MG MGB User Manual

Fl)
THE GEARBOX (ALL
SYNCHROMESH)
Section Fb.1
GEARBOX ASSEMBLY
Removing
1.
Remove
the
engine
and
gearbox
from the
car~Secti0n
A21.
2. Remove
the
starter.
3.
Unscrew
the bolts
securing
the
gearbox
to
the
engine
and
withdraw the
gearbox.
Refitting
4.
Reverse
the
removing
procedure
in 1
to
3 and
re■ll
the gearbox with the
correct
quantity
(see
‘GENERAL
DATA’)
of
a
recommended lubricant.
Section F
b.2
REAR EXTENSION
Removing
1.
Drain
the
gearbox.
2.
Using
tool
18G
34 A
to prevent
rotation,
unscrew
the
propeller shaft ■ange
retaining
nut
and withdraw
the
■ange.
3.
UnsCrew the bolts
securing
the
remote-control housing
to
the
gearbox and
remove
the
remote
control.
4.
Withdraw the
selector interlocking
arm
and plate
assembly.
00
V
M0454
Fig. Fb.1
Rear extension setting
up
5.
Rear extension.
6.
Gasket
for
rear
extension.
7.
Gearbox
main casing.
8.
Bearing.
.
Third motion
shaft.
Rear extension.
Rear bearing circlip
groove.
Distance tube.
PP’E‘J"
A.
Depth
between
bearing face and gearbox main casingface.
B.
Depth between
rear
extension
face
and bearing ■ange.
C. Thickness of joint
washer.
D. Depth from
rear
extension face
to
distance tube.
E. Depth from
rear
extension face
to
hearing register.
Fb.2
D0845
Fig.
Fb.2
Drifting
the
■rst
motion
shaft
from the
casing
5. Unscrew the
nuts
securing
the
rear
extension
to
the
gearbox
and
withdraw
the
extension,
ensuring
that the
shims ■tted
to
the
gearbox third
motion
shaft
are
not
mislaid.
Dismantling
The following
operations
are
only
necessary
if the
hearing
or
oil
seal
are
to
be
renewed.
6.
Remove
and discard
the
oil seal.
7. Remove the
circlip
retaining
the
bearing.
8. Press the
bearing
from
the
extension.
Reassembling
The
following
procedure
must
be carried
out
when fitting
a
new
gearbox
extension
or
if
any
of
the third
motion
shaft
components
have
been changed.
9.
Calculate
the
thickness of
shims
required
between the
third
motion
shaft front
bearing,
and
the
gearbox
rear
extension
case,
as
follows:
a.
Measure
the
depth
A
between the face
of the
front
bearing
and
its
housing,
and add the
thickness
C of the
joint washer.
b.
Measure
the
depth
B
from
the
joint
face
to
the
bearing
register
face of
the
rear
extension.
c.
Fit
shims
between the
extension
and the
face of
the front
bearing
to
bring the
dimension
measured
in b
.000
to
.001
in.
(.000
to
.025
mm.)
less than
the
dimension
in
a.
Shims
of
.002
in.
(.05
mm.)
and
.004
in.
(.10
mm.) thickness
are
available.
d. Fit
the
rear
extension.
10.
Calculate
the thickness
of
shims
required
between the
distance
tube,
and the third
motion
shaft
rear
bearing
as
follows:
a.
Measure
the
depth
D
between the
rear
face of
the
extension and the
rear
face of
the
distance
tube.
MGB.
Issue2. 22802

MG MGB Specifications

General

Brand	MG
Model	MGB
Category	Automobile
Language	English