A. The object of lubrication is to interpose a film of oil, grease or
some lubricant between the two surfaces that will prevent these rubbing
surfaces from coming into too intimate contact.

3. Q. What examinations should be made by the engineer to insure
successful lubrication?

A. See that all oil holes are open, cups filled and in good working
order, the packing in cellars evenly put in and in contact with the
journal. That waste on top of driving or truck boxes is in proper shape,
also that grease cups are filled, and the plugs and jam nuts in good
shape, and that the grease cellars contain sufficient grease for the
next trip.

4. Q. How should feeders of all oil cups be adjusted?

A. To feed as small a quantity of oil as possible and regularly to give
perfect lubrication.

5. Q. Why is it bad practice to keep engine oil close to boiler in warm
weather?

A. The oil is thinned to such a degree by the heat of the boiler that it
runs off as soon as applied, and very often a hot bearing is the result.

6. Q. In what manner would you care for a hot bearing if discovered on
the road?

A. Use as much time as available in cooling the same, making sure that
all moving parts are free and carefully lubricated before proceeding.