. Locomotive engineering : a practical journal of railway motive power and rolling stock . lateral motion or spring out of sbai)cto meet the new lines. Crank pins that are sprung will ehot bearings. Soinetimcs you will noticethat they wear at alternate ends on op-(ibtft^ jiides of the same pin; have themlested before the trouble begins to you tliink a crank pin i^ out of round,have it carefully calii)cred. A crosshead pin that is out of rounddoes not give as much trouble as a defec-tive crank pin. will not move up and d .wn freely and dothe work we expect of il. (Jne of tlie gnat
. Locomotive engineering : a practical journal of railway motive power and rolling stock . lateral motion or spring out of sbai)cto meet the new lines. Crank pins that are sprung will ehot bearings. Soinetimcs you will noticethat they wear at alternate ends on op-(ibtft^ jiides of the same pin; have themlested before the trouble begins to you tliink a crank pin i^ out of round,have it carefully calii)cred. A crosshead pin that is out of rounddoes not give as much trouble as a defec-tive crank pin. will not move up and d .wn freely and dothe work we expect of il. (Jne of tlie gnat advantages of an oilcup that is forged solid on a rod or strapis that the shape of the hole docs notchange, except with wear, as the cup isiron or something as hard and has a longbearing. A plunger will not wear it outof truth as quickly as in a bra-s cup, andthey dont come unscrewed or break can screw the cover down tight with-out twisting the cup off. Strain your oil, and be careful and usenothing but clean material for very small particle of grit will get next. you will liave a certain mark to key up a forked end rod this cannot bedone. Any main rod should have a little lat-eral motion at each end, at every point ofthe revolution of the wheel. To try this,pinch the engine over to different pointsor try her outside the house before coup-ling on the train, and see that it is notbinding anywhere. If the crosshead pinor brasses are the least bit out of truthand keyed up tight, it will affect the workof the crank pin end very seriously. Thereshould be sufficient lateral motion at thecrosshead end to allow the other end torun freely and without binding at anypoint in the revolution. When the engine is rocking around on FIG. 27. A B.\Y OF THE M.\CHINE SHOP. Each time you fill the rod cups or startout on a trip, unless you know they havebeen examined, see that they are in goodorder. If of the plunger type, lift themup and turn them around so as to be su
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroa, bookyear1892
