-8 - 



brake bolt helps determine length of plunger stroke, which in turn regulates 

 amount of material delivered per stroke. Mth bolt in position shown on pages 

 6 and 7, length of stroke in one -nozzle sprayer is about 2 1/4 inches, of two- 

 nozzle sprayer about 1^ inches. 



Use compression spring strong enough to lift pump plunger when animal 

 has stepped off treadle. 



Use shock spring strong enough to absorb some of jar when animal 

 suddenly steps on treadle. 



Adjust connecting rods of two -nozzle sprayer so that weight on treadle 

 pulls plungers of both pumps at same time. 



In both one-nozzle and two-nozzle sprayers, take great care to see that 

 sprayer parts are lined up to give straight pull on pump plunger and connecting 

 rods. 



The one -nozzle sprayer can be converted to the two -nozzle sprayer or 

 the two-nozzle to the one-nozzle in a few minutes. 



INSTALLING AN AUTOMATIC SPRAYER 



Pictures on the facing page show a two -nozzle sprayer being installed in 

 the lane of a large dairy farm. 



A. — The working unit has been completed and is ready to be placed where 

 cattle will have to step on the treadle when they go between barn and pasture. 



B. — A wide piece of scrap lumber has been nailed between two posts of the 

 board fence that forms one side of the lane. Several boards of smaller width 

 would do just as well. Two new posts (black) have been set in the ground about 6 

 feet apart and about 2^ feet from the lane fence. The ground between these posts 

 and the lane fence has been leveled to give a firm foimdation for the sprayer 

 frame. The working unit of the sprayer is then set in place. The upright sup- 

 port with cans and pumps is between the two new posts. The treadle is in the 

 runway between the posts and the lane fence. 



C. — Boards (they may be scrap lumber) are nailed to the two new posts 

 to form one side of the runway or chute and to protect delicate parts of the 

 sprayer from the cows. The boards should be so placed that they do not in any 

 way interfere with operation of the sprayer. Nozzles and cans should not pro- 

 ject into the runway beyond the boards. 



D. — Ends of the boards on the new posts have been sawed off to prevent 

 injury to cows, and a board has been nailed between the top of each new post 

 and the fence opposite to complete the chute. Burlap bags are then nailed to 

 the frame to form a windshield. A windshield of burlap, canvas, or other suit- 



