Testing Oil Pressure - Westerbeke 22.0 KW EDE-60Hz 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 kglcm2).
NOTE:
A newly started,
cold
engine can have an oil pressure
reading up to 60 psi
(4.2
kglcm 2
).
A warmed engine can have
an oil pressure reading as low as 35 psi (2.5 kg/cm2). These
readings will vary depending upon the temperature a/the
engine and the rpms.
LOW OIL PRESSURE
The specified safe minimum oil pressure is 4.3 + 1.4 psi (0.3
+
0.1 kg/cmZ). 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
The oil pressure relief valve is located in the front gear case
cover below the lube oil filter. It is held in place by an 8mm
allen head plug. This valve opens at approximately 50 psi
(343kpa) and operates to maintain the pressure in the lube oil
feed system.
TESTING OIL PRESSURE
\
NOTE:
To test
the
oil pressure, install a mechanical pressure
gauge as shown. Wann up the engine and read the oil pressure
gauge. Oil Pressure should be 35.0 lblin' (3.B Kg/cm') or more
at lBOO rpm.
OIL PRESSURE SENSOR
An oil pressure sensor is mount,ed 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. Wann up the engine and read the oil pres-
sure gauge. Oil Pressure should be 35.0 lb/in 2
(3.8
Kglcm 3
)
or more at 1800 rpm.
Engines
&
Generators
20