MG MGB User Manual

THE FUEL SYSTEM
15.
16.
17.
A9300
Fig. D.5
The rocker finger settings
on
modified rocker
assemblies
1.
Pedestal.
2. Contact
blade.
3. Outer rocker.
A
=
.035 in. (.9 mm.)
4.
Inner
rocker.
5.
Trunnion.
6. Coil
housing.
B
=
.070 in. (1.8 mm.).
components
into
the outlet
recess
in
the
following
order:
first
a
joint
washer, then
the
valve
(tongue
side
downwards),
then the valve
cover.
Assemble
the inlet valve
into
the
recess as
follows:
first
a
joint
washer, then the
filter
(dome
side
downwards),
then
another
joint
washer,
followed
by
the
valve
assembly
(tongue
side
uppermost),
then
the
valve
cover.
Take
care
that both valve
assemblies
nest
down
into
their
respective
recesses,
place
the clamp
plate
on
top
of the valve
covers
and
tighten
down
■rmly
on
to
the
body
with the
two
screws.
Replace
the inlet
air
bottle
cover
with
its
joint
washer
and tighten
down the
central
screw.
EARLY PUMPS: Place the sealing washer
in
the
bottom
of the
delivery'■ow smoothing
device
recess,
follow
this with the perforated diaphragm plate
(dome
side
downwards), then the plastic
barrier
followed by
the rubber
diaphragm. insert
the ‘0’
section
sealing
ring into
the
recess
and
ensure
that.
it
seats
evenly.
Place the
diaphragm
spring
(large
end towards the
vented
cover)
into
the
cover,
place the
spring
end
cap
on
to
the
small end
of
the
spring,
pass
the assembly
tool
through the
cover,
spring,
and end
cap,
turn
the
tool
through
90°,
and
tension
the
spring.
Finally, ■t
the
cap
and
spring
assembly
on
to
the diaphragm,
tighten
the four
retaining
screws
and
release the
assembly
tool.
LATER
PUMPS:
Place the sealing washa;
in
the
bottom
of the delivery
air
bottle
recess,
place the
plastic
diaphragm, dome
side downwards,
then
add
the ‘0’
section
sealing
ring
and tighten
down the
cap
with
its
four
screws.
BODY COMPONENTS
(type HP)
18.
Assemble the brass
outlet valve disc
to
the outlet valve
D.6
cage,
making
sure
that
the
smooth face
of
the disc
19.
faces the valve
seat,
retain it
in position
with
the
circlip,
which
must
be
located
in its
groove.
The valve
must
rattle freely when
the valve
cage
is
shaken.
Drop
the inlet valve disc,
smooth face downwards,
on
to
the inlet valve
seat
in
the body
of
the
pump,
insert
the thin
■bre
washer, drop
the outlet valve
cage
in
position
and
insert
the medium
■bre
washer, then
screw
in
the
outlet
union
and
tighten with
a
spanner.
Fit the inlet
union
and ■lter.
BODY ATTACHMENT
(type
AUF
300)
20.
21.
22.
23.
Fit the
joint
washer
to
the body, aligning the
screw
holes,
and
offer
up
the coil housing
to
the body,
ensuring
correct
seating
between
them.
Line
up
the
six securing
screw
holes, making
sure
that
the
cast
lugs
on
the coil housing
are
at
the
bottom,
and
insert
the
six
2 BA.
screws
■nger
tight. Fit the
‘
earthing
screw
with
its
Lucar
connector.
ROLLER TYPE. Carefully
remove
the
retaining
fork
from
the rocker assembly and check that the rollers
are
correctly positioned.
Tighten
the
securing
screws
in
diagonal
sequence.
BODY ATTACHMENT
(type HP)
24.
25.
26.
Place the sandwich plate
joint
gasket
on
the
face
of
the body, lining
up
the holes
in
the body and washer,
fit the sandwich plate
(concave face
to
diaphragm)
to
the gasket
on
the body,
again
lining
up
the
holes.
Offer
up
the coil housing
to
the body and sandwich
plate and
ensure
correct
seating
between
them, with
the
connections
at
the
top
and
■lter
at
the
bottom.
Line
up
the
six securing
screw
holes,
making
sure
that
the
two cast
lugs
on
the
coil
housing
are
at
the
bottom,
and
insert
the
six 2
BA.
screws
■nger tight.
Fit the earthing
screw
with
its
Lucar
connector.
4
A9076»:
Fig. D.6
The
contact
gap
setting
on
earlier-type
rocker assemblies
1_.Pedestal.
2.
Contact blade.
3.
Outer
rocker.
4.
Inner rocker.
5. Trunnion.
6.
Coil
housing.
A
=
.030 in.
(.8
mm.).
MGB.
Issue
4. 15676

MG MGB Specifications

General

Brand	MG
Model	MGB
Category	Automobile
Language	English