Heavy bodied lubricants,
particularly residual types used on exposed gears, are often heated in order to
make application easier. If such lubricants are straight mineral oil products, the
amount and intensity of heat should not harm them. However, if additives are
included, only a very moderate heat should be used. Otherwise some change in the
composition is possible. A supplier of the lubricant can advice the limitations
on heating. A similar caution is necessary in case lubricating greases are used
as gear lubricants. The thickeners for such products may be soaps which upon
the application of considerable or prolonged heat will separate from the oil
present.
