Datsun 1000 Workshop Manual page 105

4 S eeeriiag
12
Rotate
the
sector
shaft
several times
ensuring
it
turns
smoothly
13 Fit the pitman
arm to
the
sector
shaft
and
ensure
that the
marking
on
the pitman
arm
is in
line
with the
marking
on
the
sector
shaft
14
Select the central
point
in the
steering
box
release the
adjusting
SCrew
lock
nut
and
adjust
the
screw
until the
mOVement
of
the pitman
arm
is
within
0 01
rnm
10 0039 in
15
Refill
the
steering
box with SAE 90 EP oil
and
instal the
plug
16
Instal the
steering
box
assembly
10
the vehicle
Installation
is
a
reversal of the removal procedure
I7 Finally check
the steering
wheel
aligitment
gear
shift mechanism and lubricate all
applicable points
DESCRIPTION
1 COLLAPSIBLI
ST f
liiX6
The principle
of the
steering column
is to
compress on
impact of
a
pre
determined force
The
operation
of
a
collapsible
steering column
assembly
is the
same
as
that
of
the
conveniional
type
The
only
variance is that caution
must
be exercised
when
working
on
the
column when
in situ
Severe
bumping
or
downward
pressure to
or on
the
steering
wheel could
result
in the
shearing
of the
nylon pins connecting the upper
and
lower shafts
causing the column to collapse
UPPER COLUMN
SHAFT
I
r
SNAP RING GROOVE
LOWER COLUMN TUBE
1
LOCK COllAR BOm
b
The
column assembly is comprised
of
an
upper and
lower
shaft
lower column
tube
jac
et
tube
column
bush
and collar
steering
post
clamp
snap link
and
washer
The column is
so
designed
so
that
on
impact
the
force
applied
to
the
steering wheel forces
the upper
shaft down
shearing
the
nylon
pin S connecting
the upper and lower
shaft allowing
the
upper shaft
to
move
down
over
the
lower shaft
The
jacket
is constructed of
a
fibre glass material and
is
of the convoluted
design This
design
allows
the jacket
to
absorb
initial
shock then
collapse when the upper shaft is
forced
down
over
the lower shaft
PLASTIC PINS
LOWER
COLUMN SHAFT BALL NUT
I
I
BEARING
t
COLUMN
BUSH
t
COLLAPSIBLE
COLUMN TUBE ASSY OLT
A
BOLTS
F
I
SLIDING
BLOCK
COLUMN CLAMP
COLUMN FLANGE
SHIMS
STEERING BOX ASSY
Exploded
View of
Collap
ible
Steering
Column
Components
fitted
to
1200 Models
TO
REMOVE
AND INSPECT
4 JA KET TUDf
I Remove the
steering
gear
assembly
in the
same
manner
as
the conventional
assembly but
firstly
remove
the
snap
ring from the upper face of
the column bush
Do
not bump the
steering
wheel
or
convoluted
section
of the
assembly during
removal
2 Carry out an
inspection
of the
steering box
and
componen
ts in the normal
manner
3
With
the
steering jacket
iristalled
on
the shaft
meaSUre
the end clearance between the
jacket
bush
flange
and
the washer
on
the shaft If the end
clearance
is
not
within 3
mm
0 118 in the
jacket
can
be
put back
into
service
by
means
of
a
thicker thrust
washer
at
the top of
the
jacket
4
Inspect
the
plastic pins conoecting
the column
shafts for
fatigue
5
Inspect
the
steering
column lock
collar
for
fatigue
and looseness
6
Support the column shaft
on
two V blocks
at
the
worm
end and
check the shaft for distortion
If distortion
exceeds
1 0
mm
0 039 in
at the
steering
wheel end
correct
or
replace
as
necessary
i06