114 SCIENCE OF SUCCESSFUL THRESHING. 



one-half inches from the center of the bolt holding the cast- 

 ing, i84W or 222 W. Then bolt steady-bearing, IO4W, on 

 the inside of the axle with seven-sixteenths by four and 

 three-fourths inch bolts. Next put the knuckle on the spur- 

 pinion shaft and connect it with the short rod, OI2SW, 

 which passes through the casting, IO4W, and through the 

 hole in the axle. 



Attaching Truck-Brake to Iron-Frame Horse-Power. 

 Put the brake pipe under the main frame with casting 2ioW, 

 face down and on the right-hand side. The pipe is located 

 between the two five-eighths inch hooks and rear wheel, 

 the short ends of the hooks coming outside of the iron 

 frame. In order to prevent the nuts from working loose, 

 the ends of the hooks may be riveted. When this is done, 

 casting 32 iW may be bolted on top of the flange of the main 

 frame. A hole to receive it will be found on the front end 

 of the power frame. Next insert the iron lever into its socket, 

 2ioW, and tighten the set-screws, which should not be 

 tightened too much, or they will cause unnecessary strain 

 on casting 2ioW. Put the ratchet in casting 232 W with 

 the hole down and with the notches turned towards the 

 front. Then, put it in the notch that holds the brake from 

 the wheels, and bolt it to the brake lever below. Place the 

 brake-block casting, 2o8W, on the right end of the pipe and 

 2ogW on the left; bring the blocks against the wheels and 

 turn the set screws up tight; then loosen and remove, and 

 with a file or cold chisel, flatten a place on the pipe for the 



