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The combustion process of a diesel engine produces exhaust products such as smoke (visible), hydrocarbons and oxides of nitrogen (invisible). The dark smoke emitted by a diesel engine is soot or carbon particles and even in low concentration make the diesel exhaust highly visible and offensive to most people. Every effort must be made to eliminate smoke even though it can be considered more of a nuisance than a pollutant.Under certain conditions oxides of nitrogen react with certain hydrocarbons to form smog which can become irritating and toxic if large concentrations accumulate. Concentrations of this pollutant combined with pollution of other sources all contribute to the total air quality problem.As an engine manufacturer, our goal is to see that environmental standards are met with a minimum additional complexity or cost to the product. Throughout the years, continuing research and design improvements have been directed at minimizing exhaust emissions. Caterpillar has incorporated items such as -TURBOCHARGING: Reduces exhaust noise and provides more air per cylinder allowing the fuel to burn more efficiently. These engines are integrally designed for turbocharging.AIR-FUEL RATIO CONTROL FOR TURBOCHARGED ENGINES: Limits the amount of fuel during acceleration to minimize smoke levels.RECOMMEND FUELS, LUBRICATING OILS AND MAINTENANCE SCHEDULES: To assure minimum exhaust emissions.Maintenance Recommendations
Caterpillar Truck Engines are certified by the United States Environmental Protection Agency to comply with smoke emission standard limits prescribed by Federal laws at the time of manufacture.Efficiency of emission control and good engine performance depend on adherence to proper operation and maintenance recommendations, use of recommended fuels and lubricating oils. It is recommended that major adjustments and repair be entrusted to your authorized dealer.Various chemical fuel additives are commercially available that claim to reduce visible smoke. Although additives have been used by individuals to solve some isolated smoke problems in the field, they are not recommended for general use. Federal smoke regulations require the certification of engines without a smoke depressant.The corrective steps taken immediately on discovery of worn parts, which may affect emission levels, will help assure proper operation of emission control systems. The use of genuine Caterpillar parts is recommended. Suppliers of non-Caterpillar parts must assure the user that the use of such parts will not adversely affect emission levels.Regular service intervals along with special emphasis on the following items are necessary to keep exhaust emissions within acceptable limits for the useful life of the engine. Refer to the Lubrication and Maintenance Section of this Operation Guide for details and maintenance schedule. If the engine is operating under severe conditions, adjust maintenance schedule accordingly. See your authorized dealer to help analyze your specific maintenance schedule.The following explanation of required emission related component maintenance has been keyed by number to correspond with item number in the maintenance chart.1. COOLANT - LEVEL AND PROTECTION: Check the engine coolant level daily with the engine stopped and cool. Release cooling system pressure before checking. Fill to proper level with permanent-type antifreeze and water as free as possible from scale forming minerals. DO NOT USE