Diesel Fuels & Diesel Fuel Systems
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The main and auxiliary filter systems allow changing either the main or auxiliary filter elements with the engine running under load. Generally, the same elements are used in both systems, and are capable of providing adequate filtration for at least 100 hours full load running time with reasonably clean fuel and oil. Use pressure gauges to determine when filters must be changed. Avoid mounting filters near the radiator fan, because a fuel or oil leak during replacement could create a fire hazard. (As either substance passes through the fan it can be atomized, and therefore easier to ignite.) Plus, coated radiator fins trap dirt which can diminish cooling capability.
Water Separation Water in the diesel fuel is absolutely unwanted as it will cause damage to the engine and its components. Water appears in the fuel because of condensation, handling and environmental conditions. Environmental conditions relate to the humidity of some climates. Water in the fuel will be more prevalent in humid climates. Water can impact the fuel system in the following ways.
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Application and Installation Guide
If water appears in the injection system, the fuel will not be able to lubricate as it is supposed to and it will lead to early wear. • Water together with diesel fuel will form microbiological growth which will build up sludge. Sludge will cause wear of the filter system and influence the injection performance. • Iron will oxidize when in contact with water and can infiltrate the fuel. The iron oxide will cause injector wear. Engines using high injection pressure fuel pumps must be protected from water and sediment in the fuel. It is extremely important to maintain water and sediment levels at or below 0.1%. •
Note: Water and sediment collecting in fuel tanks may give the appearance that poor quality fuel was delivered to the site. Several methods can be used to remove excess water and sediment from the fuel system: •
A water and sediment separator can be installed in the supply line ahead of the transfer pump. The separator must be sized to the handle the fuel being consumed by the engine as well as fuel being returned to the tank.
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