SCIENCE OF THRESHING. 1 7 



i 



place on edge by driving spikes on either side of 



them. The cylinder will adjust itself by turning on 

 the straight edges, the heavier side going down. 

 Wedges or pieces of iron of the right weight should 

 be driven in between the band and head on the light 

 side of the cylinder to cause it to balance or remain 

 without turning in any position in which it may be 

 placed. 



If cylinders are properly balanced when they come 

 from the shop, this method will usually put them in 

 good running order. However, a cylinder may seem 

 to be in good balance when on the straight edges, 

 and not so when in motion in the machine, the cause 

 being that one end is heavy on one side while the 

 other end is heavy on the opposite side. In such 

 event, the cylinder should be run rapidly in loose 

 boxes, and while in motion a piece of chalk should 

 be held steadily near enough the shaft at the journal 

 to mark it slightly. The chalk will strike and mark 

 the heavy side, and the balancing piece should be 

 inserted as before, both ends being correspondingly 

 trued. 



A cylinder is sometimes thrown out of balance by 

 putting in some new teeth irregularly around the 

 cylinder, leaving part of the old ones in. In this 

 case, the remedy is to replace all the old teeth, when 

 much worn, by new ones, thereby redistributing the 

 weight in an even manner. 



It will aid the cylinder greatly to work freely and 

 easily if the separator stands still on its trucks while 

 in operation. 



