Oil Pressure - Westerbeke 4.5KW BCGB-60HZ Operator's Manual

OIL PRESSURE
NOTE:
WESTERBEKE recommends that the following engine
adjustments be peifonned by a competent engine mechanic.
The infonnation 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, 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
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 DlL PRESSURE
To test the oil pressure, remove the hex head plug from the
oil manifold 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.
Oil Pressure Between 30 and 40 psi at 1800 rpm.
Note:
A newly started (cold) engine may have an oil pres-
sure up to 70 or 80 psi. A warmed engine can have an oil
pressure as low as 30 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 4.3
+
1.4 psi (0.3
+
0.1 kg/cm'). A gradual loss of oil pressure usually indicates
worn bearings. For additional infonnation on low oil pressure
readings, see the ENGINE TROUBLESHOOTING chart.
OIL PRESSURE SWITCH
The generator is fitted with an oil pressure sendor and a
shutdown switch. Should the engine's oil pressure drop
below the safe minimum, the switch will shut the engine
down to prevent damage by interrupting the DC voltage to
the K2 run relay.
NORMALLY OPEN 5 PSI RATED
+
~~
K2 RELAY
1
iBATTERY
....
PRESSURE
OIL COOLER
Engines
&
Generators
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