1968 DATSUN 510 flat tire

TROUBLESHOOTING
17

of
tIre
loose
wheels

unproper
adjustment
or

wear
of
front
wheel

bearIngs
faulty
wheel

align

ment
or
wear
of
transverse
lInk
and
tension
rod

bushings
Inspect
all

parts
carefully
for
wear
or

damage

Replace
or

replUI
parts
as

required

2
Shock

transmltled

through
steering
wheel

This
is

usually
most
noticeable
when

traveling

over
bad
roads
at

relatively
high
speeds
Causes

Include

damage
to
the
idler
ann
insuffiCient

tIghtening
of

steenng
gear
box
wear
of
the
steer

Ing
linkage
and
wear
of
the

suspension
ball

joint

Inspect
all

parts
for
wear
or

damage
Refer
to

Chapter
ThIrteen
for
service
or

repair
you
can

perform
and
for

procedures
which
should
be

referred
to

your
deal
r

3

Shlmmymg

This
is

usually
most
noticeable
when
a

specIfic

speed
IS
attained
and
will

normally
repeat
at
that

speed
Causes
are

generally
unbalanced
wheels

unproper
adjustment
of

steenng
gear
insuffi

cient
backlash
malfunction
of
the
shock
ab

sorbers
or
loose
bolts
for
the
strut

mountIng

Reparr
or

replace
defective

parts
as

required

Refer
to

Chapter
Thirteen

4

Wandermg
of
car
m
one
dlrectlOnl

This

problem
can
be
caused

by
improper
air

pressure
loose
wheel

nuts
difference
in
tire
tread

wear
from
left

to

right
side
Incorrect

adjustment

of
wheel

bearings
defectIve
wheel

beanngs

collapsing
or

twistIng
of
front

spnng
or
Incorrect

wheel

alignment
Also

binding
of
the
brake

shoes
worn

bushings
in
the
transverse
link
or
the

tension
rod
and
deformation
of
s

enng

lInkage

and

suspension
link
can
cause
wander

Carefully

iuspect
all

parts
for
looseness
and
wear
and
re

place
or

repaIr
as

required
In
some
c
ases
a
de

fective
rear

suspension
may
also
cause
the

vehicle
to
wander

5

InstabIlity

Instability
can

be
caused

by
unproper
tIre

pres

sures
worn

bushings
in
the
transverse
link
and

tension
rod
mcorrect
wheel

alignment
worn

steenng
linkage
Incorrect

adjustment
of
steer

ing
gear
and
unbalanced
wheels

Inspect
all

parts
carefully
for
wear
and

damage
Adjust

repair
or

replace
as

required
6

Heavy
feelmg
m

steering

This
can
be
caused

by
improper
tIre

pressures

insuffiCient
or
contamInated
lubncant
in

gear

box

damage
or
insuffiCient

grease
In

suspeuslon

ball

Joint
damaged
or

badly
adjusted
wheel

bearIngs
worn
or

damaged
steermg
gear
dam

age
of

upper
strut

bearing
and
mterference
of

steenng
column
With
turn

signal
SWitch

Inspect

all

parts
carefully
for
wear
and

damage
Adjust

repair
or

replace
as

required

7
ExceSSIve

play
m

steermg
wheel

This
is

usually
caused

by
Incorrect

adjustment
of

the

steenng
gear
worn

bushings
in
the

steering

linkage
or
Idler
arm
mcorrect

adjustment
of
the

front
wheel

bearings
worn

bushIngs
in
the
trans

verse
lInk
and
tension
rod

Carefully
inspect
all

parts
for
wear
or

damage
Adjust
repair
or
re

place
as

reqUIred

TIRE
WEAR
ANALYSIS

Abnormal
tIre
wear
should

always
be
ana

lyzed
to
deternune
the

cause
The
most
common

are
Incorrect
tIre

pressure
improper
dnving

overloading
and

Incorrect
wheel

ahgDment

Figures
2A

through
2F

identify
wear

patterns

and
mdicate

likely
causes

Of

I

1

l

D

1

Undennflatlon
Worn
more
on
Sides
than
In

center

18

CHAP1
lER
THlREE

c

c

c

ce

J

1

Ii

j

Wheel

Alignment
Worn
more
on
one
sIde
than

the
other

Edges
of
tread
feathered

r

I

0c
l

Road
Abrasion

Rough
wear
on
entire
tire
or

In

patches

t

y

1

OverInflabon
Worn
more
In
center
than
on

sides
Wheel
Balance

Scalloped
edges
indicate

wheel
wobble
or

tramp
due
to
wheel
unbal

ance

f
Q
F

r

r

r

f

i
m

i
O

2

7

iK

J

1

J

i
i

5J

CombInation
Most
tIres
exhibit
a

combination

of
the
above
This
tIre
was

overinflated
center

worn

and
the
toe
In
was

Incorrect
feather

Ing
The
driver
cornered
hard
at

high
speed

feathering
rounded
shoulders
and
braked

rapidly
worn

spots
The

scaly
roughness
In

dlcates
a

rough
road
surface

WHEEL
BALANCING

All
four
wheels
and
tIres
must
be
ill
balance

along
two
axes
To
be

ill
statIc
balance

weight

must
be

evenly
dlstnbuted
around
the
llXlS
of

rotatIon

Figure
3A
shows

a

statIcally
unbal

anced
wheel

Figure
3B
shows
the
result
wheel

tramp
or

hoppmg
Figure
3C
shows

proper
static

balance

To

be
ill

dynamiC
balance
the
centerhne
of

die

welghtmusCcomclde
with
the
centerhne
of

the
wheel

Figure
4A
shows
a

dynamically
un

balanced
wheel

Figure
4B
shows
the
result

wheel
wobble

or

shmuny
Figure
4C
shows
the

proper
dynannc
balance