﻿GET_GEVOMechL2_04_01_01_08 - ANIMATION Screen
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Under normal operating conditions, the fuel transfer pump provides an output flow rate of 12.75 GPM at Low Idle engine speed.

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<b>Note:</b> The fuel transfer pump contains an internal pressure relief valve, which protects the pump if the output pressure exceeds 130 psi.

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For example, if the fuel filter elements become dirty or clogged, the pressure at the pump outlet rises.

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When the pressure exceeds 130 psi, the relief valve opens and diverts approximately 4.75 to 8.75 GPM of fuel back to the tank.

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From the fuel transfer pump outlet, the low-pressure fuel is sent to the fuel manifold.

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The manifold contains a fuel heater and a thermostatic mixing valve.

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The fuel first flows through the fuel heater, which uses water from the split cooling water system to heat the fuel.

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This is necessary because the cold diesel fuel tends to wax and become thick and slushy.

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The thermostatic mixing valve regulates the outlet fuel temperature.

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The thermostatic valve is normally open, and the fuel flows from the fuel heater through the valve until the main flow temperature reaches 75°F.

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At this point, the valve starts to close, causing cold fuel from the fuel tank to mix with the warmer fuel from the fuel heater.

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When the fuel temperature reaches 85°F to 87°F, the valve closes fully, and the fuel flow bypasses the fuel heater.

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From the fuel manifold, the fuel flows to the fuel filter assembly.

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The fuel filter assembly consists of two tanks, or canisters, and each tank contains a three-piece filter element.

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The filter elements remove contaminants larger than 5 microns from the fuel.

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From the fuel filter assembly, the fuel flows to each of the 12 high-pressure pumps on the engine by means of a circular low-pressure supply header.

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The supply header ensures that the fuel is equally distributed to each high-pressure pump.


