LUBRICATION AND ADJUSTMENT OF BEARINGS. 4! 



not be screwed up too tightly. If screwing up moderately 

 tight does not stop leakage, put in new gaskets on both sides 

 of the glass. In repacking the sight-feed glass, first remove 

 every particle of the old packing. Two kinds of gaskets 

 are furnished. Put a soft rubber one next to the glass on 

 both sides and a red fibre one next to the nut. Usually this 

 nut can be screwed up with the fingers tight enough to pre- 

 vent leaking. The valve stems may be packed with Italian 

 hemp or candle wicking. 



Adjustment of Bearings. In adjusting the bearings of 

 the engine, take up just a little of the lost motion at a time, 

 until the pounding is stopped. Do not attempt to take it 

 all out at once, for in so doing there is risk of heating and 

 cutting. The young engineer often finds it difficult to locate 

 a "pound" in an engine, but an experienced man can 

 usually tell where it is by taking hold of the connecting-rod 

 or eccentric-rod as the engine runs. A good plan, and one 

 that will often show where the trouble lies, is to have a man 

 take hold of the fly-wheel and turn it an inch or so back and 

 forth. By watching the crank-box, cross-head, main bear- 

 ings and the reverse, any lost motion can be seen. 



The Connecting- Rod Brasses are ed justed by loosening 

 the jam nut at the bottom and turning the head of the bolt, 

 which will raise the wedge, and crowd the two halves of the 

 box together. When the halves of the brasses touch, they 

 must be taken out and filed. To take out the brasses for 

 filing, remove the connecting-rod in the following manner: 



