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Perkins 4.99 - Fuel System Components; Fuel Oil Filters and Element Renewal; Fuel Lift Pump Testing

Perkins 4.99
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FUEL
OIL
FILTERS
The
element
in
this
f:lter
is
of
the
paper
type
ane.
therefore
no
attempt
should
be
made
to
clean
it. Its
life
will
be
governed
by the
quality
and
condition
of
the
fuel
passing
through
it.
but
under
average
con-
ditions
the
element
should
be
renewed
in
accordance
with
the
recommended
Periodical
At:entions
given
on
Page
C.2.
This
period
would
naturally
be
reduced
if it
was
apparent
from
the
condition
of
the
element
if
removed
and
inspected.
that
conditions
warranted
it.
I On early engines
the
filter
element
is
contained inside
I a
filter
bowl,
(Fig. N5). On later engines
the
filter
I element
is
situated
between
the
filter head and
the
I
bottom
cover, (Fig. N6).
To
Renew
the
Filter
Element
1 .
2.
3.
Clean
the
outside
of
the
filter.
Release
the
setscrew
in
the
centre
of
the
filter
head.
Lower
the
filter
bowl,
(Fig. N5) or
the
bottom
cover, (Fig.
N6)
depending on
which
type
of
filter
is
used and discard
any
fuel
together
with
the
used
filter
element.
.J
J
J
1
4.
Clean
the
inside
of
the
filter
head and
the
inside
of
the
filter
bowl
or
bottom
cover.
5.
6.
7.
8.
Inspect
the
seals and
renew
them
if
they
are
damaged.
Place
the
new
filter
element inside
the
bowl
or
put
the
bottom
cover on
the
bottom
of
the
new
filter
element.
Offer
up
the
filter
bowl
or element
assembly
to
fit
centrally on
the
seal in
the
filter
head.
Hold in
this
position
whilst
the
securing
setscrew
is
located and tightened. Do
not
overtighten.
Prime
the
fuel
system
as
detailed in page N.
11.
FUEL
LIFT
PUMP
the
in
Position
1.
Disconnect
the
outlet
pipe
(lift
pump
to
filter)
leaving
a
free
outlet
from
the
pump.
N5
AIR CLEANERS AND FUEL
SYSTEM-N.3
N6
2.
Rotate
the
engine
and
note
if
there
is a
well
defined
spurt
of
fuel
from
the
outlet
port
once
every
two
eng
ine
revolutions.
N7
NOTE:
As
an
alternative
the
pump
may
be
operated
by
means
of
the
hand
primer
as
shown
in Fig. N.7,
which
should
give
the
same
result
every
time
the
priming
lever
is
operated.
However
should
the
engine
happen
to
have
stopped
in
such
a
position
that
the
eccentric
operating
the
lift
pump
is in
the
maximum
lift
position,
then
it
will
not
be
possible
to
operate
the
hand
primer
properly.
If
such
a
condition
arises
the
remedy
is
to
rotate
the
engine
one
complete
revolution.

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