Installation 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
nonnal operation, the oil pressure will range between
40 and
60
psi
(2.8 and 4.2 kg/cm
2
).
NOTE:
A
newly
started,
cold
engine
can
have an oil
pressure
reading
up
to
60
psi
(4.2
kg/crrf).
A warmed engine
can
have
an
oil
pressure
reading
as
low
as
35 psi (2.5 kglcm
2
).
These
readings
will
vary
depending
upon
the
temperature
of
the
engine
and
the
rpms.
ยท
OIL
PRESSURE
SWITCH
!NORMALLY
OPEN]
OIL
PRESSURE
/
SENDOR
OIL
GALLERY
SEA
RAY
SPECIFICATIONS
OIL
PRESSURE
SWITCH
[NORMALLY
OPEN]
OIL
PRESSURE
SENDOR
-.:ESTING
OIL
PRESSURE
To
test the oil pressure, remove the oil pressure sender, then
install a mechanical oil pressure gauge in it's place. After
warming up the engine, set the engine speed at
1800 tpm
and read the oil pressure gauge.
Oil
Pressure
35.0
lb/in'
(3.8
kg/em')
or
more
ai18DD
rpm.
Sender
and
Switch
Torgue
9 -13
fl-lb
(1.2
-
1.8
m -kg).
FROM
ENGINE
BLOCK
TESTING
OIL
PRESSURE
OIL
PRESSURE
MECHANICAL
OIL
PRESSURE
GAUGE
'\.
LOW
OIL
PRESSURE
20
The specified safe minimum oil pressure is 4.3 + 1.4 psi (0.3
+ 0.1 kg/cm
2
).
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.