180 THE OLIVER PLOW BOOK 



The question at once arises as to why the plow will 

 not swerve around so that the line AFC takes the posi- 

 tion AC as one would naturally expect it to do if the 

 draft line is to straighten. The reason for this lies in 

 the draft rod brace GH which is solidly fastened to the 

 draft bar of the plow and the frame in front making a 

 rigid connection on the plow, thus bringing into play 

 another force which places the swivel point of hitch on 

 the tractor instead of on the plow. Naturally when the 

 tractor wheels begin to move towards the furrow wall 

 the front of the plow must move in the same direction. 



Both the rear of the tractor and the front of the plow 

 would continue to move in this direction until the 

 opposing forces would neutralize each other, but both 

 the plow and tractor would be sadly out of shape. 



Another observation from such a condition is that the 

 draft bar I, pulls on the plow and the draft bar brace, 

 GH, pushes, thus we have the two opposing forces, one 

 pulling ahead as it should and the other pushing back 

 as it should not. 



It is plainly evident that undue stress is placed upon 

 all parts of the plow and that the brace, K, is utilized 

 not only to hold the plow beams the proper distance 

 apart, but is pushing the front beam and the parts at- 

 tached forward to offset the back pressure caused by the 

 draft bar brace, GH. 



It is further apparent from Fig. 7, that the farther 

 ahead the tractor is hitched, the less will be the angle 

 of side pull. Then it follows that the only possible way to 

 lessen side draft when conditions will not warrant putting 

 the tractor into the true line of draft is to lengthen the 

 hitch between the plow and the tractor. 



