196 SCIENCE OF SUCCESSFUL THRESHING. 



with water, clean the oil holes carefully, oil liberally and if it 

 gets hot again, stop and remove the cap, clean the bearing 

 carefully and be sure the oil holes and grooves are open be- 

 fore replacing it. Also be careful to leave the paper liners 

 undisturbed. If the babbitt has adhered to the shaft, because 

 of overheating, scrape every particle of it from the shaft with 

 a knife. If the journal has been cut and is consequently 

 rough because of the formation of ridges, smooth it carefully 

 with a fine file and wipe it thoroughly so that no 'filings re- 

 main. Oil it well before replacing cap. Because of the ex- 

 pansion due to heating, it sometimes happens that a shaft 

 that is cutting becomes fast in its box so that it will not turn. 

 If the box be in one piece so there is no cap to remove, after 

 cooling with water, kerosene may be applied to loosen it. In 

 very windy weather the right cylinder box requires especial 

 attention as the constant swaying of the main-belt causes an 

 extra amount of friction on this bearing. 



Greasing the Trucks. This book would be incomplete 

 without a word of warning concerning the damage, fre- 

 quently caused by neglect, to the skeins and hubs of the 

 trucks of an outfit. To make the lubrication of truck-wheels 

 convenient, in some cases, the hubs are provided with oil- 

 holes which are closed with plugs. It has been found, how- 

 ever, that this means of lubricating cannot be relied upon, as 

 the holes are sure to become clogged, and unless great care 

 is taken in cleaning them, very little or no oil will reach that 

 part of the axle which needs it most. All truck-wheels 



