176 SCIENCE OF SUCCESSFUL THRESHING 



to carry the tailings from the end of the elevator to the 

 cylinder. This spout has an auger on most separators 

 and it is then called the "tailings conveyor." The tailings 

 elevator is driven from the crank-shaft with a crossed 

 belt so that the chain carries the tailings up the lower pipe. 

 The speed of the drive shaft at top is 185 revolutions per 

 minute and the upper and lower sprockets having the same 

 number of teeth, the tailings auger also runs at this speed. 



Oiling Tailings Elevator. The boxes to be oiled on 

 tailings elevator are the two of the shaft at the upper end, 

 the one bolted to "boot" at lower end and its mate, which 

 is at the other end of the auger on opposite side of separa- 

 tor. The tailings conveyor has two bearings for the small 

 cross-shaft and one at each end of auger. These should 

 be frequently oiled and the bevel gears kept greased. 



Adjusting Chain of Tailings Elevator. The boxes at 

 the upper end of the elevator have slotted holes to allow 

 them to be moved for tightening the chain carrying the 

 cups. Set-screws with long threads aid in adjusting the 

 boxes and in holding them in place. The chain should be 

 kept tight enough to prevent it from unhooking, but it 

 should have slack enough to run freely. Unlike the Grain 

 Handlers, one or any number of links may be taken out to 

 shorten it. The short chain driving the tailings conveyor 

 is tightened by lowering the brackets supporting it, the 

 holes in which are slotted for this purpose. 



To Put Chain in Tailings Elevator. Tie a weight to 



