6.4
Section 6
Lubrication System
Figure 6-9. Engine Mounted Oil Filter.
Oil Sentry
™
Some engines are equipped with an optional Oil
Sentry
™
oil pressure monitor. If the oil pressure
gets low, Oil Sentry
™
will either shut off the engine
or activate a warning signal, depending on the
application.
Operation
The pressure switch is designed to break contact
as the oil pressure increases and make contact as
the oil pressure decreases. At oil pressure above
approximately 2 to 5 psi, the switch contacts open.
At oil pressures below approximately 2 to 5 psi, the
switch contacts close.
On stationary or unattended applications (pumps,
generators, etc.), the pressure switch can be used
to ground the ignition module to stop the engine. On
vehicular applications (lawn tractors, mowers, etc.),
the pressure switch can be used to activate a ‘‘low oil’’
warning light.
NOTE: Make sure the oil level is checked BEFORE
EACH USE and is maintained up to the ‘‘F’’
mark on the dipstick. This includes engines
equipped with Oil Sentry
™
.
Figure 6-7. Oil Pickup.
Oil Pressure
Relief Valve
Oil Pressure
Relief Valve
Figure 6-8. Oil Pressure Relief Valve Styles.
Oil Filter
These engines are equipped with a full-fl ow oil fi lter.
See Figure 6-9.
The oil fi lter helps remove sludge and other
combustion by-products from the oil. It also extends
the oil change interval and cools the oil.
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