396 FARM MOTORS 



up before full steam is turned on. If full steam is turned 

 on at once there is danger of more water being condensed 

 than the cylinder cocks will carry away. If the engine 

 has a reverse gear, it may be worked back and forth and 

 thus both ends of the cylinder allowed to warm up at 

 once. As soon as the engine has reached its speed and 

 dry steam comes from the cylinder cocks they can be 

 closed and the throttle thrown wide open. The cylinder 

 lubricator and other oil cups can now be started, and if 

 necessary the boiler pump or injector. 



544. Running the engine. After the engine is once 

 started all bearings should be watched to see that they 

 do not heat. When they get so warm that the hand can- 

 not be borne on them the engine should be stopped and 

 the bearings loosened. If the engine runs properly, all 

 repairs that can be made while the engine is in motion 

 should be attended to: the oil supply looked after, oil 

 cups kept full, etc. 



545. Stopping the engine. To stop the engine the 

 throttle should be closed arid the cylinder cocks then 

 opened. The throttle may be closed quickly without in- 

 jury to the boiler or the cylinder, providing there is 

 plenty of water in the boiler. Close all lubricators. The 

 cylinder cocks should be left open until after the engine 

 starts again. If the engine is stopped for only a short 

 interval, the cylinder walls will cool off so little that the 

 engine can be quickly started. It is not well, however, to 

 start the engine into full speed at once. This throws 

 too much strain on the working parts. 



546. Leaks. Engines should be occasionally tested 

 for steam leaks past the valve or the piston. The easiest 

 and surest method to do this is to use the indicator, but 

 wherever this is not possible the valve can be tested by 

 placing it in its central position and turning on steam. 



