LUBRICATION
SYSTEM-L.6
To Renew the Filter Canister
1.
Unscrew
the
canister
from the
filter
head (see
Fig.
L.12).
2.
Check
that the
threaded
adaptor
is secure in the
filter
head and
discard
the
old
canister. Clean the
filter
head.
3.
Using clean
engine
lubricating
oil,
lightly
oil the
top
seal
of
the
new
canister.
4.
Prime the
canister
with
lubricating
oil
allowing
time
for
the oil to
filter
through the element.
5.
Screw
the new
canister
on
to
the
filter
head
until
the canister seal
just
touches the head and then
tighten by hand as detailed in the
instructions
on
the canister. Where a tool
is
available, tighten to 15
Ibf
It
(2,07
kgf
m).
6.
As the
filter
canister
will
normally
be changed
at
the same time as the engine
lubricating
oil, refill
the sump
with
oil, run the engine and
check
for
oil
leaks. Recheck
the
oil level
after
running the
engine and
top
up
as
necessary.
Oil Filter Assembly
In some instances
the
setscrews
securing
the
filter
head
to
the
cylinder
block
are
enclosed
within
the
filter
head and bowl assembly as
shown
in Fig. L.11.
With
this
arrangement, the
filter
bowl
has
to
be re-
moved
before
the
filter
head can be
detached
from
the
block.
When
fitting
the
filter
head joint, ensure
that
the
holes
in the
joint
line
up
with
the
corresponding
drillings
in
the
cylinder
block.
By·Pass Valve
Should the
lubricating
oil filter
element
be
allowed
to become
contaminated
to the
extent
where the lubri-
cating
oil
has
difficulty
in passing
through
the element,
then a pressure
difference
will build
up
between the
inlet
and
outlet
sides
of
the filter assembly. When this
pressure reaches the figure
given on Page B.10, a ball
valve
will
open in the
filter
headcasting
and
allow
un-
filtered
oil to by-pass the
filter
element
to
prevent the
L11
engine
being starved
of
oil.
l12
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