Locomotive appliances . ition it not only tails to conveyoil to the journal, but actually becomes in time hard-ened and glazed, the effect of which is to wipe orscrape off any oil that may reach the journal from theforward part of the box. The lubrication, therefore, isso retarded as to, in a short time, result in the heatingof the journal. At the same time that this conditionexists in the back of the box, the appearance of the 298 LOCOMOTIVE APPLIANCES. packing near the front of the box may be very good,and a man that gave attention to the packing justprior to journal heating would be under t
Locomotive appliances . ition it not only tails to conveyoil to the journal, but actually becomes in time hard-ened and glazed, the effect of which is to wipe orscrape off any oil that may reach the journal from theforward part of the box. The lubrication, therefore, isso retarded as to, in a short time, result in the heatingof the journal. At the same time that this conditionexists in the back of the box, the appearance of the 298 LOCOMOTIVE APPLIANCES. packing near the front of the box may be very good,and a man that gave attention to the packing justprior to journal heating would be under the impressionthat the treatment he gave it was all that possiblycould be done. It is, therefore, considered that thetreatment of the packing as demonstrated by themodel box, and also described, is of much greaterimportance than the mere adding of oil to the box. Fig. 1 illustrates a journal box having an excessivequantity of packing, which is not only a wastefulpractice, resulting in a loss of oil out of the ends of the. Fig. Excessive Quantity of Packing. box, but is also detrimental to good results, as by thismethod of so completely filling up the box with pack-ing a condition is caused that frequently results inthreads or small particles of packing becomingcaught between brass and journal. This occurs byviolent shocks produced in switching and applicationof brakes when the relation between brass and jour-nal is sufficiently disturbed to permit small particles ofwaste being caught under the edge of brass andjournal. This is particularly true when the packingis pressed up close around the brass, as in Fig. 4. LOCOMOTIVE APPLIANCES. 299 This is not an infrequent cause of very serious casesof hots driving boxes on engines. The effect is thatthe oil is wiped off the journal and the surface thusbecomes dry, resulting in heating in a comparativelyfew minitues. It is therefore apparent that in stirringup packing, the top portion should be entirely belowthe edge of the bras
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectlocomot, bookyear1901
