cycled a few minutes. However, it is a good practice to
check to make sure there is oil in the crankcase, then
follow the manufacturers recommendations.
The oil filter removes most of the impurities that
were picked up by the oil as it circulated through the
engine. Two types of filter element configurations are in
use: the cartridge type and the sealed (spin-on) type
CARTRIDGE FILTER. The cartridge filter
element fits into a permanent metal container. Oil is
pumped under pressure into the container where it
passes from the outside of the filter element to the center.
From here the oil exits the container. The filter element
is changed easily by removing the cover from the
SEALED (SPIN-ON) FILTER. The sealed
(spin-on) filter element is completely self-contained,
consisting of an integral metal container and filter
element. Oil is pumped into the container on the outside
of the filter element. The oil then passes through the
filter to the center of the element where it exits the
container. This type of filter is screwed onto its base and
is removed by spinning it off.
Figure 1-41.-Oil filters.