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Westerbeke 20.0KW sbeg Specifications Page 30

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  • TROUBLESHOOTING
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OIL
PRESSURE
NOTE:
WESTERBEKE recommends that the following engine
adjustments be pet/armed by a competent engine mechanic.
The information below is provided to assist the mechanic.
DESCRIPTION
The lubricating
system
is
a pressure
feeding
system
using
an
oil
pump.
The engine
oil
is
drawn
from
the
oil
sump
by
the
oil
pump,
which
drives
the
oil,
under
pressure,
through
the
oil
filter and
various
lubricating
points
in
the
engine.
The
oil
then
returns
to
the
oil
sump
to
repeat
the
continuous
cycle.
When
the
oil
pressure
exceeds the specified pressure,
the
oil
pushes
open
the relief
valve
in
the
oil
pump
and
returns
to
the
oil
sump,
keeping
the
oil
pressure
within
its
specified
range.
TESTING
OIL
PRESSURE
To
test the oil
pressure,
remove
the
oil
pressure sender
and
install
a mechanical
oil
pressure
gauge
in
its
place.
After
warming
up
the engine,
set
the engine
speed
at
1800
rpm
and
read
the oil pressure
gauge.
011"-""'
Between
55
and
76
pslal1800
rpm.
Note:
A newly started (cold) engine
may
have an oil
pressure
up
to 70
or
80
psi. A warmed engine can have
an
oil pressure
as
low
as
40
psi. Oil pressure will vary
depending
on
the load placed on the generator.
MECHANICAL
OIL
PRESSURE
GAUGE
LOW
OIL
PRESSURE
The
specified safe minimum oil pressure
is
15.0 - 10.0
psi
A gradual loss
of
oil
pressure usually indicates a worn/faulty
oil
pressure relief
valve
or
worn
bearingslbushings. For
additional infonnation on low oil pressure readings, see
the
ENGINE TROUBLESHOOTING chart.
OIL
PRESSURE
SENSOR
The
generator's drive engine
has
an
oil
pressure
sensor
mounted
off the
oil
gallery.
This
sensor,
during generator
operation,
is
sending
a
DC
voltage
to
the
ECU
that
it
interprets
as
oil
pressure.
Should
the
engine's
oil
pressure
drop
below
a
safe
minimum,
the
DC
voltage
to
the
ECU
will
drop.
The
ECU
will
interpret
this
as
a
low
oil
pressure
fault
and
stop
the
generator.
OIL
PRESSURE
SENSOR
'..v"
WESTERBEKE
Engines & Generators
18
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