. Locomotive engineering : a practical journal of railway motive power and rolling stock . part of the brassis in contact with the pin. This is wrong,and will give trouble until the brass isworn down to a good bearing again. Thenthe brass may be cut so it reduces thebearing surface, or the pin may be wornout of round and with ridges on it so thatit does not present a good surface to thebrass. Where the brass is uneven and with toosmall a bearing surface on the pin it canbe helped by tinning it over. This willfill up the hollows in the bearing, and as does not look reasonable that (he troublei?
. Locomotive engineering : a practical journal of railway motive power and rolling stock . part of the brassis in contact with the pin. This is wrong,and will give trouble until the brass isworn down to a good bearing again. Thenthe brass may be cut so it reduces thebearing surface, or the pin may be wornout of round and with ridges on it so thatit does not present a good surface to thebrass. Where the brass is uneven and with toosmall a bearing surface on the pin it canbe helped by tinning it over. This willfill up the hollows in the bearing, and as does not look reasonable that (he troublei? all with th;- men in charge. At the same time we are conimcndinga good bearing surface on the brass weoften find a brass that has the strips ofbabbitt in its face melted out and therecesses filled with sole leather or asbestosboard, and run cool. Possibly the mannerin which the strip of leather or asbestoshelps 10 lubricate the pin has something10 do with this good work. The way in which the brasses arc fittedto the pin when they are worn and needreducing has something to do with this. FIG. 26. INTERIOR OF ERECTING SHOP. pounds it is a little over five times asmuch on the pin as on the journal. Do you wonder that they run hot oncein a while? The crank pin, however, has one ad-vantage over the truck jourpal. Thestrain changes from one side of the brassto the other when working, so that whenone side gets all the strain the other sidehas a chance to get a good oiling, readyfor its turn at the work; that is, providedoi enough is used to do this. .\ bearing revolving steadily under sucha load, as is the case with the truckjournal, would squeeze all the oil outfrom between the bearing surfaces and gethot in short order. Another cause for an insuflJicient bear-ing of the brass on the pin may be that it the soft tin on the high spots wears downquickly, it will soon have an even surfaceall over and run cool. The material used for pins and brasseshas something to do with cool runningpin
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroa, bookyear1892
