MG MGB User Manual

THE REAR
AXLE
AND
REAR
SUSPENSION
.,
\"
A593|A
Fig. Ha.1
Axle stretcher 18G 131
C
10.
Re■t the
pinion
■ange
and washer.
11.
Screw
on
the
retaining
nut,
tightening
the
nut
gradually
until
resistance is
felt.
12.
Rotate the
pinion
to
settle the
bearings and
measure
the
torque
required
to rotate
the
pinion.
If the
reading
obtained
is
less than
that
recorded
in
Operation
5,
before
the
seal
was
removed; tighten
the
nut
A VERY
SMALL AMOUNT,
resettle the
bearings
and recheck
the
torque
reading. Repeat this
procedure
until
a
reading equal
to
that
recorded
in
Operation
5
BUT NOT
LESS THAN '4
to
6
lb.
in.
(0.04
to
0.07 kg.
m.)
is obtained.
e.g.
Reading
in
Operation
5
=
9
lb.
in.
(0.10
kg. m.).
Adjust
torque to
this
figure
or
Reading
in
Operation
5
=
01b.
in.
Adjust
torque to
4
to
6 1b.
in.
(0.04
to
0.07
kg.
m.).
CAUTION. Preload
build
up
is rapid, tighten the
nut
with
extreme
care.
IF AN ORIGINAL
TORQUE
READING,
in
excess
of
6
lb.
in.
(0.7
kg. m.)
is exceeded,
THE
AXLE
MUST
BE DISMANTLED
AND A
NEW COLLAPSIBLE
SPACER
FITTED.
Section
Ha.5
DIFFERENTIAL AND PINION
Removing
the differential
Drain and
remove
the axle from the
car
(see
Section
Ha.2).
,
Remove the
axle
shafts
and wheel
hubs
(see
Section Ha.3).
Remove the
differential
cover.
Mark
each differential
bearing
cap
before
removal
to
ensure
correct
replacement
unscrew
the
two
bolts
and withdraw
both
caps.
Ha.4
Before the differential
assembly
can
be withdrawn
the axle
case
must
be
stretched
with
Service tool 18G
131
C. When
using
this
tool tighten the
turnbuckle
one
■at
at
a
time
until the differential
unit
can
be
prised
out.
Each ■at
on
the
turnbuckle
is
numbered
to
provide
a
check
on
the
amount
turned
on
the
buckle. Prise
the differential
assembly
out
with
two
levers,
one on
each
side
of
the
differential
case
opening, using
suitable
packing between
the
levers and the
gear
carrier, and
ensure
that
no
leverage
is
placed
upon
the
axle stretcher.
NOTE—To
prevent
the axle
case
being
permanently
damaged,
it,
must
not
be
stretched
any
more
than
is
absolutely
necessary.
Maximum stretch
is
0.012
in.
(.31
mm.)
9
■ats.
Release the stretcher.
Dismantling
Bend back the locking
tabs and
remove
the
crown
wheel
securing
screws.
Remove the
crown
wheel
from
the
differential
cage.
Drive
out
the
pinion
pin
peg
and
remove
the
pin.
Turn
the
differential
wheels
by hand
until the
differential
pinions
are
opposite
the
openings in
the
differential
cage,-
remove
the
differential
pinions and the
thrust
washers
■tted
behind
them.
Remove
the
differential
Wheels
and their thrust
washers.
Should
it
be
necessary
to
withdraw
the
differential
inner
bearing
races,
Service
tool 18G
47
C,
adaptor
18G
47 AK
and
adaptor
plug 18G
47 AR
must
be
used.
Reassembling
Use
Service
tool 18G
134 and
adaptor
18G
134 CM
to
replace
the
differential
bearings.
Fit the differential
wheels
with the thrust
washers
in
position.
Insert
the
differential
pinions
through the
opening in
the
differential
cage
and mesh
them
with the
differential
wheels.
Hold the
pinion
thrust
washers
in position and
install the
pinion pin.
Line
up
the
pinion
pin
with
the hole
in
the
differential
cage
and fit the
pinion pin
peg.
Bolt the
crown
wheel
to
the differential
cage
but do
not
knock
over
the
locking
tabs. Tighten the
bolts
to
a
torque
wrench
reading of
60
to
65 lb. ft. (8.3
to
8.9 kg.
m.).
Mount
the
assembly
on
two
‘V’ blocks
and check
the
amount
of
run-out
of
the
crown
wheel,
as
it is rotated, by
means
of
a
suitably
mounted dial
indicator. The
maximum
permissible
run-out
is .002
in.
(.05
mm.)
and
any
greater
irregularity
must
be
corrected.
If
there
is
excessive
run-out,
detach the
crown
wheel
and
examine
the
joint
faces
on
the
■ange of
the differential
cage
and
on
the
crown
wheel for
any
particles of
dirt.
When the
parts
are
thoroughly
cleaned
it is
unlikely
that
the
crown
wheel
will
not
run
true.
Change the
position
of
the
crown
wheel
on
the
differential
cage
to
correct
any
misalignment.
Tighten the
bolts
to
the
correct
torque
wrench
reading and
knock
over
the
locking
washers.
MGB.
Issue
2.
80619

MG MGB Specifications

General

Brand	MG
Model	MGB
Category	Automobile
Language	English