62 SCIENCE OF SUCCESSFUL THRESHING 



belt runs properly on the fly-wheel. Move the front end 

 of the separator in the same manner until the belt runs 

 properly on the cylinder pulley. If trouble be experienced 

 in getting the engine in line, this method may be used to 

 correct the alignment until practice enables the operator 

 to set the engine so that the belt will run in the center of 

 both pulleys. This "jacking over" of the front of the 

 engine or of the separator should be done while the belt 

 is running. The friction-clutch should always be used 

 in tightening and in backing the engine into the belt. 



'Ascending Hills. In coming to a steep hill the engi- 

 neer should see that he has about the right amount of water 

 in the boiler, that is, enough to show about two inches in 

 the glass when the boiler is level. With the boiler too full 

 there may be danger of priming, which should be espec- 

 ially avoided on a hill. It is also necessary to exercise 

 judgment in regard to the fire. It should be hot enough 

 to insure sufficient steam pressure to climb the hill without 

 stopping. On the contrary, the engine should not be al- 

 lowed to blow off when pulling hard on a hill, as this is 

 liable to cause priming, necessitating stopping. In short, 

 when approaching a steep hill, prepare for it so that you 

 know you can ascend without stopping. In ascending a 

 hill, avoid running fast, as a moderate rate of speed gives 

 best results. If the engine shows a tendency to prime, 

 the speed should be limited by means of the throttle so 

 that the engine may run just fast enough to pass its dead- 

 centers. 



