Oil Pressure Switch - Westerbeke 12C- TWO Operator's Manual

ENGINE ADJUSTMENTS
NOTE: WESTERBEKE recommends that the following engine adjust-
ments be peTjonned by a competent engine T(lechanic. The infonnation
below is provided to assist the mechanic.
TESTING OIL PRESSURE
To test oil pressure, remove the hex head plug from the oil
gallery and install a mechanical oil pressure gauge in its
place. After warming up the engine, read the oil pressure
gauge.
OIL PRESSURE BETWEEN 35 AND 55 PSI
NOTE: A newly started, cold engine may have an oil pressure
reading up to 70 or 80 psi. A wanned engine can have an oil
pressure reading as low as 30 psi. Oil pressure will vary
del,eruljng upon the load placed on the engine.
OIL PRESSURE GAUGE
WITH ADAPTER
TESTING DlL PRESSURE
THIS MECHANICAL TEST' GA1JGECA~
INSTALLED WHERE THE OIL HU~H~' I cH;
THE ENGINE BLOCK OR. IN PLACE OF THE
OIL PRESSURE SENDER.
A
CAUTION:
Be sure to stop the engine
bef~re
checking the engine. Keep your hands away from
rotating parts such as the cooling fan, v·belt, pulleys,
and flywheel. Keep long hair away from rotating parts
and do not wear music earphones.
LOW OIL PRESSURE
A gradual loss of oil pressure usually indicates a worn bear-
ings. A rapid loss of oil pressure indicates a specific bearing
failure. For additional information on low oil pressure ,ead-
ings, see the ENGINE TROUBLESHOOTING chart.
OIL PRESSURE RELIEF VALVE
The
all
pressuterelief valve is located. in the front gear case
cover just below the oil pressure senders location. It is held
in place by a 22mm hexhead plug. This valve's cracking
pressure is approximately 45 psi and operates to maintain the
pressure in the engine's lubricating system.
OIL PRESSURE SWITCH
There is an oil pressure switch connected into the engine's
oil gallery to monitor the engine oil pressure and to sonnd
the panel alarm buzzer. should a low oil pressure issue occur
(5-10 psi). The engine alarm buzzer in such cases will sound
continuously.
NOTE: This alann will sound when starting the engine and
will shut off once il-ie oil pressure exceeds 5-10 psi.
Engines & Generators
40