MG MGB User Manual

Fd
THE AUTOMATIC
GEARBOX
nib-
L2
Ll
"
_—>
A93
99A
Fig. Fd.5
Starter inhibitor and
reverse
light switch
1. Starter operative.
2.
Starter inoperative.
3.
Starter
inoperative,
reverse
light
on.
3.
Connect
a
test
bulb and
battery
across
the
starter
terminals and another
across
the
reverse
light
terminals.
4.
Select ‘DZ ‘L1’
or
‘LZ’.
5.
Fully
unscrew
the
switch from the
casing,
then
screw
it in
until the
reverse
light
contacts
open.
Mark the
position
of
the switch relative
to
the
casing.
6. Screw the switch
in
until
the
starter
inhibitor
contacts
make, and mark the
switch
position.
7.
Unscrew
the switch
to
the
midway
point
between the
two
markings.
8. Tighten the switch
locknut
and
re-connect
the
wiring.
9.
Check
that the
switch functions
correctly; if
the
starter
operates
in
any
position
other
than ‘P’
or
‘N’,
or
if
the
reverse
lights fail
to
operate
only
in
‘R’,
renew
the switch.
Down-shift and throttle
valve cable
10.
Carry
out
the
instructions
given in
Section Fd.7,
l
to
8.
Manual selector linkage
11.
Carry
out
the
instructions
given in Section
Fd.1,
1
to
5.
Front
brake band
12.
Drain the
gearbox,
noting
that
a
quantity
of ■uid
will
remain in
the
converter.
13. Remove the
screws
securing
the
gearbox
oil
pan
and
remove
the
pan.
14. Slacken
the front
servo
adjusting
screw
locknut,
move
the
servo
lever
outwards
and
place
the
spacer
of
tool
ISO
678
between the
adjusting
screw
and
the
servo
piston
pin.
15.
Using
tool ISO
678 with
torque
screwdriver
180
681.
tighten
the
adjusting
screw
to
a
torque
of
10
lb.
in.
(.115
kg. m.).
16. Tighten the
adjusting
screw
locknut
to
the
torque
■gure
given in
‘GENERAL
DATA’.
'
Fd.16
17.
Refit
the
oil
pan
and
■ll
the
gearbox
with
■uid
to
the
correct
level.
Rear brake
band
18. Slacken
the
locknut
on
the
external adjusting
screw.
19.
Using
a
torque
wrench
tighten the
adjusting
screw
to
a
torque
of
10
lb.
ft.
(1.4
kg. m.)
then
back off
the
screw
one
complete
turn.
20.
Tighten
the
locknut
to
the
torque
■gure
given
in
‘GENERAL
DATA’.
Section Fd.9
AIR PRESSURE
TEST
Air
pressure
may
be
used
to
check
that the
clutch
and
brake
bands
are
operating.
These
checks
can
be
made
with
the
gearbox
installed
in
the
car or on
the
bench.
1.
Drain the
transmission,
noting
that
a
quantity
of
■uid
will
remain
in
the
torque
converter.
2.
Remove the
valve
bodies
assembly—Section
Fd.13,
1
to
6.
Front clutch
and
governor
feed
3.
Apply
air
pressure
into
passage
1
of
the
casing,
noting
a
thump,
indicating that
the clutch
is
functioning;
maintain air
pressure
for
several
seconds
to
check for
leaks. If
the
transmission
has
been
removed:
a.
Verify the
clutch
operation
by
turning
the
input
shaft
while
applying
the
air
pressure.
b. Remove
the
extension
housing,
rotate
the
output
shaft
so
that
governor
weight
is
at
the
bottom of
the
assembly,
and
check
that the
weight
moves
inwards when
air
pressure
is
applied.
\
{WV/■
w
/
/
A6l488
Fig.
Fd.6
Adjusting
the
front
brake
band
using
tool ISO
678
and
ISO
681
MGB.
Issue 1.
15676

MG MGB Specifications

General

Brand	MG
Model	MGB
Category	Automobile
Language	English