MG MGB User Manual

THE
GEARBOX
10.
11.
12.
’//////////I
“W
‘
yaw/I’m
A5545VI
‘
Fig. F.7
Assembling
a
selector
shaft,
using
Servicetool
ISO
4
pick
up
the
thrust washers
and laygear.
The washers
are
available
in
four
thicknesses
as
follows:
.154
to
.156
in.
(3.81
to
3.96
mm.).
.157
to
.159
in.
(3.95
to
4.03
mm.).
.160
to
.161
in.
(4.06
to
4.08
mm.).
.163
to
.164
in.
(4.13
to
4.16 mm).
Fit the ■rst
motion
shaft
assembly
to
the
gearbox.
Insert
the
third
motion
shaft from
the
rear
of
the
box,
use
the
gearbox
extension
gasket
to
align
the dowel
in
the
bearing housing,
enter
the
spigot in
the first
motion
shaft,
and push
home the
shaft
and bearing
housing.
Using
Service tool
ISO 471,
■t
the layshaft
to
the
laygear
and
ensure
that the
cut-away
end
of
the shaft
faces forward.
Assemble the
reverse
gear
and shaft
and
secure
the
shaft with
the locating
screw
and
a
new
tab
washer.
Lock the
screw
with the
washer.
Re■t
the ■rst
motion
shaft
bearing shims,
align the
step
on
the
end of the layshaft
with the
inside edge of
the front
cover,
and,
using Service tool
18G 598, ■t
the front
cover
as
described
in
Section F.12.
Assemble the clutch withdrawal
lever with
its
bolt and
stiffnut.
.
Bolt the shaft locating
block
to
the
rear
face
of
the
gearbox
and
insert
the three
springs and balls
into
the
block.
Assemble the
selectors
to
the shafts
and
secure
them
with their
locating
screws.
Lock the
screw
heads
to
the
selectors with
new
locking
wire.
Using
Service tool 18G
41,
depress the
springs and
balls
in
the locating
block
and
pass
the shafts
through
the block.
Position the
gear
change forks
in
the
box
in
the
following
order:
reverse,
■rst
and
second speed, third
and
fourth
speed.
Fit the
distance
piece
to
the
third
and
fourth
speed
shaft,
push the shafts
through the forks,
align the
holes
in
the
shafts
.and
forks,
and
secure
them
with the
fork
locating
screws.
Tighten
the locknut
on
each
screw.
13. Replace the
gearbox
side
cover
and gasket.
14.
Place
the third
motion
shaft
distance
piece
on
the
shaft
and
the
extension gasket
over
the
studs
on
the
rear
face of
the
gearbox.
15. Fit the
rear
extension
to
the
gearbox
and
engage
the
rear
extension
remote-control shaft
in
the front
selector
and
the
dowel
on
the
third
motion
shaft
bearing
housing
with
the hole
in
the
extension.
16.
Secure
the
selector
with
its
Woodruff
key
and
pinch-bolt
and
replace the
extension side
cover
and
gasket.
17. Re■t
the
speedometer
drive
pinion,
drain
plug,
dipstick,
and
rear
joint ■ange.
18. After
re■tting
the
gearbox
to
the
vehicle
replace
the
control
tower
and
its
gasket
and
■ll
the
box
with
clean
oil.
Section
F
.1 l
FITTING
REPLACEMENT
BUSHES
When ■tting
replacement
bushes
to
the
reverse
gear,
the
clutch
withdrawal
fork,
and the third
motion
shaft
remove
the old bushes
and
■t
the
new ones
as
follows.
Reverse
gear
Press
the
new
bush
into
the
gear
from
the small
end of
the
gear
until the
end
of
the
bush
is
■ush
with
the
face
of the
small
end.
Finish
to
an
internal diameter
of
between
.6255
and
.6265
in.
(15.8
and
15.9
mm.)
concentric
with the
gear
teeth.
Clutch
withdrawal fork
Press
in
the
new
bush
and ■nish
to
an
inside diameter
of
between
.4996 and
.‘5004
in.
(12.6
and
12.7
mm.).
l/l/llll/IIM
AD1403A
Fig.
F.8
Using
tool 18G
471
as
a
pilot when
installing the
layshaft
1. Pilot.
2. Layshaft.
MGB.
Issue4.
1329

MG MGB Specifications

General

Brand	MG
Model	MGB
Category	Automobile
Language	English