wheel bolts DATSUN PICK-UP 1977 User Guide

UPPER
AND
LOWER

LINKS

REMOVAL
AND

INSTALLATION

Removal

I
Raise

vehicle
on
a
hoist
or

stands

2
Remove
wheel
and

brake
drum

as

an

assembly

3
Remove
wheel
hub
Refer
to
see

tion
Front
Axle

4

Loosen
bolts

retaining
brake
disc

to
knuckle

spindle
and

remove
brake

disc

5
Remove

knuckle
arm
torsion
bar

spimgJ
stabilizer
shock

absorber
and

tension

rod
in

t
ili
order

referring
the

related
sections

6
Remove

upper
fulcrum
bolt
se

curing
knuckle

spindle
support
to

upper
link

assembly
and
disassemble

them

7
Remove

upper
link

bushings
from

knuckle

spindle
support

8

Remove
screw
bushings
from

both
ends
of
lower
link
fulcrum

pin

9
Loosen
nut
at
lower

portion
of

knuckle

spindle
support
from
inside

and

pull
out
cotter

pin
retaining
ful

crum

pin

10
Pull

out
fulcrum

pin
with

drift

and
remove
knuckle

spindle

support

with
knuckle

spindle
from
lower
link

Then
detach
dust

cover

FA237

Fig
FA

19

Removing
fulcrum
pin

II

Remove
bolts

retaining
upper

link

spindle
and
remove

upper
link

spindle
with
camber

adjusting
shims

from

body
bracket
FrClnt

Axle
Front

Suspension

FA238

Fig
FA

20

Removing
upper
link

spindle

12
Remove
nut

retaining
lower
link

spindle
and
remove

lower
link

spindle

Remove
lower
link

with

torque
arm

from

mounting
bracket

13

Using
Transverse
Unk

Bushing

Replacer
ST36070000
to

lower
link

bushing
tap
it

with
a

hammer
and

drive

out
lower

link

bushing
from

bracket

F

A239

Fig
FA

21

Removing
lower
link

bushing

InstallatIon

Install

upper
and

lower
links
in

the

reverse

sequence
to
removal

noting

the

following
instructions

I

When
the

collar

inside
of

lower

link

mounting
bracket
and

bushing

outside

are
rusted

remove
rust
with

emery

paper

2

Fit
lower
link

bushing
into
lower

link

mounting
bracket

using
Trans

verse
Link

Bushing
Replacer

ST36070000
When

tapping
the
frift

with
a
hammer
be
careful

to
hit
the

drift

squarely

3

Secure
lower
link
to
lower
link

bushing
with
lower
link

spindle
and

torque
nut
to
74

to
8
0

kg
m
54

to

S8
ft
Ib

1

4
1n
4
Install

upper
link

spindle
to

upper

link

mounting
bracket
with

used

camber

adjusting
shims
and
bolts

Torque
bolt
to
7

0
to
9
0

kg
m
SI

to
6S
ft

lb

S

Install
dust
seat
to

the
lower
end

of

j
nuckle

spindle
support

6
Coat

grease
on
the
thread
of

fulcrum

pin
and
line

up
the

notch
of

fulcrum

pin
with

knuckle

spindle

sup

port
for

inserting
cotter

pin
Fit

fulcrum

pin
to

spindle
support
with
a

soft
hammer
Secure
cotter

pin
and

torque
lock
nut
to
0
8

to
1
1

kg
m

S
8

to
8
0
ft
lb

7

Coat

grease
to
the
tIuead

portion

of

screw

bushing
inside

liberally
Posi

tion

knuckle

spindle
support
at
the

center
of
lower
link
and
secure
screw

bushings
temporarily
by
hand
Mter

ascertaining
the
dimensions
become

correct
as
shown
in

Figure
F
A

22

torque
screw

bushings
to
20
to
30

kg
m

I4S
to
217
ft
lb

3

9
05
to

11
05

36
5
9
05
to
11
05

0
3563
to
0
4350

1
431
0
3563
to

0
4350

FA240

Fig
FA
22
In

tailing
IICrew
bu

hing

8

Replace
filler

plug
with

grease

nipple
and

pack
grease
until

grease

comes
out
from
dust
cover
Reinstall

filler

plug

9

Upon
installation
make
sure
that

fulcrum

pin

operates
smoothly
with

the

following
torque

Operating
torque

Less
than
0
5

kg
m
3
6
ft
lb

10
Install

upper
link

bushing
to

knuckle

spindle
support

I
I
Install
knuckle

spindle
support

to

upper
link
insert
fulcrum
bolt
and

torque
nut
to
3
9

to
S
3

kg
m
28
to

38
ft
lb

Condition

Noise

Grating
tire
noise

Jumping
of

disc
wheeL

Excessively
or

partially
worn

tire
Front
Axle
Front

Suspension

Probable
cause

Loose

steering
gear
bolts

linkage
and

suspension

groups

Faulty
shock
absorber

Damaged
wheel

bearing

Worn

steering
linkage
and

steering
gear

Worn
of
loose

suspension
link
screw

bushing

Improper
air

pressure
of
lire

Incorrect
wheel

alignment

Deformed
knuckle

spindle
and

suspension
linkage

Rough
driving

Improper
air

pressure
of
tire

Unbalanced
wheels

Faulty
shock
absorber

Worn
tire

Deformed
wheel
rim

Improper
air

pressure
of
tire

Incorrect
wheel

alignment

Damaged
wheel

bearing

Incorrect
brake

adjustment

Improper
tire

shifting
rotation

Rough
and

improper
wiving
manner

FA
16
Corrective
action

Retighten

Replace

Replace

Replace

Replace

Adjust

Adjust

Replace

Avoid

rough
driving

Adjust

Adjust

Replace

Replace

Replace

Adjust

Adjust

Replace

Adjust

Adjust

Drive
more

gently

DESCRIPTION

The
rear
axle

assembly
is
of

the

semi

floating

type
in

which
the
vehicle

weight
is

carried
on
the
axle
shafts

through

bearings
enclosed
in
the

bear

ing
cages
on
outer

rear
axle

case
The

axle
case
is
a

pressed
steeJ

Banjo

type
housing

The

rear
axle

assembly
is

attached

to
the
frame

through
semi

elliptic
leaf

springs
and

telescopic
hydraulic
shock

absorbers

Rubber

bushings
at

either

end
of

the
leaf

springs
and
shock

absorbers

are

designed
to
absorb
vibra

tion
and
noise

The
rear

axle
shaft

splines

engage

the
differential

side

gears
with

a
float

ing
fit
The

outer
ends
are

supported

in
the

bearing
cages
by
tapered
roller

bearings

The

bearings
are
lubricated

by

wheel

bearing
grease
The
axle
shaft
oil

seals

are
located

outboard
and

inboard

of
the

bearing
The

bearings
are

se

cured

against
shoulders

on
the
shafts

by
press
fit

and
held
in

place
by
a

large
nuts

The

bearing
cages
hold
the

bearings

against
shoulders
on
the
axle

case

Whee
side
thrust
is
taken

at
the

wheel

bearings

through
the
thrust

block
so
an
axle
shaft

may
be

re

moved

simply
by

removing
the
bolts

holding
the
brake
disc
to
the

bearing

cage
and
the
rear
axle
case

REMOVAL
AND

INSTALLATION

REAR
AXLE

ASSEMBLY

It
is
not

necessary
to
remove
the

reaT
axle

assembly
for

any
normal

repairs

However
if
the

axle
case
is

dam

aged
the
rear
axle

assembly

may
be

removed
and

installed

using
the
fol

lowing
procedures

I

Raise
rear

of
vehicle

high

enough

to

permi
t

working
underneath

Place
a

jack
under
center
of
axle
case

so
it

just

starts
to

raise
rear
axle

assembly

Place
stands

solidly
under
frame

members
on
both
sides
Remove

rear

wheels
Rear
Axle
Rear

Suspension

2

Mark

relationship
across

propeller

shaft

flange
and

companion

flange
of

differential
carrier
so
that
the

original

combination
is
restored
at

assembly

3

Remove
bolts

retaining
center

bearing
bracket
and

connecting
shaft

to

companion
flange
Withdraw

pro

peller
shaft
sleeve

yoke
from

transmis

sion

by
moving
the

shaft
rearward

passing
it
under

rear
axle

4

Disconnect
rear
hand

brake
cable

Q
by

removing
adjusting
nut

@
three

clamps
ID
and

connector

@

Slide
front
cable

rearward
and

discon

nect
rear

cable

@
at
connector

ID
by

removing
three

clamps
ID

5

Disconnect

rear
brake

hose
at

frame

@
Cover
brake
hose

and

pipe

openings
to

prevent
entrance
of

dirt

6

Disconnect

shock
absorbers
at

lower
end

f
and

push
shock
ab

sorbers

up
out

of
the

way

7

Lower

jack
under

axle
case
Re

move
U

bolts

spring

clips
@
to

separate
axle
case
from

spring

8

Place
a

jack
under

center
of
axle

case
Pass
axle

case

through

space

above

spring
and
take
it

out
to
the

side

RA134

Fig
RA
3

Removing
rear

axle

assembly

9
Install

the
axle
case

assembly
in

the
reverse
order

of
removal

RA
3
RA312

Fig
RA
2
Under
view

Tightening
torque

U
bolt

Spring

clip

7
3
to

9
9

kg
m

53
to
72

ft
lb

Shock
absorber

lower
end
nut

1
6
to
2
2

kg
m

12to

16ft
Ib

Brake

pipe
flare

nut

I
S
to
1
8

kg
m

II

to
13
ft
Ib

Propeller
shaft
to

companion

flange
connecting
bolt

2
0
to

2
7

kg
m

14
to
20
ft
Ib

Center

bearing
bracket

fixin
holt

1
6
to
2
2

kg
m

12
to
16
ft
Ib

REAR
AXLE
SHAFT

AND

WHEEL

BEARING

I
Raise
rear
of
vehicle
and

support

under
axle
case
on
stands
Remove

rear
wheel

2
Disconnect

rear
hand

brake
cable

by
removing
adjusting
nut
and

clamps

3
Disconnect

brake
tube
at
rear

wheel

cylinder
Cover
brake

tube
and

wheel

cylinder
openings
to

prevent

entrance
of
dirt

4

Remove
brake

drum

Not

If
brake

drum
cannot
be

easily

removed
return

brake

adjuster

install

two
bolts

M8
x

I
2S
in

holes
on
the

flange
face
of
brake

drum
and

tighten
bolts

evenly
until

brake
drum
is
driven

out

5

Remove

nuts

retaining
wheel

bearing
cage
to
brake
disc

I

Jq
AA135

Fig
RA
4
Removing
nuts

AA418

Fig
RA
5

Removing
rear
axle

shaft

assem

bly

7

Remove
oil
seal
in

axle
case
if

necessary
and
install

new
seal
Insure

against

damaging
the

seal

lip
Rear
Axle
Rear

Suspension

8

Position

axle
shaft
in
vise

with

Rear

Axle

Stand
ST07630000

9
Unbend
lock
washer

with
a
screw

driver

Note
Do

not
use
used
lock

washer

again

RAl38

Fig
RA

6
Unbending
lock
washer

10
Remove
lock

nut

using
Rear

Axle

Bearing
Lock
Nut

Wrench

ST38020000

I

AA139

Fig
RA
7
R

mouing
lock
nut

II
Withdraw
wheel

bearing
to

gether
with

bearing
cage
and
brake

disc

using
Rear
Axle
Shaft

Bearing

Puller
HT72480000

HT72480000

r

t

Rvr

G

l
AA343

Fig
RA
8

Removing
bearing
o

12

Remove
oil
seal
in

bearing
cage

if

necessary

13

To
remove

wheel

bearing
outer

race

after
removed
oil
seal

apply
a

brass
drift
to
race

side
surface
and

withdraw
it

by
tapping
the

lop
of

drift
with

a
hammer

Installing
can
be

proceeded
in
the

reverse

order
of
removal

procedure
as

follows

RA
4
I
Fit

wheel

bearing
outer

race

by

tapping
with
a

brass
hammer

evenly

while

fitting

2
Install

a
new

oil
seal
in

bearing

cage
Lubricate

cavity
between
seal

lips
with

wheel

bearing

grease
after

fitting
seal

3
Place

bearing
cage
with
brake
disc

and

bearing

spacer
on
axle

shaft
and

fit

bearing
cone

To
install

bearing

cone

apply
a
brass
drift
to
race
side

surface
and

tapping
the

top
of
drift

with
a

hammer

AA141

Fig
RA
9

Installing
whetl

bearing

4
Place

bearing
lock
washer

Q
and

bearing
nut
lock
washer

@
on
axle

shaft

and

tighten
lock
nut

@
using

Rear

AJde

Bearing
Lock
Nut

Wrench

ST38020000

and
bend

up
lock
wash

er

Notes

a
Be

careful

to

place
the
faced

side
of

nut
to
washer
side
so

that
washer
is

not

damaged

b
Coincide
washer

lip
with
nut

groove

correc

ly
by

tightening
nul
and

bend
washer

carefuljy
so
that

lip

will
nol
be

damaged

Tightening

torque

IS
to
20

kg
m

J08
to
14S
ft
Ib

t
i

i

f

ifii
itf

L

4

S

11

iI
i

j

pu
y
J
t

Mf

i

I

AA142

Fig
RA
IO
Layout
of
ock
nut

S

Apply
wheel

bearing
grease
in

wheel

bearing
and

recess
of
axle

case

end

Lubricating
portion

AA143

Fig
RA
l1

Lubricating
portion
in
and

around
wheel

bearing

6

Apply
gear
oil
to
the

spline
at

the

inner
end

of
axle
shaft

Apply
a

coal

of
wheel

bearing
grease
on
the

seal

surface
of
the
shaft

7

Install
left
or

right
shaft
and

adjust
axial
end

play
by
applying
rear

axle
case
end
shim
indicated

by
arrow

mark

Axial
end

play
0
3
to
0
9
mOl

0
012

to
0
035
in

Standard
shim
thickness

1
5
mm
0
059
in

Tightening
torque
of

bearing
cage
fIXing
nut

54
to
6
4

kg
m

39
to
46
ft
lb

w

AA144

Fig
RA
12
Installing
rear
axle

shaft

Rear

axle
case
end
shim

Thickness
mOl
in

O
OS
0
0020

0
07
0
0028

0

10
0
0039

0
20
0

0079

O
SO
0
0197
Rear
Axle
Rear

Suspension

8
Install
shaft
in

opposite
side

and

adjust
axial
end

play
by
applying
shim

Axial
end

play
0
02
to
O
IS

mOl

0
0008
to
0
0059
in

Tightening

torque
of

bearing
cage

fixing
nut

5
4
to
6
4

kg
m

39
to

46
ft
Ib

Fig
RA
13

Measuring
axial
end

play

9
Install
other

parts
in

reverse
se

quence
to
removal

REAR
AXLE
CASE

Rear

axle

case

may
be
removed

and

installed

using
the

following
pro

cedures

I
Raise
rear
of
vehicle
and

support

securely
under
both
frame
members

with

stands

2
Remove
rear
axle

assembly
See

removal
of

rear
axle

assembly

3
Remove

rear
axle
shaft
at
both

sides
See
removal
of
rear
axle
shaft

and
wheel

bearing

4

Remove
differentiai
carrier

as

sembly

Installing
can
be

proceeded
in
the

reverse
order

of
removal

procedure

Another

procedure
is

available
as

listed
below

I

Raise
rear
of
vehicle
and

support

under
both

frame
members
with

stands

2
Remove
ear
axle
shaft
at
both

sides

3
Remove

differential

gear
carrier

assembly

4
Remove

rear
axle
case

RA
5
Installing
can
be

proceeded
in
the

reverse
order
of
removal

procedure

Tightening
torque

Differential
carrier
to
axle
case

fixing
nut
I
7

to
2
5

kg
m

12
to
18
ft

Ib

Oil
drain
and
fIller

plug

6

to
10

kg
m

43

to
72

ft
lb

REAR
SPRING

1
Raise

rear
of
vehicle
and

support

under
both
frame
members
with

stands

2
Disconnect
shock
absorber
at

lower
end

CD
and
remove
U

bolts

Spring
clips

2

3
Position

jack
under
rear
axle
case

Raise
jack
and
float
axle

case
from

spring

4
Disconnect
rear

spring
shackle

by

removing
nuts

AA147

Fig
RA
15
Removing
spring
shackle

5
Disconnect

spring
from
body
by

removing
spring
front

pin

RA148

Fig
RA
16
Remvoing
spring
pin

6
Remove

rubber
bush
in

spring
if

necessary
and
install
new
bush
Coat

rubber
hush
with
a

soapy
solution

prior
to

assembly

InstaH
rear

spring
in
the

reverse

order

of
removal

noting
the

following

poinc

Vehicle

weight
must
be
on
rear

wheels
when

tightening
front

pin

shackle
and
shock
absorber
lower
end

nut
in

order
to

clamp
rubber
bush
in
a

neutral

or
unloaded

position

Tightening
torque

Spring
fTont

pin
nut

11
5

to
13

0

kg
m

83
to
94
ft
Ib

Spring
shackle
nut

11
5

to
13

0

kg
m

83
t094
ft
b

U

bolt
7
3
to
9

9

kg
m

S3
to
72
ft
lb

Shock
absorber
lower
end
nut

1

6
to

2
2

kg
m

12
to
16
ft
lb
Rear
Axle
Rear

Suspension

SHOCK
ABSORBER

Raise
rear
of

vehicle
and

support

under
axle

case
on
stands
It
is

recom

mended
that
a

hydraulic
hoist
or

open

pit
be
utilized
if

available

2

Disconnect
lower
end
of
shock

absorber

by
removing
nuts

Q
at

spring
seat

3

Disconnect

upper
end
of
shock

absorber

by
removing
nut

2
at
frame

RA146

Fig
RA
J
7

Removing
shock
absorber

Installation
of
shock

absorber
in

the

reverse
order
of

removal

Note
Vehicle

weight
must
be
on

Tear

wheels
when

tigtrtening
shock
ab

sorber

upper
and
lower
ends
in

order
to

clamp
rubber

bushings
in
a

neutral
or
unloaded

position

INSPECTION

REAR
AXLE

SHAFT
AND

WHEEL
BEARING

Inspect
the

following
parts
for

faults
and

replace
as

required

RA
6
I
Check

axle
shaft
for

straightness

cracks

damage
wear

and
distortion

2
Check
the

lip
of
oil
seal
for

damage
deformation
and

wear

3
Check

bearing
for
wear
and

damage

REAR
AXLE

CASE

Check
axle

case
for

yield
deforma

tion

cracks
or
oil

leakage
and

replace

if

necessary

REAR

SPRING

Clean
all

rust
and

dirt
from

spring

leaves

using
a
wire

brush
if

necessary

1

Examine

spring
leaves
for
frae

tures
or

cracks

2

Check
front

bracket
and

pin

shackle
U

bolts
and

spring
seat
for

wear
cracks

straightness
and

damaged

threads
If

faulty

parts
are
found

replace
with

new
ones

3

Inspect
all
rubber

parts
for
wear

damage

separation
and
deformation

Replace
them
if

necessary

SHOCK
ABSORBER

I

Test
shock
absorber
and

compare

with
the

specifications
given
in
Service

Data

and

Specifications

Replace
if

necessary

2
Check
for
oil

leakage
and
cracks

Also
check
shaft
for

straightness

3

Inspect
rubber

bushings
for
dam

age
cracl
s
and
deformation

Replace

parts
if

necessary

Rear
Axle
Rear

Suspension

Spring
front

pin

Spring
shackle

Bearing
cage

fIXing
bolt

Wheel

bearing
lock
nut

Air
breather

Differential

gear
carrier

to
axle
case
nut

Propeller
shaft

flange
bolt

Drain
and
filler

plug

Bumper
rubber

fixing
bolt

Wheel
nut
kg
m
ft
lb

kg
m
ft
Ib

kg
en
ft
lb

kg
m
ft

Ib

kg
m
ft
Ib

kg
m
ft
Ib

kg
en
ft
Ib

kg
m
ft

Ib

kg
m
ft
Ib

kg
m
ft

lb
11
5
to
13
0
83

to
94

11
5

to
13

0
83
to
94

S
4
to
6
4
39

to
46

IS
to
20
108

to
l4S

0
7

to
0

9
S
I

to
6
S

17
to
2
7

12
to
20

2
0
to

2
7

14
to
20

6
to
10
43

to
72

1
6
to
2
2

12
to
16

8
to
9
S8

to
6S

TROUBLE

DIAGNOSES

AND
CORRECTIONS

When

rear
axle
and

suspension
is

suspected
of

being
noisy
it
is

advisable

to
make
a

thorough
test
to
determine

whether
the
noise

originates
in

the

tires

road
surface
exhaust

propeller
shaft

engine
transmission
universal

joint
wheel

bearings
or

suspension

Noise
which

originates
in

other

places
can
not

be
corrected

by
adjust

ment
or

replacement
of

parts
in
the
rear
axle

and
rear

suspension

In
case
of

oil
leak

first
check
if

there
is

any

damage
or

restriction
in

breather

Condition
Probable
cause

Noise
Loose
wheel
nuts

Loose
one
or

more

securing
bolts

Lack
of

lubricating
oil
or

grease

Faulty
shock
absorber

Incorrect

adjustment
of

rear
axle
shaft
end

play

Damaged
or
worn
wheel

bearing

Worn

spline
portion
of
rear
axle
shaft

Broken
leaf

spring

Loose

journal
connections

or
so
no

Wheel
and
tire

unbalance

Damaged
rubber

parts
such
as
leaf

spring

bush
shock
absorber
moun

ting
bush

Faulty
universal

joints

Instability
in

driving
Loose
wheel
nuts

Worn
shock
absorber

Worn

or
broken
leaf

spring

Oil

leakage

Damaged
or

restricted
air

breather

Damaged
oil
seal
in

rear
axle
case
or
differ

ential
carrier

Oil

leakage
from
between
the
differential

carrier

and
axle
case

RA
8
Corrective
action

Tighten
the

wheel
nuts

Tighten
the

bolts
to
the

specified
torque

Lubricate

as

required

Replace
the
shock
absorber

Adjust
the
rear
axle

shaft
end

play

Replace
wheel

bearing

Replace
if

necessary

Replace
leaf

spring

Tighten
to

the

given
torque

Balance
wheel

and
tire

Replace
the

required
parts

Adjust
or

replace

Tighten
to
the

given

torque

Replace
faulty
shock
absorber

Replace
leaf

spring

Clean
or

replace
air

breather

Replace
the

damaged
oil
seal

Tighten
to
the

specified
torque
or

replace

gasket

Ibove
mentioned

st
is
available
when
op

the

FRONT
BRAKE
Brake

System

entire
brake

system
except

N

L
S
V
is

correctly

adjusted

After
shoe
return

spring

Adjuster
assembly

8

Adjuster
head

9

Adjuster
head
shim

10
Lock
spring

11

Adjuster
housing

12

Adjuster
wheel

13

Adjuster
screw

14

Retaining
spring

15
Lock

plate

16

Adjuster
shim

17
Rubber
boot
1
Brake

disc

2
Brake

shoe
assembly

3
Wheel

cylinder
assembly

4

Brake
shoe

upper
return

spring

5
Brake
shoe
lower

return

spring

REMOVAL

I
Jack

up
front
of
vehicle

just
high

enough
to
remove
tire
and

support
it

with

safety
stands

2

Remove
wheel

and
brake
drum
If

brake
drum
cannot
be

easily
removed

return
brake

adjuster
install
two
bolts

M8
x
1
25
in
holes
on
the

flange
face

of
brake
drum

and

tighten
bolts
even

ly
until
brake
drum
is
driven
out

3
In
order
to

ease

operation
re

move
hub

assembly
from
knucRle

spindle
Refer
to
Front
Axle

4

Unhook

upper
lower
and
after

shoe
return

springs
and
then
remove

brake
shoe
assemblies

S
Disconnect
brake
hose
from

wheel

cy
linder

6
Loosen

securing
nut
and
remove

wheel

cylinder

7
Remove
rubber
boot

adjuster

shim
lock

plate
and

retaining
spring

and
then
remove

adjuster
assembly

from
brake
disc
Fig
BR
I

6
Front
brake

1
Brake
hose

2
Wheel

cylinder
attaching

bolt

BA312

3
Rubber
boot

Fig
BR
17

Removing
wheel

cylinder

DISASSEMBLY
AND

ASSEMBLY

Wheel
cylinder

@

rr
l

@

t

a

Wheel

cy
linder

housing

2
Piston

3
Piston

cup

4
Dust

cover

5
Retainer
BR649

6
Connector

7

Packings

8
Connector
bolt

9
Bleeder

screw

10

Bleeder

cap
Wheel
cylinder
can
be

disassembled

simply
by
the

following
procedures

described
below

Remove
retainer
and
dust
cover

and
take
out

piston
from
wheel
cyl

inder
Be

careful
not
to

damage

sliding

part
of

piston
and

piston
cup

Thoroughly
wa
sh

u
disassembled

parts
in

brake
fluid
or
alcohol

Note
Do

not
wash
rubber

parts
with

mineral
oil

since
they
are
deterio

rated

When
alcohol
is
used
however
do

not
immerse
rubber

parts
in
alcohol

longer
than
30
seconds
After

parts

are
cleaned

dry
them
with
com

pressed
air

Assemble
wheel

cylinder
in

reverse

sequence
of

diassembly

When

securing
connector
bolt
in

sert
its
location

tip
to
the
hole
of

wheel

cylinder
firmly
and

tighten
it

securely

Carry
out

operations
carefully
so

that

component
parts
are
not
damaged

or
no
dust
and
other

foreign
materials

enter

cylinder

Note

The
brake
wheel

cylinder
is

available

in
both
NABCO
make
and

TOKICO
make
There
is

no
inter

changeability
of

repair
kits
or
com

ponent
parts
between
NABCO
and

TOKICO
makes

When

replacing
the

repair
kit
or

ent

parts
ascertain
the

brand

of
the
brake
wheel

cylinder

body
Be
sure
to
use

parts
of
the

same
make
as
the
former
ones

INSPECTION

Brake
drum

I

Replace
brake
drum
whose
dia

meter
is

beyond
the
limit
of

1
5
mm

0
OS9
in
with

respect
to
the

standard

inner
diameter
of
2S4
0
rom
10
00

SR
tO
Fig
BR
18
Front
wheel

cylinder
in

Condition

Brake
chatters

Brake

squeals

Pedal

pulsates

Brakes
fade

Brakes

drag

Unbalanced
brakes
Brake

System

Probable
cause

Groove

or
out
of

round
brake
drum

Loose

or
bent

brake

disc

Distorted
brake
shoes

or

pads

Grease
or
brake
fluid
on

linings

Dirty
or
scored
brake

drums

Distorted
brake
shoes
or
bent

support
plate

Weak
or
broken
brake
shoe

retaining
spring

or

return

spring

Glazed
or
contaminated
brake

lining

Out
of

round
or
off
center
drum

Brake
fluid
has
too
low

boiling
point

Use
of

improper
linings
or
brake

linings
are

contaminated

Brake
drums
are
out
of
round

Hydraulic
connections
master

cylinder
and

wheel

cylinders
are

corroded
or

damaged

Bleed
screw
is

open

Pedal

linkage
is

binding
or

push
rod

adjust

ment
is
too

long

Master

cylinder
compensator
part
is
ob

structed

Seized
master

cylinder
piston

Poor
shoe
condition

Poor

wheel
cylinder
condition

Deformation
of

piston
cups

Hand
brake
will
not
return

Clogged
master

cylinder
return

port

Improper
tire
inflation

Improper
adjustment
of
shoe

to
drum
clear

anee

Grease
oil
mud
or
water
on

linings
or

pads

Mud
in

brake
drum

Deterioration
of

linings
or

pads

Excessive
wear
of

linings
or

pads

BR
23
Corrective
action

Grind
or

replace
as

required

Tighten

support
plate
bolts
to

specified

torque
or

replace
plate

Replace
as

necessary

Replace
linings

Blowout

assembly
with

compressed
air
or

refinish
drum

Replace
faulty
unit

Replace
if

faulty

Cam

ground
lining
to
eliminate

glaze
If

it

doesn
t

replace
linings

Turn

drum
or

replace
as
necessary

Drain
and
fill

system
with

approved
fluid

Replace
linings

Repair
or

replace
as
necessary

Repair
as
necessary

Close
screw
and
bleed

system

Lubricate

linkage
check

pedal
return

spring

for
condition
and

adjust
push
rod

as
neces

sary

Blowout

foreign
matter
with

compressed

air

Disassemble
master

cylinder
and

replace

piston
Bleed

system

Clean
and

repair

Repair
or

replace

Replace

Check
and

repair

Clean

Inflate
to
correct

pressure

Readjust

Clean
brake

mechanism
and
check
for
cause

of

problem
Replace
linings
or

pads

Clean

Replace

Replace

Condition

Pedal

yields
under

slight
pressure
Brake

System

Probable

cause

Wheel

cylinder
in

poor
condition

Poor

sliding
condition
of
brake
shoe

Looseness
of

cylinder
body
or

back

plate

securing
bolts

Scored
or
out

of
round
drums

Sticking
wheel

cylinder

cups

Deformation
of
back

plate

Incorrect

adjustment
of
wheel

bearings

Incorrect

adjustment
of
wheel

alignment

Looseness
of
leaf

spring
securing
U

bolts

Faulty
N
L

S
V

Deteriorated
check
valve

Ex

ternalleaks

Leakage
on
master

cylinder

BR
24
Corrective
action

Repair
or

replace

Adjust

Fasten
or

replace

Recondition
or

replace
brake

drum
as
reo

quired
Check
for

improper
lining
contact

with
drum
and

grind
lining
if

necessary

Recondition
or

replace
cylinder

Replace

Adjust
or

replace

Adjust

Tighten
or

replace

Replace

Replace
check
valve
and
bleed

system

Check
master

cylinder

piping
and

wheel

cylinder
for
leaks
and

repair

Overhaul
master

cylinder