MG MGB User Manual

THE
GEARBOX
»
F
Slide
out
the
shafts
and
remove
the forks
in
the
following order:
reverse,
fourth
and third
speed,
second and ■rst speed.
10.
If dif■culty
is
experienced
in removing
the
shafts
remove
the front
cover
and
use
a
soft
drift
to
tap
the
shafts
out
from
the
front
of
the box.
11. Remove the
nuts
and washers
securing
the front
cover
and then
remove
the
cover,
gasket,
and
the
■rst
motion
shaft
bearing shims.
Do
not
remove
the
oil
seal
from the
cover
unless
it
has
to
be
renewed.
12. Unscrew the
reverse
shaft
locating
screw
and
remove
the
shaft
and
gear.
13. Using
a
soft drift,
tap
out
the layshaft
from
the
front
of the
box
and allow the
laygear
to
rest
in
the
bottom
of the
box.
.
14. Ease
the
rear
bearing
housing
from
the
rear
of
the
gearbox
and
withdraw
the
third
motion
shaft
assembly.
15. Withdraw
the ■rst
motion
shaft from
the
front
of
the
gearbox.
A
soft
drift
may
be
used
to tap
the
shaft
from
the
inside
of the
box.
16.
Reassemble
the
laygear
on
its
shaft
and check
the
end-■oat
of
the
gear
(see
‘GENERAL
DATA’).
17.
Remove the layshaft,
laygear,
and thrust
washers.
Section F.3
DISMANTLING
AND ASSEMBLING
THE
CONTROL
TOWER
Do
not
dismantle
the control
tower
unless
worn or
broken
parts
are
to
be renewed.
1.
Remove
the ball
spring
cover
circlip
to
ease
the
tension
on
the
spring
and then
remove
the
two
change
speed lever locating
pins.
Withdraw
the
lever, and
from
it,
remove
the knob,
cover
and
spring.
/////
~
f:\\‘
=:-.~,.\\\\
A5541W
Fig.
F.1
Checking the laygearend-float
MGB. Issue4.
5335
(f
A5544W
Fig. F.2
Using
Service
tool 18G
5
to
unscrew
a
first
motion
shaft
nut.
This
nut
has
a
left-hand thread.
2.
From the
rear
of the
control
tower
unscrew
the
reverse
plunger
detent
screw
and
remove
the
reverse
plunger
detent
spring
and ball.
3.
From the side of the
tower
remove
the
reverse
plunger
locating
pin
and
retain
the
plunger and
spring
that
will
be released from
inside the
tower.
Assembly
is
a
reversal
of
the
dismantling
sequence,
but
care
must
be
taken
to
ensure
that the front
and
rear
selectors
are
correctly
lined
up
and that the
clinch bolts
pass across
the
■ats
on
the
remote-control shaft.
When ■tting
a new
pin
to
retain
the
reverse
selector plunger
ensure
that
the plunger
is
depressed suf■ciently
enough
to
permit
the
pin
to
engage
the ■ats
on
the plunger.
Section
F.4
DISMANTLING
AND ASSEMBLING
THE REAR EXTENSION
1. Remove
the
rear
selector
lever clamp bolt, lever,
and
the Woodruff
key
and withdraw the
shaft from
the
rear
extension.
Do
not
dismantle the
rear
extension
any
further
unless the
oil
seal and/
or
bearing
has
to
be
renewed,
in
which
case
proceed
as
follows.
2.
Using
Service tool 18G
389
and 18G
389
C,
remove
the
rear
oil seal.
3.
Remove the
rear
extension
bearing circlip and
press
out
the
bearing.
Assembly
is
a
reversal of the
dismantling
sequence.
If
the
bearing
and/or
oil seal have/has
been removed,
press
in
the
new
bearing and
secure
it
with
the
circlip, and,
using
Service
tool
18G
134 and adaptor 18G 134
N, ■t
the
new
oil seal.
-
F.5

MG MGB Specifications

General

Brand	MG
Model	MGB
Category	Automobile
Language	English