MG MGB User Manual

Fb
THE GEARBOX (ALL SYNCHROMESH)
Refitting
9.
Reverse
the
removing
procedure
noting
the following:
a.
Use
a
new
gasket when refitting
the
cover;
ensure
that all
traces
of the
old gasket
are
removed from
the
cover
and gearbox jointing
faces before
fitting the
new
gasket.
b.
Check
that the
first
motion
shaft
bearing
shims
are
correctly
positioned.
Section Fb.4
SELECTOR RODS AND
FORKS
Removing
1.
Remove
the
rear
extension~Section Fb.3,
1
to
3~or
the
overdrive
adaptor—Section Fc.1.
2.
Unscrew
the
side
cover
retaining
bolts and
remove
the
cover.
3.
Remove
the
selector detent plunger plugs
and
springs.
4.
Slacken the locknuts
on
each of
the selector fork
retaining
bolts and
remove
the
bolts.
5.
Withdraw the
selector rods and
remove
the
selector
forks.
Refitting
6. Reverse
the
removing
procedure,
noting
the following
points:
a.
Clean
any
burrs from
the rods
at
the fork
attachment
points
before
refitting the
rods.
b. Check that the
detent plungers
are
clear
of the
holes
before
fitting
the rods.
Section
Fb.5
REVERSE IDLER GEAR
Removing
1.
Remove
the
rear
extensionisection
Fb.3,
1
to
3—or
the
overdrive
adaptor—
Section
F
cl.
2.
Remove
the
selector rods
and forks—Section
Fb.4,
2
to
5.
3.
Knock back
the
locking
tab
on
the shaft
retaining
bolt
and
remove
the
bolt.
4.
Remove the
shaft
and
withdraw the
gear.
Inspection
5.
Inspect the
shaft for
signs
of
excessive
wear; renew
the
shaft
if
necessary.
6.
Examine
the
gear
teeth
for
wear
and damage;
renew
Fb.4
9:...
the
gear
if
necessary.
7. Inspect the
gear
bushes
for
signs
of
excessive
wear;
worn
bushes
may
be removed and
new
bushes
pressed
in.
Refitting
8. Reverse the
removing procedure
in 1
to
4
using
a
new
locking
washer
on
the shaft
retaining
bolt.
Section Fb.6
FIRST
MOTION
SHAFT
Removing
1.
Remove the
rear
extensioniSection Fb.2,
1
to
5.
2.
Remove the
front
cover—Section
Fb.3,
1
to
3.
3.
Remove the
selector rods
and
forks—Section
Fb.4,
2
to
5.
4. Remove
the
reverse
idler
geariSection Fb.5,
2
to
4.
5.
Carefully drift
the layshaft
from the
gearbox.
6. Check that
the
laygear teeth
are
clear of
the
first
motion
shaft
gear
teeth.
7. Using
a
soft
metal drift
registering
against
the
bearing
outer
track, carefully
drift the shaft
assembly forward
from
the
gearbox.
Dismantling
8.
Withdraw
the
needle-roller
bearing
from
inside the
rear
end
of the
shaft.
9.
Tap back
the locking
tab
on
the
bearing
retaining
nut
10.
Fit
tool 18G
49
onto
the
nut
and clamp the shaft
in
a
soft-jawed
vice.
Fig. Fb.5
First
motion shaft
bearing
A. Removing
the
bearingfrom the shaft.
B. Refitting
the bearing.
MGB.
Issue
2.
22802

MG MGB Specifications

General

Brand	MG
Model	MGB
Category	Automobile
Language	English