PROJECTS IN FARM MACHINERY OPERATION 295 



2) See that the clutch works freely. 



3) If brakes are provided, see that they are released. 



4) Study the manipulation of the various controlling levers. 



FIG. 313. Plowing with a tractor. 



5) See that the gears are not in mesh. 



6) See that the clutch is not engaged. 



7) Turn on gasoline. 



8) Open needle valve on carburetor. 



9) Retard the spark. 



