TILLAGE MACHINERY 95 



Raise of rigs. Springs should be provided to aid the 

 operator in lifting the heavy rigs. Also these springs are 

 often used to aid in forcing the shovels into the ground. 



Levers. In riding cultivators the lifting levers should 



FIG. 66 A RIDING BALANCE-FRAME FOUR-SHOVEL CULTIVATOR WITH HAM- 

 MOCK SEAT AND STEEL GANGS 



be so placed as to be easily handled from the seat. In 

 two-row machines it is very essential to be able to work 

 each gang independently in raising and lowering. In 

 this way one gang may be freed from trash without 

 molesting the others. 



Balance frame is a name applied to cultivators so con- 

 structed that the position of the wheels may be so ad- 

 justed, either by a lever for the purpose or by the move- 

 ment of the gangs, as to balance the weight of the driver 

 and cultivator on the axle. 



