CHAPTER
9
THE
STEERING GEAR
9:1
9:2
9:3
9:4
9:5
9:6
Description
Routine
maintenance
Removing
rack
and
pinion
unit
Dismantling
the rack
and
pinion
Reassembling
the
rack
and
pinion
Adjusting
the steering rack
ball head
9:1 Description
The
rack
and
pinion
type
steering
gear
rncorporates
an
automatic
play
take-up
device consisting
of two
spring-
loaded
plungers pressing
the rack
on the
pinion.
The
plunger
located
on the
pinion
side takes
up the
steering
wheel angular
play,
while
the one on the rack
side acts as
a steering
damper and takes
up axial
play.
The assembly
(see
FIG
9:1), which is
of simple
design
and high
strength,
consists
oÍ
an
aluminium
sleeve or housing, inside
which the rack
slides under the
action
of a helical tooth
pinion
integral
with the steering
wheel
shaft.
The
rack is connected to
the steering
levers
through
two adjustable connecting links, each
Íitted with two
end fittings.
On
the leÍthand
side the connection is
through a
ball head
Íitting
housed within the rack
and
on the nghthand
side
through an eye end fitting
screwed
into
the rack.
The
ball
head
permits
accurate
parallelisnr
adjustmei)1,
one full turn
of the ball head is
equal to 3 mm toe-in
or
Ílare
according
to the
direction of
rotation.
The
gearing
down of the steering rriechanism
ts
'1
:18.6
corresporrding
to
3.75
Íull steering
wheel turns
between stoos.
P404
9:7 Ad
justing
the
pinion
side rack
damper
plunger
clearance
9:8 Dismantling
and
reassembling
the
connect-
ing link balljoints
9:9
Refitting
the
rack
and
pinion
unit
9:10 Road testing the
steering
9
: 11
Fault diagnosis
9:2
Routine
maintenance
The steering
assembly has
eight
lubrication
points
which need
attention every 1800 miles.
The steering
gear
housing
should only be
lightly
lubricated
while
all the
other
points
should have normal
grease gun
service
using
multi-purpose
grease.
The
grease
nipples
are as follows:
reft-
and
righthand
kingoins.
Left-
and
righthand
steering lever
ball
heads.
Steering
gear
housing.
Rack taopets
and ball
heads
9:3 Removing the
rack
and
pinion
unit
1 Place
the caÍ on
a ramp
oí over a
pit
with the front
wheels in
the straight-ahead
position.
2 Disconnect the
battery.
3
Remove the upper
yoke
bolt to
disconnect
the
steering column Írom the flexible
joint.
The
steering
assembly
as
Íitted
to the car can be seen
in
FIG 9
:2.
4 Disconnect the steering
gear
connecting
links from
the steering
arms.
5 Unscrew the
two
steering
gear
housing attachment
screws.
6 Remove
the
assemblv
írom
the car.
77
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