﻿GET_GEVOMechL2_03_01_01_95 - ANIMATION Screen
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Describe the protection strategies used with the split cooling water system.

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Low Water Pressure Protection: The Engine Management System (EMS) software uses water pressure information (as read by the EWIP sensor) to prevent damage to the engine caused by a low water pressure condition.

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Low Water Pressure Thresholds: This strategy prevents damage to the engine when the water pressure drops below the specified threshold value for each engine notch speed.

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Cold Engine Protection: When the engine is cold, engine speed is limited as a function of lubricating oil outlet temperature (as read by the ELOT sensor).

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This prevents damage to the engine, lube oil pump, and external oil piping.

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Hot Water Protection: When the engine inlet water (as read by the EWIT sensor) is hot, the available horsepower from the engine is reduced to protect the engine from damage.

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At the same time, the engine speed increases to 1050 RPM to provide the highest radiator fan speed and maximum cooling.

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Cannot Cool Protection: If the radiator fan is unable to run, the engine is limited to Notch 2, thereby protecting the engine from overheating.

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Engine Water Inlet Temperature and Engine Lube Oil Outlet Temperature ΔT Protection: The engine horsepower derates or shuts down if the delta temperature (ΔT) between the engine water inlet (as read by the EWIT sensor) and the engine lube oil outlet (as read by the ELOT sensor) exceeds an allowable limit.

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Loss of Both Engine Water Temperature Sensors Protection: If both engine oil temperature sensors (ELIT and ELOT) are bad, the engine shuts down.

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Describe the running maintenance required for the split cooling water system.

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Split Cooling Water System: Visually inspect the engine, water pump, oil cooler, water-based intercooler, fuel manifold, univalve, radiators, and all system piping for water leaks and correct as needed.

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Cooling Water: Check the cooling water level after the engine has been idling for at least ten minutes with the green LED on.

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Radiators: Clean as necessary.

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Run the radiator fan backwards to clean debris from screens every 184 days.

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Univalve: Inspect for any water leakage.

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Run Self-Test 320 and observe that the univalve switches correctly for each mode of operation every 184 days.

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Water-Based Intercooler: Every 184 days, inspect for any water (or oil) leakage at the weep holes at each end of the intercooler and check the two weep holes in the engine IFE cover.

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Radiator Fan: Lubricate the bearings every year.

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Clean radiator fan blades and closely inspect the blades for cracks every two years.

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If any cracks are found, replace the radiator fan.

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Victaulic Coupling: No routine running maintenance on the piping system is required.


