6.4
Section 6
Lubrication System
Oil Sentry
™
General
Some engines are equipped with an optional Oil
Sentry™ switch. This switch is designed to prevent
the engine from being started in a low oil or no oil
condition. The Oil Sentry™ may not shut down
a running engine before damage occurs. In some
applications this switch may activate a warning signal.
Read your equipment manual for more information.
The pressure switch is designed to make contact as the
oil pressure decreases below 2-5 psi depending upon
the application and switch specifi ed.
On stationary or una ended 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 only be used to activate a low
oil warning light or signal.
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™.
Installation
The Oil Sentry™ pressure switch is installed into the
breather cover. See Figure 6-10.
Figure 6-10. Location of Oil Sentry™ Switch.
Oil Cooler
10. Test run the engine to check for leaks. Stop the
engine, allow a minute for the oil to drain down,
and recheck the level on the dipstick. Verify the
oil level is up to but not over the F or FULL mark
on the dipstick. See Figure 6-4.
Service Oil Cooler
Some engines are equipped with an optional oil
cooler. Inspect and clean oil cooler every 100 hours of
operation (more frequently under severe conditions).
Oil cooler must be kept free of debris. Service the oil
cooler as follows:
1. Clean the outside of the fi ns with a brush or
compressed air.
2. Remove the hardware securing the oil cooler to
the blower housing.
3. Clean the inside of the cooler with a brush or
compressed air.
4. Reinstall the oil cooler to the blower housing with
the mounting hardware. See Figure 6-9.
Figure 6-9. Remote Oil Cooler.
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