6.4
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
®
(Loctite
®
No.
59241 or equivalent) to the threads of the 90°
adapter (if used), and the Oil Sentry
switch.
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.
Testing the Oil Sentry
Switch
The Oil Sentry
pressure monitor is a normally closed
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
terminal and the metal case of the switch. With
0
psi
pressure applied to the switch, the tester
should indicate
continuity (switch closed)
.
2. Gradually
increase
the pressure to the switch.
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
.
3. Gradually
decrease
the pressure to the switch.
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.
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
pressure
switch (or pipe plug) and threading the tester hose
directly into the mounting hole. See Figure 6-10.
Locations
For Tester
Pressure Switch
Figure 6-10. Tester Locations.
Summary of Contents for Kohler SV470
Page 1: ...Workshop manual Kohler Courage Tractor Engines English ...
Page 3: ......
Page 17: ...1 14 Section 1 Safety and General Information ...
Page 43: ...5 16 Section 5 Fuel System and Governor ...
Page 93: ...9 14 Section 9 Inspection and Reconditioning ...
Page 116: ...2004W27 114 03 04 26 ...