MG MGB User Manual

K
THE
'FRONT
SUSPENSION
GENERAL
DESCRIPTION
The
independent
front suspension
is
of the wishbone
and
"coil
type
in
which the suspension
units
are
mounted
one on
each end
of the
cross-member
assembly. The
cross-member
is
rubber-mounted
and bolted
to
the body
side-members.
This
design allows
the
front
suspension
to
be
removed
as a
complete
unit.
The
cross-member
embodies
two
mounting
brackets for the
steering
rack,
a
bracket
at
each end
for the bump
rubbers,
a
towing-eye
plate,
two
front brake hose
brackets,
and
two
brake
pipe
clips.
Each
suspension
unit
comprises
a
coil
spring,
a
swivel
axle
unit,
a
lower
wishbone
assembly,
and
an
upper
assembly
formed by
the
arms
of
the
double-acting
dampers
mounted
on
top
of the
cross-member.
The
lower
arms
are
rubber-mounted
on a
pivot
that
is
bolted
to
the
cross-member;
the
outer
ends
of the
arms
are
bolted
to
the lower
end
of the
swivel
pin.
The
outer
ends of
the
shock
absorber
arms are
secured
to
the swivel
pin
upper
trunnion
link by
a
fulcrum
pin
and
tapered rubber
bushes.
A
spring
pan
secured between
the lower wishbone
arms
supports
the
coil
spring;
the
upper
end
of
the
spring is
located by
a
spigot
bolted
to
the under side
of
the
cross-member.
Both
suspension
units
may
be
interconnected
by
a
rubber-mounted anti-roll bar.
A
704“:
Fig. K.1
Cross—section
of
a
swivel
axle and
hub
K.2
Section
K.l
LUBRICATION
Lubrication
nipples
are
provided
on
the
top
and bottom
swivel
pin
bushes and
in
the
base
of
the
swivel
pin.
Each
nipple should be
charged with
grease.
Section
K.2
FRONT HUBS
Disc
wheels
The front hubs
are
supported
on
taper-roller bearings
that
are
mounted
on
the
swivel axles. Four wheel disc
studs
are
pressed
into
the hub,
and the brake disc
is
secured
to
the
hub by
nuts
and bolts.
An
oil seal
is
■tted
to
the
inner
end
of the hub
and
a
spacer
and shims
are
interposed between
the
inner
and
outer
bearing.
The
assembly
is
retained
on
the
swivel axle by
a
washer,
nut,
and split
pin,
and the
outer
end
of the
hub
is
closed by
a
grease-retaining
cap.
Wire
wheels
The
construction
of the
wire
wheel
hubs
is
similar
to
that
of the disc wheel hubs.
Externally the
outer
end
of the hub
takes
the form of splinesz,
and the
grease
retainer
is
■tted
inside
the hub
to
close
an access
hole
to
the
split
pin.
The
outer
edge of the hub
is
threaded
externally
to
permit
the
fitting
of
a
hub
cap.
NOTE—The
right-hand hub
is
threaded
right-hand and the
left-hand hub is
threaded left-hand.
Removing
a
hub
To
remove
a
hub apply
the hand
brake,
lift
and
support
the
front of the
car,
and
remove
the
road
wheel.
Remove the
two
studs
securing
the
brake calliper
to
the
swivel axle and
support
the calliper
clear
of the hub
assembly.
Withdraw
the
grease
retainer
and
remove
the
split
pin
from
the stub
axle
nut.
Unscrew
the
nut.
Using Service
tool 18G
363
(wire
wheels)
or
186 304
with
adaptors
ISO 304 B
and 18G
304 J
(disc
wheels), withdraw
the hub and
disc
assembly.
From the hub
withdraw
the bearing
retaining
washer,
outer
bearing,
shims,
spacer,
inner
bearing,
oil seal
collar,
and oil
seal.
The
outer
bearing
races
should
be
left
in
the
hub
unless
they
are
to
be
renewed.
Inspection
of bearings
Wash the
bearings
in
paraf■n and
thoroughly dry them
in
an
air
blast
or
with
a
non-■uffy cloth.
Examine
the rollers
for
chips,
pitting,
or
other damage and
for
security in
their
cages.
Examine
also the
inner
and
outer
races,
Bearings
damaged
or
suspect
must
be
renewed.
After examination
immerse
the bearings
in
mineral oil.
MGB. Issue
5.
91427

MG MGB Specifications

General

Brand	MG
Model	MGB
Category	Automobile
Language	English