Owners Manual
ENGINE
Dj5
Oil Pressure Gauge
The oil gauge gives an indication whether the oiling
system
is
working properly. The normal pressure during
ordinary running should be between
40-45 lb. per square
inch (2.812 to 3.164 kg.jcm.
2
),
with a proportionate
lower pressure when idling.
The gauge should be observed when the engine
is
first started
up
after refilling the sump to check that the
oi
I
is
circulating and that the pressure
is
correct.
It
should also
be
kept under observation frequently during
normal running. Should
the
gauge fail to register a
normal pressure,
it
may be due to lack
of
oil
in
the
crankcase.
If
oil is present and the gauge still fails
to
register, stop the engine immediately and check for a
broken pipe or other cause. Test the gauge by a replace-
ment, clamped direct to the instrument panel.
Check for Loss
of
Pressure
First check the sump oil level by means
of
the
dipstick.
If
the level is well up check the oil gauge pipe
from the crankcase to the instrument panel for fracture
or leak.
If
the pipe
is
in
order remove the sump
and
examine the gauze filter. This may be choked; also
remove the release valve
and
inspect for signs
of
foreign
matter on the valve seat.
If
these tests fail to indicate the
came
of
the loss
of
pressure or oil circulation, the crankshaft
and
other
bearings will have to be closely examined and stripped
down if necessary.
External Filter
It
will be appreciated that the external filter plays
an important part
in
maintaining the cleanliness
of
the
engine oil and so prolonging the life
of
the engine. The
filter must therefore be replaced complete
at
the end
of
its effective life, which
is
approximately 6,000 miles
(7.
200
km.).
It
is
recommended to mark the date
and
mileage on the casing
of
the replacement unit, the correct
unit being A.C. type
ARlC
or
Purolator Micronic type
MF
2001.
The filter cannot be stripped for examination.
Make
sure
that
the filter
is
bolted securely
to
the
crankcase
and
that
the
joint
washer
is
in a sound
condition.
Testing the Filter
When the engine
is
at
a working temperature, with
the engine running
at
a moderate speed, slacken the
centre oil union which
is
the
outlet. Oil should flow
steadily from the union.
If
the
flow
is
intermittent a
faulty filter
is
indicated.
If
it
is
found that no oil
is
circulating through the
filter, the inlet union and its connection should be
checked. This union may be choked with dirty oil.
Always make sure that they are perfectly free from
obstruction when fitting a new filter.
Renewing the Filter
The external oil filter
is
secured to the crankcase
by
a mounting bracket which has drilled oil passages for
oil feed and return.
Fig. 3. The oil filter.
A. Inlet union.
B.
Outlet union.
To
remove the oil filter, withdraw the small and
large union setpins which pass through the bracket into
the
head
of
the filter.
Under
the heads
of
the union set-
pins there are separate
joint
washers
and
between the
filter top
and
the mounting bracket there
is
a common
joint
washer. All three washers should
not
be used a
second time unless they are completely free from damage.
otherwise leaks may occur when the new filter
is
secured
in place.
By
removing the bracket from the
crankcase-two
setpins-before
the new filter
is
fitted, the oilways in the
bracket can be checked to ensure that they are free from
obstruction and absolutely clean on the
joint
faces.
Removing the
Oil Sump
First, drain off the oil by taking out the drain plug;
the oil capacity
is
approximately 7 pints including the
external filter