Kohler MAGNUM M18

SECTION 7
LUBRICATION SYSTEM
Every 500 hours of operation, separate the pump from
the engine. Clean the splined areas and lightly
grease the male portion of pump spline. Use either
Dow Coming G-N Metal Assembly Paste or #77 As-
sembly Paste.
As you remount the pump to the engine, be certain the
mating surfaces are clean and free of any foreign ma-
terial, and that the pump is correctly aligned.
If you have a splined insert that has been damaged,
the following kits are available for spline replacement.
Descriptio! Kohler Part No.
9 tooth insert 82 755 02
11 tooth insert 48 755 23
13 tooth insert 48 755 21
OIL SENTRY™ OIL PRESSURE MONITOR
Some engines are equipped with the optional Oil
Sentry™ oil pressure monitor. Oil Sentry™ will either
Stop the engine or activate a “low oil" waming light, if
the oil pressure gets low. Actual Oil Sentry™ use will
depend on the engine application.
Operation
Oil Sentry™ uses a pressure switch in one of the main
crankcase ail galleries to detect low oil pressure. At
Gil pressures below approximately 3-1/2 psi, the pres-
sure switch closes. At oil pressures above approxi-
mately 3-1/2 psi the pressure switch opens.
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 (garden tractors, mowers,
etc.), the pressure switch can be used to activate a
“low oil" waming light.
NOTE: Oil Sentry™ is not a substitute for checking oil
level BEFORE EACH USE. Make sure the oil
level is maintained up to the "F" mark on dip-
Stick.
Installation
The pressure switch is installed in the oil gallery lo-
cated near the dipstick tube and closure plate on the
#1 side of crankcase (refer to Figure 7-5). On engines
not equipped with Oil Sentry™, the oil gallery Is
sealed with a 1/16" N.PT.F. pipe plug.
1. Remove the 1/16" М.РТЕ pipe plug (or old switch
and reducer) from crankcase.
2. Apply Loctite& No. 592 Teflon sealant (or equiva-
lent) to threads of switch. install reducer to switch
and tighten securely.
3. Apply Loctite& No. 592 Teflon sealant (or equiva-
lent) to threads of reducer. Install reducer/switch
assembly into crankcase. Tighten the reducer
securely into the crankcase.
Testing
The pressure switch is a normally closed type,
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, a pressure
gauge, and a continuity tester are required to test the
Switch.
1. Connect the continuity tester across the blade ter-
minal and metal case of switch. With O-psi pres-
sure applied to switch, the tester should indicate
continuity (Switch closed).
2. Gradually increase the pressure to the switch.
The tester should indicate a change to no continu-
ity (switch open) as the pressure increases
through the range of 2.0/5.0-psi. The switch
should remain open as 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.
7.4