LUBRICATION AND ADJUSTMENT OP BEARINGS 45 



can containing a quart or so of cylinder oil should be kept 

 on the boiler in cold weather so that it will always be heated 

 and ready for use. 



Hard Oil has many qualities to recommend it. It stays 

 on the bearing, and as it wears well, a little of it will go a 

 long way. The usual method of applying hard oil is by 

 means of compression cups, of which the one used on the 

 cross-head is an example. Each time the engine is stopped, 

 the cup should be turned to take up the "slack" and force 

 in a little grease. 



Approximate Cost of Oils. The price of oil varies so 

 greatly that no specific figures can be given. However, it 

 may be stated that good lubricating oil cannot be purchased 

 in quantities of five or ten-gallon lots at less than twenty- 

 five cents per gallon, while cylinder-oil, in like quantities, 

 cannot be purchased ordinarily at less than sixty cents per 

 gallon. These are minimum figures, and in localities where 

 commodities in general are high, the retail prices of good 

 oils may be twice as high as those quoted, or even more. 



The "Ideal" Spring Grease Cup. This is a compres- 

 sion cup in which the hard oil is forced out by a plunger 

 pressed down by a spring. The action of the spring is 

 limited by a thumb screw so that only the desired amount 

 of grease will be fed. This cup is used on the crank-pin 

 of all Case engines. To fill, raise the plunger by screwing 

 down the thumb nut as far as it will go. Then remove the 

 cap, fill the cup with grease and replace the cap. Unscrew- 



