Installation; Oil Sentry Pressure Switch Location; Testing The Oil Sentry Switch; Testing Oil Pressure - Kohler Courage SV470-600 Service Manual

Section 6
Lubrication System
On vehicular applications (lawn tractors, mowers, etc.),
the pressure switch can be used to activate a ''low oil''
warning light. On stationary or unattended applications,
the pressure switch can be used to ground the ignition
module to stop the engine.
NOTE: Oil Sentry ™ is not a substitute for checking the
oil level BEFORE EACH USE. Make sure the
oil level is maintained up to the ''F'' mark on
the dipstick.

Installation

The pressure switch is installed into the center oil
galley of the filter adapter casting on the closure plate.
Based on the application an elbow adapter may also
be used. See Figure 6-9. On engines not equipped
™
with Oil Sentry , the oil galley is sealed with a 1/8" pipe
plug.
Figure 6-9. Oil Sentry ™ Pressure Switch Location.
To install the Oil Sentry ™ switch:
1. Remove and discard the pipe plug from the center
passage of oil filter mounting pad.
2. Apply pipe sealant with Teflon
59241 or equivalent) to the threads of the 90°
adapter (if used), and the Oil Sentry
3. Install the adapter (if used), and carefully tighten it
to the intended position. Do not over tighten or
damage the adapter.
4. Install the switch into the adapter or center
passage. Torque the switch to 4.5-5.0 N·m
(40-45 in. lb.).
5. Connect the lead to the terminal on the Oil
Sentry ™ switch.
6.4
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Testing the Oil Sentry
The Oil Sentry
switch. It is calibrated to open (break contact) with
increasing pressure and close (make contact) with
decreasing pressure within the range of 2.0/5.0 psi.
Compressed air, a pressure regulator, pressure gauge,
and a continuity tester are required to test the switch.
1. Connect the continuity tester across the blade
2. Gradually increase the pressure to the switch.
3. Gradually decrease the pressure to the switch.
Pressure Switch

Testing Oil Pressure

The engine oil pressure can be tested using an oil
pressure tester. Follow the instructions included with
the tester. The pressure can be tested by removing the
oil filter and installing the tester adapter on the
mounting pad, or by removing the Oil Sentry
switch (or pipe plug) and threading the tester hose
directly into the mounting hole. See Figure 6-10.
® (Loctite ® No.
™ switch.
Figure 6-10. Tester Locations.
Not For Resale
™ Switch
™ pressure monitor is a normally closed
terminal and the metal case of the switch. With 0
psi pressure applied to the switch, the tester
should indicate continuity (switch closed).
The tester should indicate a change to no
continuity (switch open) as the pressure
increases through the range of 2.0/5.0 psi.
The switch should remain open as the pressure is
increased to 90 psi maximum.
The tester should indicate a change to continuity
(switch closed) as the pressure decreases
through the range of 2.0/5.0 psi; approaching
0 psi.
If the switch does not operate as specified,
replace the switch.
™ pressure
Locations
For Tester