A
LUBRICATION
SYSTEM
SECTION
A3
ENGINE
LUBRICATION
SYSTEM
The
engine lubrication system
Is
of
the
dry
sump
type
utilising a duplex gear pump and
the
ollis
fed
by gravity from
the
tank
to
the
pump.
Under
pressure
from
the
feed pump, all
Is
forced via a
cartridge
type
filter
through
drillings
In
the
crank-
shaft
to
the
Inner main bearings and big ends,
whence
it
escapes and lubricates
the
cylinder walls,
outer
main bearings, and
other
Internal
engine
parts.
all
Is
prevented from draining
into
the
crankcase
when
the
engine
Is
stationary
by
means
of
an anti-drain valve situated behind
the
pump.
The
all
pressure
between
the
pump and
the
crank-
shaft is controlled
by
a release valve.
After
lubricating
the
engine and primary
trans-
mission,
the
all drains
through
a filter
to
the
sump,
where
it
Is
returned
by
the
scavenge pump via
the
all
cooler
to
the
all tank. The all pump has been
designed so
that
the
scavenge gears have a
greater
pumping capacity than the feed gears, thus ensuring
that
the
sump remains dry
at
all
times.
The
all feed
to
the
valve operating mechanism
Is
taken from a connection situated
between
the
scavenge side
of
the
pump and
the
all cooler.
After
lubricating
the
rocker
spindles,
the
ollisfed
into
the
rocker
boxes
by
way
of
grooves
In
the
rocker
arms,
afterwards
draining down
the
push rod
cover
tubes
and Into
the
sump, whence it
Is
subsequently
scavenged. The timing idler pinion bearing
is
lubricated
by
oil draining through a drilling
In
the
right
side crankcase.
SECTION
A4
CHANGING
THE
ENGINE
OIL
AND
CLEANING
THE
FILTERS
The
all
In
neW
and reconditioned engines should be
changed
at
250, 500 and 1,000 miles (400, 800 and
1,500 kms) Intervals during
the
running-In 'perlod,
and
thereafter
as
stated
In
Section A1.
It
Is
advisable
to
drain
the
all when
the
engine
Is
warm
as
It will fiow more readily.
When
the
oil
has
been drained It
Is
essential
that
the
wire
gauze filters
are
washed
In
paraffin
(kerosene) and
that
the
cartridge
filter
Is
replaced.
THE
SUMP
FILTER
Remove six nuts and locking washers which
secure
the
sump plate, and remove
the
plate,
two
gaskets
and
wire
gauze filter (see
Fig.
A3). Allow
the
sump
to
drain for approximately
ten
minutes. Clean
the
filter, and replace
the
gaskets. A gasket
Is
fitted
either
side
of
the
filter. Refit
the
sump
plate,
ensuring that the pocketed end
is
towards
the
rear
of
the
engine.
A6
Fig. A3. Crankcase sump filter
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