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Page 2 <br /> CONTAMINATED BAGS <br /> 3.0 The word "contaminated" is being used to describe a dust bag that has become <br /> coated with a material outside the normal material the collector is collecting. <br /> 3.1 The usual materials that contaminate a dust bag are water, oil, or grease. <br /> 3.1.1 A very small amount of either water, oil, or grease will contaminate all of the bags <br /> in the dust collector. This results in a complete change of dust bags. <br /> 3.2 Cleaning Contaminated Dust Bags: <br /> There is no satisfactory method of cleaning contaminated bags. <br /> 3.3 Recognizing Contaminated Bags: <br /> 3.3.1 Generally, the first sign is to observe that the amount of air passing through the dust <br /> collector is less than it should be. <br /> 3.3.2 Remove panels to bag house and check dust bags. (See page 6 for dust bag <br /> assembly.) <br /> 3.3.3 Rub a dust bag with your thumb and forefinger. If the residue left on your thumb or <br /> forefinger will not brush off readily, the bags are either wet, oily, or some of each. <br /> 3.4 Cleaning Contaminated Filter Bags: <br /> Brushing or vacuuming is the only method that may restore contaminated dust bags <br /> to usable dust bags. <br />