2l6 FARM MACHINERY 



blast after it has left the fan. The bevel gears by which 

 the fan is often driven are a source of trouble if the gears 

 do not mesh correctly from the beginning. They have 

 been known to Avear out completely in a few days' work. 

 In order to obviate this trouble, the stacker drive belt is 

 often required to make the turn over two pulleys and 

 drive the fan direct. This method also gives some 

 trouble. 



The wind stacker without doubt requires more power 

 than a straw carrier, but saves labor. It is impossible 



FIG. 163 A WIND STACKER. THE FAN DRUM IS NOT SHOWN 



to save the straw as well, but often the straw is con- 

 sidered to be of little value. 



299. The weigher is an attachment by which the threshed 

 grain is weighed and measured as threshed. It is a very 

 satisfactory arrangement to have on a machine doing 

 custom work. The weigher is nearly always provided 

 with an elevator by which the grain is elevated into the 

 wagon box. To do the elevating, pans or buckets pass- 

 ing through a tube are used. A few r pneumatic grain ele- 

 vators have been used, but not to any extent. When it 



