Engine Service Manual

51
Lubrication System
32 690 03 Rev. I KohlerEngines.com
OIL SENTRY
™
(if equipped)
NOTE: Make sure oil level is checked before each use,
and is maintained up to FULL or F mark on
dipstick. This includes engines equipped with
Oil Sentry
™
.
This switch is designed to prevent engine from starting in
a low oil or no oil condition. 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 manuals for more information.
Oil Sentry
™
pressure switch is installed in oil fi lter
adapter. Pressure switch is designed to break contact as
oil pressure increases above 3-5 psi, and make contact
as oil pressure decreases below 3-5 psi.
On stationary or unattended applications (pumps,
generators, etc.), pressure switch can be used to ground
ignition module to stop engine. On vehicular applications
(lawn tractors, mowers, etc.) pressure switch can only be
used to activate a low oil warning light or signal.
Installation
1. Apply pipe sealant with Tefl on
®
(Loctite
®
PST
®
592™
Thread Sealant or equivalent) to threads of switch.
2. Install switch into tapped hole in oil fi lter adapter.
3. Torque switch to 4.5 N·m (40 in. lb.).
Testing
Compressed air, a pressure regulator, pressure gauge,
and a continuity tester are required to test switch.
1. Connect continuity tester across blade terminal and
metal case of switch. With 0 psi pressure applied to
switch, tester should indicate continuity (switch
closed).
2. Gradually increase pressure to switch. As pressure
increases through range of 2-5 psi tester should
indicate a change to no continuity (switch open).
Switch should remain open as pressure is increased
to 90 psi maximum.
3. Gradually decrease pressure through range of
2-5 psi. Tester should indicate a change to continuity
(switch closed) down to 0 psi.
4. Replace switch if it does not operate as specifi ed.