is separated at the output of the tubes and discharged from the air cleaner panels into a bleed air duct.

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Traction Motor Blower: Located in the radiator cab on the Helper's side, the traction motor blower or the equipment blower provides cooling air for all the traction motors on the locomotive.

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Exhauster Blower: Located in the radiator cab on the Engineer’s side of the locomotive, the exhauster blower removes the dirty air from the spin cleaner panel bleed air duct, continuously discharging the bleed air and dirt out the top of the unit and into the radiator cab.

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From the radiator cab, the radiator fans pull the air out, discharging the dirty air through the top of the locomotive.

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The purpose and location of the major components of the alternator and auxiliary cooling air system are as follows:

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V-Screens: Located on both sides of the blower cab, the V-screens provide the entry point for the air to the alternator and auxiliary cooling air system while blocking debris.

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Plastic Air Cleaner Panels: Located directly behind the V-screens in the blower cab, the plastic air cleaner panels clean the air entering the alternator and auxiliary cooling air system.

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Vortex tubes in the spin cleaner panels force heavier dirt particles to the outside of the air stream.

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This "dirty" air is separated at the output of the tubes and discharged from the air cleaner panels into a bleed air duct.

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Alternator Blower with Exhauster: Located in the blower cab, the alternator blower provides cooling air to the alternator and to the equipment in the auxiliary cab, CA1, and CA8.

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The exhauster portion of the alternator blower draws the dirty air from the spin cleaner panel bleed air duct and exhausts the air to the roof of the blower cab.

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Auxiliary Cab Air Filters: Located in a compartment directly above the alternator on the Helper’s side of the locomotive, the auxiliary cab air filters filter contaminants from the air that cools the equipment in the auxiliary cab.

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Corner Duct: Located on the Helper’s side of the locomotive and attached to the auxiliary cab, the corner air duct forms a conduit for the cooling air flowing in and out of CA3 in the auxiliary cab.

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State the purpose and location of the instrumentation devices of the equipment cooling air system.

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Barometric Air Pressure (BAP) Sensor: Located on the wall of CA4 in the auxiliary cab, the BAP sensor measures the pressure of the atmosphere and provides the pressure information to the ECU.

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Ambient Temperature (AT) Sensor: Located in CA3, the AT sensor measures the temperature of the air flowing through CA3 and provides this information to the Smart Displays by way of the CIO panel.

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Describe how the equipment cooling air system operates.

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Air flows through the following path in the traction motor cooling air system:

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The vacuum created by the traction motor blower first draws outside air in through the V-screens, where large items are blocked from entering the system.

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Passing through the V-screens, the air and dirt are separated by 12 plastic air cleaner panels.

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An exhauster blower provides a drawing force to discharge the dirty air from the plastic air cleaner panels into the radiator cab.

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The clean air in the middle of the air stream exits each tube and enters the traction motor blower.

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The traction motor blower forces the clean, cooled air into an air plenum.

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The cooling air exits the platform air plenum through flexible air ducts and cools the traction motors.

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After cooling the traction motors, the air exhausts to the atmosphere through vents built into one end of each traction motor.

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Air flows through the following path in the alternator and auxiliary cooling air system:

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The alternator blower draws air into the blower cab through two V-screens and then through six plastic air cleaner panels.

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The clean air passes through the panels to the alternator blower, and dirty air is sent to the exhauster blower, which is physically mounted on a common shaft with the alternator blower.

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The exhauster blower draws in the dirty air from the air cleaner panels and ejects it through the roof of the blower cab.

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The alternator blower receives the clean air and forces it down two paths.

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The first path is through a corner duct to the main propulsion system electrical components located in the aux cab.

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The air then flows back through another channel in the corner duct to the alternator and cools it.

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The air exits one end of the alternator into the engine cab.

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As long as the engine cab doors are closed, the air pressurizes the area and helps keep contaminants out.

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In the second path, air passes to the aux cab through the six auxiliary cab air filters.

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The filtered air is sent in two directions in the aux cab.

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One direction is into CA1, and the other is through the electronic panels in the aux cab.

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The air cools the electronic panels and then flows into the aux cab and CA8.

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This pressurizes the two areas to help keep contaminants out.

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In addition to discharging dirty air, the exhauster blower draws air from the top of CA1 and the toilet compartment and exhausts it through the roof of the blower.



Describe how to perform running maintenance related to the equipment cooling air system.



The air cleaner panels require no routine running maintenance other than a visual inspection to see if they are intact and free of debris.



Every 3 years, lubricate the bearings of the traction motor blower, the exhauster blower, and the alternator blower.



At 184 days, replace the six auxiliary cab air filters.
