. Locomotive engineering : a practical journal of railway motive power and rolling stock . rewed into thestrap or rod, remember that if too muchforce is used when screwing the cup onthe strap or the cover on the cup, that itwill twist the screw plug at the bottom oftlie cup. This will change the shape ofthe hole through this plug so the feeder to a plunger feeder and make it stick,where a larger particle would not workdown. A short thread of waste can windaround a needle feeder at the point andstop the oil from passing down, so thebearing will get hot. When you take offthe cover, the guilty th
. Locomotive engineering : a practical journal of railway motive power and rolling stock . rewed into thestrap or rod, remember that if too muchforce is used when screwing the cup onthe strap or the cover on the cup, that itwill twist the screw plug at the bottom oftlie cup. This will change the shape ofthe hole through this plug so the feeder to a plunger feeder and make it stick,where a larger particle would not workdown. A short thread of waste can windaround a needle feeder at the point andstop the oil from passing down, so thebearing will get hot. When you take offthe cover, the guilty thread will drop oflEsomewhere, maybe down into the cup, andbe ready for another stoppage. A good many crank pins are lubricatedwith a thick grease, fed through a cupmade specially for the purpose. Most ofthem run a little warm at. all times, so thegrease will feed around the bearing; butwhat little grease does feed down stays onthe bearing, and is not thrown out by thecentrifugal force at high speeds. Thistakes less of the lubricant, and does not 3o6 ENGINEERING July, i8i) FIG. 28. VIEW OF THE NARROW GAGE IN THE WORKS. allow dirt to work in at the collars of thepin next the brass, as the thick grease in amanner covers this opening. A very little oil, if it stays on the bear-ing, will do the work; but it should be ofa proper consistency, so it will feed downat all times. Valve oil used where thetemperature changes from hot to cold, issure to cause hot pins. It will not feeddown when cold till too late to preventdamage. Why does a thick grease work underthose conditions, you ask? Because it is used in a special cup, whichforces a supply down on the pin. and itstays there till used up while oil is ex-pected to feed down as a fluid. A changeof temperature changes the rate of feed;so that on a hot day the oil splashes allover; the next day it may not feed enouglifor running cool, and the pin is hot before the oil in the cup gets thin. Look out fortliis with th
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroa, bookyear1892
