Oil Pressure; Testing Oil Pressure - Westerbeke 8.0KW-60Hz ENDT Operator's Manual

OIL PRESSURE
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, oil cooler 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 speci-
fied 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.
OIL PRESSURE
The engine's oil pressure, during operation, is indicated' \
by the oil pressure gauge on the instrument panel. During
normal operation, the oil pressure will range between 40 and
60 psi (2.8 and 4.2 kgfcm 2
).
NOTE: A newly started, cold enginec.an have an oil pressure
reading up to 60 psi
(4.2
kg/cm2). A warmed engine can have
an oil pressure reading as low as 35 psi (2.5 kg/em
2
).
These
readings will vary depending upon the temperature o/the
engine and the rpms.
LOW OIL PRESSURE
The specified safe minimum oil pressure is 4.3
+
1.4 psi (0.3
+
0.1 kgfcml). A gradual loss of oil pressure usually indicates
a worn bearings. For additional information on low oil pres-
sure readings, see the ENGINE TROUBLESHOOTING chart.
OIL PRESSURE RELIEF VALVE
An oil pressure relief valve is located on the engine block
just below the injection pump. This valve opens at
appoximately 50 psi [343 kpa] and maintains that pressure.
LOCATED JUST
UNDER THE
FUEL INJECTION
PUMP ON THE
ENGINE BLOCK.
FROM ENGINE BLOCK
i '"
TESTING OIL PRESSURE
:, i , /
~
r :
OIL PRESSURE
MANIFOLD
OI~fBESSURE
35.0 IbM (3.8 Kg/em') or more al1800 rpm.
Oil PRESSURE SENSOR
An oil pressure sensor is mounted on the oil manifold for the
engine. It sends a voltage signal to the ECU that is interpreted
as pressure. Should this signal fall below a set point in the
ECu. The ECU will open the K2 run relay shutting the unit
down. It will then display the fault on the LCD Display
screen. Engine oil pressure dropping 10 - 15 psi will cause
this to occur.
NOTE: To test the oil pressure, install a mechanical pressure
gauge as shown. Warm up the engine and read
the
oil pres-
sure gauge.
Oil
Pres.mre should be
35.0
lb/in
2 (3.8
Kg/cnr)
or more at 1800 rpm.
Eng/nes
&
Generators
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