Datsun 1000 - Page 99

16 Rear
A r le
is alsv
being
instal
ed it will be lleceS Jf
ru cuk
ulate
the
overall
pre
load to
ensure
that
after
reassemb v the actual
pinioll bearing
pre
load is the same as
originally
This
calculation is ca ied out dun
ng
the
following op
rations
4
Using
a
suitable
pre
load
measuring gauge
measure
the
overall
tOlque requi red
torotat the drive
pinion
at
the
flange
before
loosening
the
flange securing
nut and
make
a
record
of the
I1gure
obtained
5
Undo the
pinion flange
retaining
nut
approximately
three
complete
turns and
using
a
suitable
poller draw
the
flange along
the
pinion
shaft
to
abut
the
retaining
nut
6
Tighten
the
flange
retaining
nut
until there
is
a
slight
end
float in the
pinion
shaft
bearings
NOTE
This
will relieve the assemb
y
of
allY
pillioll bearillg
pre
load
but
will maintain the
side
bearing pre
Joad
and the
turque
llec eJ
saf
IV fum lhe
piniull
assemblJ
against
the
retardillg effect of
the old oil seal
7 Again
using
a
pre
Iuad
measuring gauge measure
the
torque
required
to rotate
the
pinion
at
the
flange
end
with
negative pinion
bearing p
e Ioad
as
in
operation
4
and record
the
ligure obtained
8
Undo and
completely
remove
the
pinion
flange
retaining
nut and
washer
and
again using
a
suitable
puller
withdraw the
flange
from the
pinion
shaft
9
Prise the defective
seal
assembly
out
of
the
differential carrier
bore
and
discard
10
Clean
the recess
for
the new seal in the
end of
the
carrier
bore
and
the
splines
on the end of
the
pinion
shafe
NOTE Ensure
that 110
foreign
matter
finds
its
way
infO the
front pinion bearing
or a
false
pre
load
setting
will
be
obtained
II
Apply
a
light
coating
of suitable
sealing
compound
to the outer surface of a new
pinion
oil
seal
position
it in
the bore
of
the differential carrier
so that
the
lip
of
the
seal
faces the
pinion bearing
and
tap
it
fully
into
place
NOTE The new
seal should be
allowed to stand immersed
in
light engine
oil
for
at
least
one hour
before installing
12 Apply
a
coating
of non
hardening sealing
compound
to the inner
splines
of
the
pinion
flange
position
the
flange
on
the end of the
pinion
shaft
and
tit
the washer and a new nut on the threaded
end of
the
pinion
shaft
NOTE Renew the
pinioll jlallge
if
the
splilles
dre a loose
fit
UIl he
slwJi
or
iJ
the seal
surJ
n
of
the
jlange
is
grovl
ed ur
rough
A new
jlange
should be a
reasonably
right fit
on the
shaft splines
11 Hold the
tlange against
rotation and
carefully
tighten
the
pinion retaining
nut until
there is
just
a
slight
end
float in the
pinion
shaft
and
bearings
14
Using
a
pre
load
measuring gauge
measure
the
torque
required
at
the
flange
end to rotate the
pinion
with
negative pinion
bearing
pre
load but with
the
original
pre
load on
the
carrier
side
bearings
plus
the
retarding
effect of
the new
pinion
seal and
if fitted the new
pinion
flange
Record the
figure
obtained
15
Subtract the
figure
obtained in
operation
7
from
that
obtained in
operation 14
and add the
result to
the
tlgure
obtained in
operation
4
16
The result
calculated in
operation 15
will be
the
overall
pre
load
required
at
the
pinion
flange
when
the
assembly
is
correctly adjusted
17 To
apply
the
overall
pre
load see
operations 15
and
16
hold the
pinion
flange
against
rotation and
very
carefully lighten
the
flange retaining
nut to
just
remove
the
bearing
end float
Rotate the
assembly
to
correctly
seat the
pinion bearings
18 Continue
to
tighten
the
flange retaining
nut
carefully
a fraction of a
turn
at a
time
alternatively
checking
the overall
pre
load
at
the
pinion
tlange
until the
pre
load
gauge reading
is as
detailed in
operation 16
NOTE It is most
important
to
adhere
strictly
to the
instructions
given
in
operation
i8 to avoid
exceeding
the
calculated overall
pre
load
bv
tightening
the
retaining
nut
beyond
this
point
and
over
compressing
the
special spacer
between the inner cones
of
the
pinion bearings
In the event
of
the
pinion bearing pre
load
figure
being
exceeded
by
overtightening
the
flange
nUl
it
will be
necessary
to remOl e
the
pinion flange
and
oil seal
again
and withdraw the
front
pinion bearing
inner
cone instal a new
collapsible spacer
and
re instal the
bearing
cont oil seal
pinion flange
with
washer
ilnd
a new
nut and
carry
out
operations
17 and
IS again
19
When
the calculated
pre
load has been
correctly
applied
to
the
assembly
connect
the rear
universal
joint
flange
to the
pinion
flange
then
instal and
tighten
the bolts
and self
locking
nuts
20
Instal both
rear
axle shaft
and
bearing
assemblies
in
the axle
housing
and fit the
brake drums
and
road wheels
Adjust
the brake shoes
21 Check the
lubricant
level in
the rear
axle and
top
up
with the
correct
grade
if
necessary
22 Check the
differential
housing
breather to
make
sure it is clear
23 Lower
the vehicle
to the
floor
100
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