152 THE OLIVER PLOW BOOK 



If the plow bottom has a tendency to pull down on 

 the point so as to bear heavily on the land wheel and 

 lightly on the furrow wheels, the share is bent upward 

 too much on the wing. To remedy this the wing of the 

 share must be lowered. 



If the plow has a tendency to bear down heavily on the 

 furrow wheels and not on the land wheel, there is too 

 much dip or suck in the wing of the share. This must 

 be rectified by raising the cutting edge of the wing. 



The length of time that the bearings and axles of 

 wheel plows wear, providing they are kept properly 

 greased, is largely determined by the correct adjust- 

 ment of the plow bottom. For this reason, as well as 

 that of good plowing, plow shares should be kept sharp 

 and adjusted correctly. 



These are delicate operations and a competent smith 

 or plowman should be consulted if the operator is not 

 absolutely certain which course to pursue. 



The share of a walking plow has more wing than the 

 riding plow. This additional wing surface is necessary 

 as a bearing to keep the plow running level. On sulky 

 plows the wheels carry this weight. Hence, when the 

 shares of wheel plows are properly sharpened, only the 

 cutting edge comes in contact with the ground. The 

 effect of the wrong set on a share is immediately notice- 

 able in a walking plow and is identical with that of the 

 wheel plows. The operator has to stand the brunt of 

 the incorrect adjustment that the wheels and frame of 

 wheel plows sustain. 



When one remembers that the point of the share 

 extends a slight distance landward from a line parallel 

 with the landside to make it hold the land, and slightly 

 downward below a line parallel with the bottom of the 



