MG MGB - Headlamps; Removing a Light Unit; Bulb Replacement; Refitting a Light Unit

THE ELECTRICAL
SYSTEM
N
Section N.9
HEADLAMPS
The
two types
of
headlamp ■tted
have sealed-beam
units
or,
alternatively, replaceable
bulb light
units.
Variations
within the
two
basic
types
cater
for
the
local
lighting
regulations
existing
in
the
country
for
which
the
car was
produced. The
method of
retaining
and adjusting
the light
unit
together
with the
type
of
lens
and bulb
used
are
subject
to
territorial
variation.
Fig.
N.14
shows the
alternative
methods
of
retaining
and
adjusting
the light
unit
and Fig.
N. 15 the different
types
of
bulb ■ttings
used.
Removing
a
light
unit
REMOVABLE-TYPE
RETAINING
SCREW (1)
Fig.
N.14
1.
Ease
the
bottom of the
outer
rim
forward
away
from
the
lamp,
and
lift
it
off
the
retaining
lugs
at
the
top
of
the lamp.
2. Remove the
rubber dust excluder
(if
■tted).
3. Remove the
three
screws
securing
the
light
unit
retaining
plate
and withdraw
the light
unit
from
the
lamp
body.
COMBINED ADJUSTING/RETAINING
SCREW
(2)
Fig.
N14
4. Carry
out
the
operations detailed
in
l and
2.
5. Press the
light
unit
inwards
against
the
tension
of the
springs
and
turn
it in
an
anti-clockwise
direction
until
the heads
of the
screws
can pass
through
the enlarged
ends of
the
slots
in
the
retaining
plate,
then withdraw
the light
unit.
CAPT IVE-TYPE
RETAINING
SCREW
(3)
Fig.
N.
14
6. Carry
out
the
operations
detailed
in
l and
2.
7.
Slacken the three
retaining
screws
and
turn
the light
unit
retaining
plate
in
an
anti-clockwise
direction
until
the heads
of the
screws can
pass
through
the enlarged
ends
of
the
slots
in
the
retaining
plate,
then
withdraw
the
retaining
plate
and light
unit.
Bulb
replacement
CAP-TYPE
HOLDER (1)
Fig. N.15
8.
Press
and
turn
the
cap
anti-clockwise, lift
off the
cap
and withdraw
the bulb.
9. Fit the bulb
into
the re■ector
ensuring
that the
notch
in
the bulb ■ange
locates
on
the ridge
in
the re■ector.
10.
Engage
the
cap
lugs
in
the re■ector
slots,
press
and
turn
the
cap
clockwise.
SPRING CLIP
TYPE
(2)
Fig. N15
11.
Withdraw
the three-pin
socket.
12.
Disengage
the
spring
clip from
the re■ector
lugs,
swing
the
clip
up
and withdraw
the bulb.
l3.
Fit
the bulb
into
the re■ector
ensuring
that the
pip
on
the
bulb ■ange
engages
the slot
in
the re■ector.
14. Swing the
spring
clip
back,
ensure
that the
coils
in
the
clip
are
resting
on
the base of
the bulb,
and
engage
the
legs of the
spring
clip under the
re■ector
lugs.
25729
MGB.
Issue
6.
Fig.
N.15
Bulb holders
and
fixings
1.
Cap-type holder
2.
Spring clip
type.
3.
Headlamp
pilot
lamp.
4.
Sealed-beam
unit.
HEADLAMP
PILOT
LAMP
(3)
Fig.
N.15
15. Withdraw
the holder
from
the
re■ector.
16. Press
and
turn
the
bulb
anti-clockwise
and withdraw
the
bulb.
17. Locate
the
pins
of
the
bulb
in
the
grooves
in
the
holder,
press
and
turn
the
bulb
clockwise.
18. Press
the
holder
into
its
hole
in
the
re■ector.
Refitting
a
light
unit
19. Reverse
the
removing procedure,
noting
that
the
outer
rim is
re■tted
as
follows:
3.
Position
the
rim
on
the
retaining lugs
with the
cut-away portion
of
the
rim
at
the
bottom
of
the
lamp.
b.
Press
the
rim
downwards
and
inwards.
Beam
setting
The
headlamps
must
be
set
so
that
the
main
driving
beams
are
parallel
with
the
road
surface
or
in accordance
with
local
regulations.
N.19