MG MGB User Manual

THE
HYDRAULIC DAMPERS
GENERAL
DESCRIPTION
The
hydraulic dampers
are
Armstrong
double-acting-type
in
which
resistance
is
offered
to
the
compression
and
to
the
recoil of the
front
suspension
coil
and
rear
leaf
springs.
The
front dampers
are
bolted
to
the
front
suspension
cross-member
above the
coil
spring
seats.
The damper
arms
are
connected
to
the
upper
swivel
pin
link.
The
rear
dampers
are
bolted
to
the body
rear
side-members
and
are
connected by
a
link
to
the
rear
axle.
Section L.1
MAINTENANCE
The
maintenance
of the hydraulic dampers,
when
in
position
on
the
vehicle,
is
con■ned
to
examination
for
leakage and
examination
of the anchorage
to
the chassis
to
ensure
that the
fixing bolts
are
tight.
No
adjustment
of the
hydraulic dampers is
required
or
provided. They
are
accurately
set
before leaving
the manufacturer
to
give
the
amount
of damping
most
suitable for the
car.
Any
attempt
to
dismantle the
assembly will
seriously affect the
operation
and performance.
.
The
dampers
are
topped
up
by
removing
the ■ller plug and
■lling
up
to
the bottom
of
the ■ller plug hole. Use
Armstrong
Super
(Thin) Shock Absorber
Fluid
No. 624.
(If
this ■uid
is
not
available,
any
good-quality mineral oil
to
speci■cation S.A.E.
20W
should be used, but
this
alternative
is
not
suitable for low-temperature
operation).
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A5447W
Fig.
L.l
The
front
hydraulic damper
filler
plug
Before
removing
the ■ller
cap,
which
is
located
on
the
top
of the damper, carefully
wipe
the
exterior,
as
it is
of
utmost
importance
that
no
dirt whatever
enters
through the ■ller
hole.
On
no
account
neglect
the
operation
of
topping
up
the
damper ■uid because
if the
low-pressure
chamber of the
unit is
allowed
to
become
empty,
air
will
enter
the
pressure
cylinders and the
action
of
the damper will
be
impaired.
Access
to
the
rear
dampers
is
obtained
by
removing
the
rubber
plugs
in
the
rear
■oor
panel adjacent
to
the
battery
cover.
MGB.
Issue2. 5335
ll
ill/W
‘7
A9063W
Fig.
L.2
A
rubber
plug
removed
from the
rear
floor panel
to
give
access
to
the
rear
hydraulic damper
filler plug.
Section
L.2
REMOVING
AND
REPLACING
THE DAMPERS
Front
Jack
up
the
car
under the
lower
wishbone
spring
pan
until
the wheel
is
clear of the
ground.
Remove the wheel and
take
out
the
swivel
pin
top
pivot
bolt. Swing
out
the hub
unit
clear
of the
upper
wishbone
and
support
it
on a
suitable
stand
to prevent
straining
the
brake
hose.
Unscrew the four
nuts
holding the
damper
to
the
cross-member.
Rear
Jack
up
the
rear
of
the
car
below the axle
or
rear
springs
and
remove
the
rear
wheel.
Remove the
nut
and
spring
washers
securing
the damper
arm
to
the bracket
on
the
rear
spring.
Remove the
nuts,
spring
and
■at
washers from the
two
bolts
securing
the
damper
to
the side-member,
and
withdraw the
damper.
NOTE—When handling hydraulic
dampers
that have been
removed
for
any purpose,
it is
important
to
keep the
assemblies upright
as
far
as
possible, otherwise air
may
enter
the
operating
chamber and result
in
free
movement.
Replacement
is
a
reversal
of
the
above procedure;
ensure
that the
servicing
bolts
are
tightened
to
the
torque
■gure
given in
‘GENERAL
DATA’.
Section
L.3
TESTING
THE DAMPERS
If the hydraulic
dampers do
not
appear
to
function
satisfactorily, the
resistance
may
be roughly checked by
bouncing each
comer
of the
car up
and down.
A
uniformg
movement
indicates
that
no
attention is
required, but if the
,
resistance is erratic
or
free
movement
of ,the
car
is
felt the
damper should be removed for checking and
topping
up.
L.3
‘

MG MGB Specifications

General

Brand	MG
Model	MGB
Category	Automobile
Language	English