MG MGB User Manual

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Ha

THE

REAR

AXLE

AND

REAR

SUSPENSION

GENERAL

DESCRIPTION

The

rear

axle

assembly

is

of the

semi-■oating

type.

Adjustment

to

the bearing

is

by

means

of

spacers,

as

also

is

the

position

of the

pinion

in relation

to

the

crown

wheel

and

the

backlash

between

the

gears.

Suspension

is by

semi-elliptic

leaf

springs, rubber-mounted,

and the

shackles

are

fitted

with

rubber

bushes.

Section

Ha.l

LUBRICATION

Oil

level

-

Check

the

level,

and

top

up

if

necessary.

The

filler

plug

is

located

on

the

rear

of

the

axle

and also

serves

as an

oil

level

indicator.

After

topping

up

allow

time

for

any

surplus

oil

to

run

out.

This

is

most

important;

if the

axle

is

overfilled,

the

oil

may

leak

through

to

the

brake

linings

and lessen

their

efficiency.

NOTE—It

is

essential that

only

Hypoid

oil be

used.

Draining

The

most

suitable

time

for

draining

is

after

a

long

journey

while

the

oil

is

still

warm.

Clean

the

drain

plug

before

it is

replaced

and

tightened.

Refill

the

axle

with

fresh

oil.

Section

Ha.2

AXLE

UNIT

Removing

Raise

the

rear

of

the

car.

Mark

the

propeller

shaft

driving

■anges

so

that

they

may

be

replaced

in

their

original

relative

positions.

Remove

the

four

bolts

and

self-locking

nuts

and release

the

rear

end of

the

propeller

shaft

from

the

axle.

Remove

the

nuts

and

spring

and ■at

washers

securing

each

end of

each

check

strap to

the

anchor

pins

on

the

axle

and

remove

the

check

straps.

Remove

the

split

pin

and clevis

pin

securing

the

brake

cable

to

each

brake

operating lever.

Remove

the

set

screw

securing the

hand

brake

cable

clip

to

the

axle

casing.

Remove

the

self-locking

nut

and large

■at

washer

securing

the

brake

balance

lever

to

the

pivot

on

the

axle

casing.

Remove

the

nut

and

spring washer

securing

the

lower

end

of

each

damper

link

to

the

rear

spring clamp

plate.

Unscrew

the

brake fluid

supply

pipe

union

and release

the

,

■exible

pipe

from

the

battery

box

support

bracket.

Release

the

exhaust

pipe

from

the

exhaust

manifold

and

the

supporting brackets

and

lower

the

exhaust

pipe

assembly.

Remove

the

nut

and

spring washer

from

each

of

the

spring

front

anchor

pins.

Support

the

axle

casing

and

remove

the

rear

shackle

plates,

brackets,

and

rubbers.

Lower

the

axle

support

until

the

axle

and

spring assembly

rests

onthe

road wheels.

Withdraw

the

front

anchor

pins and roll the

assembly

from

beneath

the

car.

Refitting

Reverse

the

removal

procedure

when

refitting.

Bleed

and

adjust

the

brakes

(see

Section

M).

Section

Ha.3

HUB

AND

AXLE

SHAFT

Removing

’

Jack

up

the

car

and place

blocks

under the

spring

as

close

as

possible

to

the

axle.

Remove

the

wheel.

Release

the

hand

brake.

Remove

the

two

countersunk

screws

(disc

wheels)

or

the

four

nuts

(wire

wheels)

locating

the

brake-drum

and

tap

it

from

the hub.

It

may

be

necessary

to

slacken

off

the

brake

adjusters

slightly

if

the

shoes

hold

the

drum.

Remove

the

split

pin,

unscrew

the

slotted

axle

shaft

nuts

and withdraw

the

hub.

Remove

the

clevis

pin

securing

the

brake

cable

to

the

operating

lever,

and disconnect

the

hydraulic

pipe

from

the

wheel

cylinder.

Remove

the

backplate.

Remove

the

oil

seal collar,

bearing

hub

cap

and

oil

seal from

the

axle shaft.

Remove

the

axle

shaft

using

impulse

extractor

18G

284 with

adaptor

18G

284

D

and

press

the

hearing

from

the

shaft.

Refitting

Repack

the

bearings

with

grease

before

refitting.

Reverse

the

removal

procedure,

using tool

18G

1067

to

drift

the

axle

shaft

into

position. Lubricate

and

fit

a

new

oil

seal,

lip facing

inwards. Re■t

the

oil

seal

collar

and

bearing

hub

cap.

Tighten

the

axle

shaft

nut to

the

torque

figure

given

in

‘GENERAL

DATA’.

Bleed

and

adjust

the

brakes

as

in Section

M.

Section

Ha.4

RENEWING

THE

PINION

OIL

SEAL

Removing

1.

Raise

and

support

the

rear

of the

car.

2. Remove

the

rear

road wheels

and brake

drums.

3. Drain

the

rear

axle.

4 Mark

the

propeller

shaft

and

pinion

■anges

to

ensure

correct

reassembly

and

disconnect

the

propeller

shaft.

5. Using

18G

207

(see

Fig.

Ha.5)

measure

and

record the

torque required

to

rotate

the

pinion.

6.

Using

18G

34

A

to

prevent

the

pinion from

rotating,

remove

the ■ange

retaining

nut

and

washer,

and

withdraw

the

pinion ■ange.

'

7. Extract

and discard

the

oil

seal.

Inspection

8. Examine

the

pinion ■ange

for

damage,

paying

particular

attention

to

the

oil

seal

track

area.

Refitting

9. Grease

the

periphery

and

sealing

lip

of

the

new

oil

seal

and

fit

the

seal ■ush

with

the

axle

casing.

MGB.

IssueS.

91427

Table of Contents

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MG MGB Specifications

General

Brand	MG
Model	MGB
Category	Automobile
Language	English

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