DIESEL FUELS & DIESEL FUEL SYSTEMS

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Diesel Fuels & Diesel Fuel SystemsApplication and Installation Guide• Filter or centrifuge used oilbefore putting it in the fueltanks to prevent prematurefuel filter plugging,accelerated wear, or pluggingof fuel system parts. Soot,dirt, metal, and residueparticles larger than 5 microns(0.000197 in.) should beremoved by this process. Iffiltering or centrifuging is notused before adding the oil tothe fuel, primary filters with 5microns (0.000197 in.)capability must be locatedbetween the fuel supply andengine. These will requirefrequent servicing.• Clean handling techniques ofthe used crankcase oils areessential to preventintroducing contaminants fromoutside sources into the dieselfuel supply. Care must betaken in collecting, storingand transporting the usedcrankcase oil to the diesel fueltanks. Diesel fuel day tanksight glasses may becomeblackened in time due to thecarbon content in thecrankcase oil. Ash content ofthe lube oil added to the fuelmay also cause accumulationof turbocharger and valvedeposits more rapidly thannormal.Continuous BlendingIf the installation warrants, usedlubricating oil can be blended andused in the engine in a continuousmanner. The normal method uses acentrifuge module similar to Figure9. The following informationdescribes this system.Centrifuge No. 1Engine crankcase oil iscontinuously centrifuged exceptwhen the clean waste oil tank islow, at which time the dirty wasteoil is centrifuged and directed to theclean waste oil tank.Centrifuge No. 2Distillate fuel/oil mixture daytank iscontinually centrifuged.Metering PumpAdds up to 5% clean waste oil tothe distillate fuel (from the mainsupply tank) when the daytank lowlevel switch calls for more fuel.Static MixerRuns when the metering pump ison to insure a proper homogeneousmixture of the fuel and clean wasteoil.The centrifuge module iselectronically controlled and includesthe components within the dottedline as shown in Figure 10. Size thesystem for appropriate fuel delivery.Page 34©2005 Caterpillar®All rights reserved.
Application and Installation GuideDiesel Fuels & Diesel Fuel SystemsFigure 10©2005 Caterpillar®All rights reserved. Page 35
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DIESEL FUELS & DIESEL FUEL SYSTEMS

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