MANURE SPREADERS IQ7 



The use of gears is avoided entirely in at least one 

 make by passing the drive chain over the top of the 

 main sprocket and back instead of around it. This re- 

 verses the direction of rotation (Fig. 148). Some 

 spreaders are so arranged that a large part of the main 

 drive must be kept in motion even when the machines are 

 out of gear. The gearing must be well protected, or it 



FIG. 149 A CHAIN AND GEAR DRIVE TO THE BEATER. THE BEATER IS 

 PLACED IN GEAR BY MOVING BACK UNTIL GEARS MESH 



will become fouled in loading. The main axle must be 

 very heavy on a spreader, as a large share of the load is 

 placed upon it, and it must not spring or it will increase 

 the draft greatly. Large bearings should be provided 

 with a reliable means of oiling and excluding dirt. 



271. Beaters. The beater is usually composed of eight 

 bars filled with teeth or pegs for tearing apart and pul- 



