Owners Manual
AUSTIN
A40
SERVICE
MANUAL
H/1
FRONT
HUBS
AND
INDEPENDENT
FRONT SUSPENSION
GENERAL DATA
Hub Bearings
Inner R. & M. LJ
1-!,
Double Purpose Ball Journal
(Light), Size
1!
X
2!
X
i~
-in.
(31.
75x
69.
85x
17.46 mm.)
Outer R. & M.
MJ!,
Double Purpose Ball Journal
(Medium),
Size!
x2
X
i~-in.
(19.
05
X 50. 8 x
17.
46
mm.)
Castor Angle
2!
o
Camber Angle 1 o
Swivel Pin Inclination
6t
o
Swivel Pin Thrust Bearing. Oilite Washer between
two stainless steel washers.
Swivel Pin diameter (top): . 686! to . 686!-in.
(1. 743-1.744 em.)
Swivel Pin diameter (bottom): . 811! to .
811
!-in.
(2.060-2.061 em.)
Swivel Pin Back Bearing
tolerance (top)
Swivel Pin Back Bearing
tolerance (bottom) ...
Independent Front Spring
*Free Length ...
Number
of
Coils
Diameter
of
Wire
Inside diameter
of
coil
Working coils
Shock Absorber:
. 000! to . 001!-in.
(.019-.044 mm.)
. 000! to .
001
!-in.
(. 019-.044 mm.)
10.54 to 10. 64-in.
(26. 77-27.02 em.)
8
. 559-in.
(I.
42
em.)
3. 625-ins. (9.
21
em.)
6t
Armstrong hydraulic double acting.
*Note: New springs are !-in. (6.
35
mm.) longer to allow for settling.
FRONT
HUBS
To
Check for Wear
The inner
and
outer ball bearings
of
the front hub
are non-adjustable, the amount
of
thrust being deter-
mined by a collapsible distance piece. To check for wear
of
these bearings the car should be jacked until the
wheel
of
the front hub is clear
of
the ground. Then
grasp the tyre with both hands in the horizontal position
and rock the wheel sideways. Movement between the
wheel and the back plate denotes wear
of
the hub
bearings. Should a very positive movement be apparent,
the front hub bearings will need renewing.
Fig. 1. This illustration shows the front hub extrac-
tor (Service
Tooll8G
8)
in
cutaway form.
It
should
be noted that the extractor screws into position on
the hub cap thread.
Dismantling the Front Hubs
To dismantle either front hub, first jack the car until
the wheel
is
clear
of
the ground
and
then place blocks
under the independent suspension spring plate. Lower
the car
on
to the blocks.
Remove the wheel
and
the countersunk screw
holding the brake drum clear
of
the front hub assembly.
If
the drum appears to
bind
on
the brake shoes, the shoe
adjusters should be slackened.
Unscrew the hub cap, taking care
not
to lose the
fibre washer located inside the cap,
and
then extract the
H40. 290.
A.