222 SCIENCE Of SUCCESSFUL THRESHING 



Before the beginning of each threshing season, the 

 separator should be carefully overhauled, worn cylinder 

 teeth removed and all broken slats in the straw-rack or 

 stacker-rakes replaced. Any boxes that are worn should 

 be taken up or rebabbitted if necessary. The wooden boxes 

 on the straw-rack, conveyor and shoe eccentrics can easily 

 and cheaply be replaced when worn out. All nuts that 

 are loose should be tightened and any bolts that may have 

 been lost, replaced. In tightening a nut it should always 

 be turned square with the piece on which it rests. If this 

 be habitually done, not only does the machine look better, 

 but it serves to make the loosening of a nut apparent. 



Canvas-Cover. If a canvas be used to cover the separa- 

 tor nights and when not running during the threshing 

 season, its better appearance will amply repay the extra 

 trouble and expense, in addition to prolonging its use- 

 fulness. 



In Laying up a Wood Frame Machine see that the 

 bolster is blocked up by bolster-jacks or other means so 

 as to hold the frame square. This is especially necessary 

 if the separator has a side-gear, if the main-belt remains 

 on the reel, or, if for other reasons, one side is heavier 

 than the other. 



Removing the Beater. The beater can be taken out 

 of the machine without removing the shaft or pulley. This 

 may be done on wood- frame machines by removing the 

 pieces of siding and the bolts holding bearings and blocks 

 and lifting the beater straight up. On steel machines the 



