Kohler MAGNUM M18

M18 & M20
SECTION 7
LUBRICATION SYSTEM
OPERATION
oil
pump
maintains
high
oil
flow
and
oil
pressure,
even
Magnum
M18
and M20
engines
use a
full-pressure
at
low
speeds
and
high
operating
temperatures.
A
lubrication
system
that delivers oil
to
the
crankshaft,
pressure
relief
valve,
iocated
in the
engine
crankcase
camshaft,
and
connecting
rod journal
surfaces.
Under
behind
the
closure
plate,
limits
the
maximum
oil
pres-
normal
engine
operating
conditions,
the
oil
pressure
sure
in
the
system.
No
adjustments
to
relief
valve
are
can
be
as
high
as
50
psi.
A
high-efficiency
Gerotor™
possible.
Refer
to
Figure 7-1.
Camshaft
Connecting Rod
Journal Surfaces
Bearing Surfaces
Camshaft
Full-Flow
Crankshaft
Crankshaft
Oil
Filter
Bearings
Oil Level
Oil Pump
Pressure
Relief
Oil
Level
Valve
Oil Pickup
Figure 7-1. Full-Pressure Lubrication System.
LUBRICATION
SYSTEM
SERVICE
The
crankcase
must
be
split
to
service
the
pump
il
pi
|
The
oil
pump
cover
and
rotors,
and
pressure-relief
shan,
drive
gear, oil
pickup,
etc.
valve can be serviced without splitting the crankcase. Refer to Figures 7-2, 7-3, and 7-4. Also refer to the
Remove the rear closure plate to service those parts. “Disassembly” and "Reassembly" Sections for oil
pump component removal and installation
procedures.
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