MG MGB User Manual

THE
REAR AXLE
AND
SUSPENSION
A9I4SW
g
Fig. 1-1.9
The
gauge
in
position
on
the
pinion
with the
dial
indicating
a
variation
from
the
standard setting
9.
Allowance
should
then
■nally be
made
as
follows for
the
mounting
distance
marked
on
the
pinion
head
in
a
rectangular
bracket:
If the marking is
a
plus
■gure
reduce the
washer
thickness by
an
equal
amount.
If the marking
is
a
minus
■gure increase
the washer
thickness
by
an
equal
amount.
A
tolerance
of
.001 in. is
allowed
in
the thickness
of
the
washer
■nally
■tted.
TABLE
OF
WASHER
AND SHIM
THICKNESSES
.112
to
.126
in.
in
steps
of
.002 in.
Pinion
head
washer thickness
.004
to
.01'2
in.
in
steps
of
.002
in.,
plus
.020
in.
and .030
in.
Pinion bearing
preload
shims
.002
in.,
.004
in.,
and
.006
in.
"Crown wheel bearing
shims
10
to
12
lb.
in.
with-
out
oil seal;
13
to
15
lb.
in.
with oil seal
Pinion
bearing
preload
Crown
wheel bearing
pinch .002
in.
each side
2.
ADJUSTING PINION
BEARING PRELOAD
Fit
the appropriate
washer
to
the
pinion
head.
Assemble
the pinion
shaft,
bearings,
distance tube,
and
shims
to
the
gear
carrier;
■t the oil
seal
and
driving
■ange.
Shims
to
a
thickness
of
.008
to
.011
in.
(.2
to
.28
mm.)
should be used
as‘ a
starting-point
for
adjustment
of the
bearing
preload.
1-1.8
Tighten the driving
■ange
nut
gradually with
a
torque
wrench
to
140
1b.
ft. (19.34 kg.
m.)
and check
the preload
on
the
bearings
during
tightening
to
ensure
that
it
does
not
exceed
13
to
15
1b.
in.
(.15
to
.173 kg.
m.),
i.e. 3
lb.
in.
(.034
kg.
m.)
greater
than the
recommended figure
since
the oil seal
is
now
fitted. If
the preload
is
too great
more
shims
must
be
added.
If the preload
is
too
small when the
nut
is
tightened
correctly the
shim thickness
must
be
reduced.
3.
SETTING
THE CROWN
WHEEL
POSITION
1.
Before
fitting the
crown
wheel
and
differential
assembly
to
the
gear
carrier
it is
necessary
to
calculate
the
shim
thickness required
behind
each bearing
to
give
the required
pinch.
To
facilitate
the
calculation,
machining
variations
are
indicated by stamped
numbers
on
the
carrier
adjacent
to
the
bearing bores.
The dimensions
to
be
considered
are
shown
in
Fig.
H.10,
(A)
being
the
distance
from
the
centre-line
to
the
bearing register
of the
carrier
on
the
left-hand
side
and
(B) the
distance
from the
centre-line
to
the
bearing
register
of
the
carrier
on
the right-hand side.
The
(C)
dimension
is
from the
bearing register
on one
side of the
cage
to
the
register
on
the other side,
while
the
(D)
dimension
is
from the
rear
face of the
crown
wheel
to
the bearing
register
on
the
opposite
side. Any
variation
from
nominal
on
the
(A)
dimension will be
found
stamped
on
the
carrier
adjacent
to
the
bearing
bore, and
similarly with the
(B)
dimension. The
variations
from nominal
on
(C)
and
(D)
dimensions
are
stamped
on
the machined face of
the differential
cage.
Fig. H.10
The dimensions
referred
to
in the
instructions
for
differential
setting
MGB.
Issue3.
56582

MG MGB Specifications

General

Brand	MG
Model	MGB
Category	Automobile
Language	English