CRB AMBRY MECHANICS 293 



boiler room, thence outside the building. The exhaust 

 steam will be ample to heat all the water needed for 

 washing as well as that used for the boiler. A great deal 

 of fuel can be saved in a creamery by properly utilizing 

 the exhaust steam. A drip cock will have to be placed 

 at the bottom turn of the exhaust pipe to permit drain- 

 ing it. 



When the engine is placed in the creamery proper, it is 

 very essential to have cylinder drain pipes to carry away 

 the water and partially condensed steam that is found in 

 the cylinder when the engine is started. 



In piping avoid turns as much as possible and provide 

 exhaust pipes of ample size. 



CARE AND MANAGEMENT OF ENGINE. 



1. It is essential to have all parts of the engine well 

 oiled, using nothing but the best oil. 



2. Keep the engine clean. The shiny parts should be 

 brightened at least once a day. 



3. Keep the engine well "keyed up/' At both ends 

 of the connecting rod are keys, one of which is shown in 

 Fig. 51. The purpose of these keys is to keep the brass 

 boxes tight enough to prevent undue play. The "keying" 

 consists in loosening the burrs next to the key and then 

 tapping the latter lightly until the unnecessary play is 

 taken up. Care must be taken, however, not to get the 

 brasses too tight or a hot box will be the result. "Pound- 

 ing" is usually caused by not having the keys properly 

 set. It is also caused by wet steam and water in the 

 cylinder. 



4. Keep stuffing boxes carefully packed to prevent 

 leakage of steam. The packing should be treated with 

 graphite or good cylinder oil and packed firmly around 



