148 FARM MACHINERY 



it is possible to run the machine up too far and let the 

 main axle start into the quadrants crosswise. 



202. Main drive chain (13) . Two common types of drive 

 chains are to be found upon the market: the all-malleable 

 link and the malleable link with the steel pin. The lat- 

 ter is perhaps the more desirable, but not so handy for 

 replacing broken links. The main chain should not pass 

 too close to the tire of the main wheel, or it will clog with 

 mud badly. 



203. Cutter bar (14). Twokindsof cutter bars are found, 

 the Z bar and the angle bar. One seems to be as good 

 as the other, but some little difference is to be found be- 

 tween the angle given to the guards, enabling some 

 machines to cut closer to the ground than others. 



204. Main drive shaft (15) . The main drive shaft should 

 be given good clearance from the main wheel to prevent 

 clogging. This shaft is now generally provided with 

 roller bearings, and often self-aligning bearings, which 

 prevent any possible chance for the shaft to bind and 

 thus increase the friction. 



205. Butter or adjuster (16). The canvas butter has 

 always been very satisfactory, except it was short- 

 lived. Often it was the first part of the binder to be re- 

 placed. This led several makers to build an adjuster 

 which had oscillating parts or board. The single board 

 seems to be just as satisfactory, as the upper half of the 

 two-board adjuster does very little good. The all-steel 

 belt as now commonly used upon push binders is no 

 doubt the most satisfactory butter made. It is durable 

 and efficient, but not generally adopted, probably on ac- 

 count of its cost. 



206. Packers (17). The packers should practically cover 

 the deck, reaching within an inch or so of the deck roller. 

 This will prevent any tendency to clog in heavy grain. 



