Tooth Contact Pattern Checking; Van; Side Bearing Pre-Load Adjusting - Datsun 510 series Workshop Manual

greased
Install the
flange
washer and
pinion
nut
Tighten
the
nut to
a torque reading
of 14
17 kgm 101 130 Ib fL If
the
cotter
pin
hole is not
correctly aligned
a
suitable washer
should be fitted Do NOT adjust by overtightening the pinion
nul
Van
Lubricate
the
front
bearing with oil and place it in the
carrier Grease the lip of the oil
seal
and install
it to
the final
drive housing Install the drive
pinion
the
new collapsible
spacer
and the drive
flange
Fit the drive pinion
nut
and tighten temporarily until all
slackness is eliminated from the front and
rear
of the drive
pinion
NOTE Ensure that oil
and grease
have been completely
removed from the threads of the
pinion
gear
the pinion
nut
and the washer
Tighten the pinion
nut
and check the
preload
with
a
preload
gauge
As the nut is
tightened
to
the
specified
torque
reading
of 13 20
kgm
94 0 144 6Ib fL
the preload
must
be
measured
at every
five
to ten
degrees
turn
of the
pinion
nut
As the
pinion
nut is
tightened the stepped portion of the
spacer
is deformed See Fig G 29
J
and the length
between the
bearings
adjusted
The drive pinion bearing preload
with oil seal and
new
bearing
is 7 15 kg
cm
6 1 13 0 lb in Turn the drive pinion
to
settle the bearing and
re
check the preload
and
tightening
torque
If the preload
rate
is exceeded it will
be necessry to
fit
a new
spacer the old
spa cr
cannot be reused and the
preload
must not
be adjusted by loosening the
pinion
nul
Side bearing
pre
load
adjusting
If the
original side bearings
arc
to be used
the shims
must
be of
the
same
thickness
as
those
previously
fitted
To select shims for
new
side bearings proceed
as
follows
The
standard
width of the
side
bearings is given
in
Technical Data This width
must be measured before
attempting
to calculate the
required
thickness of the
adjusting
shims Place
a
weight
of
approximately 5 kg 5 5 lb and of predetermined
height onto the side bearing
as
shown
in
Fig
G 3 0 Mcasure
the
width of the
bearing
with
a
dial
gauge
as
illustrated turning
the bearing
two
or
three times
to
gain
an
accurate meaSurement
Dimensional variations from the standard
measurements
are
marked
on
the
left side
bearing housing of the
gear
carrier
on the right side bearing housing of
the gear carrier and
on
the
differential
case
These variations
are
marked in units of
l l O Omm
and
are
used for the f rmula
to
calculate t1H thickness of the
adjusting shims in the following
manner
Where TI equals the left
side
bearing shim crownwhecl
side
T2 equals the right
side
bearing
shim
pinion
gear
A
equals
the
figure
marked
on
the left side
bearing housing
B
equals
the
figure
marked
on
the
right side bearing housing C and 0 equals
the
figure
marked
on
the differential
case
and E and F is the
difference bctween the width of the side
bearings and the
standard bearing width H
the
figure marked
on
the crownwhcel
Fig
G 3 1 The
following
formulae can now
be used to deter
mine the
required shim
thicknessl
s
for both side
bearings
I OOcc Estate
car
Left side
bearing
TI A C D H
x
0 01 0 100 E
Right
side
bearingT2
B D H
x
0 01 0 090 F
I800cc Van
Left side bearingTI A C D H xO OI 0 175 E
Right side bcaringT2 8
D
H
x
0 01 0 150 F
As
an
example where A 1 B C 2 D 3 E 0 02mm
H
I
The formula for
the
left side
bearing
is T I I 1 3 1
x
0 01
0 175 0 02 0 205mm
1400
and
1600cc Estate car
The required thickness of shim
can
be found using
the
following
formula
in
a
similar
manner
to that
previously
described for
the 1800cc models
Left side
bearing T
I A
C D E
7
Right side bearing T2 B D
F
6
Shims
are
available in five thicknesses of 0 05 0 07 0 10
0 20 and 0 50
mm
0 002 0 0028 0 0039 0 0079 and 0 0197
in
Fit the selected side bearing adjusting
shims
on
the
differential
cage
and press in the side
bearing
inner
races
using
a
suitable ddfL nstall the differential cage into the carrier and
fit the bearing caps Ensure that the marks
on
the
caps
coincide
with the marks
on
the
carrier
Tighten
the
bearing
cap
bolts
to
the specified torque reading See Tighte ing
torques
Measure
the
dimension between the
outer
edges
of the
left and
right
hand caps
using
a
large
micrometer
as
shown in
Fig
G 32 This dimension should be 198 40 198 55
mm
7 8110
7
8169 in for the 1400 and 1600
ce
Estate
cars
and
1800
ce
Van and 173 23 17329
mm
6
8201 6 8244 inl
for the 1800
cc Estate cars
Measure the backlash of the crownwhcel and
pinion
with
a
dial
gauge
The backlash
must
be
adjusted
to
0 13 0 18
mm
0 005
0 007 in
on
the 1800
CC
models and
to
0 15 0 20mm
0 006 0 008 in
on
the 1400 and 1600
cc
models Adjustment
can
be carried
out
by moving side bearing shims from the right
hand side
to
the left hand side if the backlash is
too
high or
vice
verca
if the backlash is too low
Tighten
the
bearing
cap
bolts
to the specified torque reading
after
adjusting Ensure that the
run out
at
the
rear
of the
crown
wheel does
not
exceed
O
05mm
0 002
in
Finally
heck the tooth
contact pattern
as
described below
TOOTH CONTACT PATTERN Checking
The final check
on
reassembly
is
an
inspection
of the tooth
contact
markings
of the crownwhed
and pinion
Apply
a
coal
of red lead
in
oil
to
4
or
5 teeth of the
crown
wheel Turn the crownwheel backwards and forwards
several
times
to
obtain
a
clear
impression
of
the contact
areas
Heel contact Fig G 3 1
71