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GROUP 64
STEERING GEAR
DESCRI PTI
O
N
MECHANICAL STBERING G'EAR
The design of the steering gear
is
shown
In
Fig. 6-29.
Steering wheel movement is transmitted to the wheels
via the steering column
(S),
steering
box
(3), pitman
arm
(10),
tie rod
(11),
steering rods
(8
and
13)
and
steering knuckles
(7
and
10).
The relay arm
(Fig.
6-42) is supported on a pin
inrhe
bracket by means of a bush. The bush consists of
three parts, a rubber bush, an outer sleeve
of
sheet-
metai and
inside
a spacer
sleeve.
The
outer
sleeve
has
a press fit
in
the
hole
of the relay arm.
When
the
relay arm
is turned,
movement takes place
between
the outer sleeve and the rubber bush, the intervening
space of which
has been lubricated
for
life.
The
bear-
ing thus requires no
lubrication.
The
upper
and
lower
sections of
the
steering column
(S,
Fig. 6-29) are connected
by means of
a
universal
joint.
The
lower
section
is mounted to
the steering
6 :
16
box by means of aflange
(4)
with rubber disc. Should
a frontal collision involving the indentation of the
front end occur, it is possible for the
lower
section of
the steering column to break away and thus prevent
the
steering wheel from being forced
backwards-up
-
wards.
A splined joint with c/amping sleeve on the
upper section of the steering column permits axial
compression during powerful impact and so assists in
the above steering column
breakage.
The
upper
section of the steering column
is
carried in
ball bearings in the jacket tube. The ends of the tie
rods and steering rods are plastic-lined which means
that they
require no
I.
u bricating.
The car
has
a turning circle of about 10 m (3S
ft.)
and
the number
of steering wheel turns
from lock to
lock is
4.8.
VOLVO
103135
Fig. 6-29. Steering gear components
1. Sleering knuckle,
right
2. Relayarm
3. Sleering box
4. Lower sleering column flange
5. Lower sleering column
seclion wilh
universal joinl
6.
Ball joinl
7. Sleering knuckle, leH
8. 51eeri ng rod, leH
9. Ball joinl
10. Pilrnon arm
11. Tie rod
12. Ball joinl
13. 5teering rod, righl
14. Ball joint
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