width DATSUN PICK-UP 1977 User Guide

2
The
allowable
maximum

out
of

round
of
brake
drum
is
0
02

mm

0

0008
in

Re

condition
or

replace
brake
drum

if

specified
limit
is
exceeded

3

Measure
for

tapered
brake
drum

If

specified
limit
of
0

02
mm
0

0008

in
is

exceeded
as
measured
at

a

position
where
the
distance
of
4S
mm

177
in
is

kept
away
from
inlet

re
condition
or

replace
brake
drum

4

Contact
surface
with
which

linings
come
into

contact
should
be

finished
to

such
an
extent
that
it
is

ground
by
a
No
120
to
150
sand

paper

S

Using
a
drum

racer
finish
brake

drum

by
machining
if
it

shows

any

sign
of
score
marks

partial
wear
or

stepped
wear
on
its
contact
surface

Note
After
brake
drum
is

completely

re
conditioned
or
renewed
check

drum
and
shoes
for

proper
contact

pattern

Brake

assembly

I
When
brake
shoe

linings
are

cracked

incompletely
seated
uneven

Iy
worn

andlor
deteriorated
due
to

excessive

heating
or
soiled
with

oil

grease
and
brake
fluid

replace

2

Replace
linings
if
the
thickness
is

worn
down
to
less
than
1
0
mm
0
039

in

Note

When
brake
shoe

lining
is
in

stalled

grind
brake
shoe

lining
face

to
diameter

equal
to
that
of
brake

drum

lining
dimension

Width
x
Thickness
x

Length

4S
x

4
S
x

244
mm

1
77
x
0

177
x

9
61
in

3

Check

adjuster
for
smooth

oper

ation

4

Replace
shoe
return

springs
which

are
broken
or

fatigued
Brake

System

Standard
dimensions
of
shoe

springs

Free

length
Dia

of

spring
No
of
Installed

Item

lengthlload

mOl

in
mOl
in

coils

mm

kg
in
lb

Upper
136
5

2
0
0

079
37
IS9
S
14

to
16

S

37
6
28
31

to
3S

Lower
134
S

2
3
0
091
35
IS9
5
21

to
23

5
30
6
28
46
to

Sl

After
shoe
83
2

1
4
O
OSS
27
S
99
4

to
S

3
28
3

90
9
to
II

Wheel

cylinder

I

Replace

any
cylinder
or

piston

which
is
scratched
scored
or
worn
on

its

sliding
contact
surface

2

Replace
worn

parts
if

piston
to

cylinder
clearance
is

beyond
O
IS
mm

0
OOS9
in

Wheel

cylinder
inner
diameter

19
0S
mOl

Y
in

3

Replace
piston
cup
which
is

worn

or
otherwise

damaged

4

Replace
if

contacting
face
of

cyl

inder
and
shoe
is
worn

locally
or
in

step

S

Replace

damaged
dust
cover

fatigued
piston
spring
or

faulty

threaded

parts

6

Replace
tube
connector
which
is

worn
on
its

threaded

portion

INSTALLATION

Install
front
brake
in
the

reverse

sequence
of
removal

paying
particular

attention
to
the

following
instructions

I

When

assembling
adjuster
assem

bly

apply
brake

grease
to

adjuster

housing
bore

adjuster
wheel
and
ad

juster
screw

When
installing
adjuster

assembly

to
brake
disc

apply
brake

grease
to

disc

adjuster
and

retaining
spring
slid

ing
surfaces

to
slide

adjuster
smoothly

Measure

adjuster
sliding
resistance

Adjust
by
adjuster
shim
when

sliding

resistance
is

in
rrect

BR
ll
Adjuster
sliding
resistance

S
to

12

kg
II
to
261b

2

When

installing
wheel

cylinder
be

sure
to
secure
the

cylinder
with
R

mark

to
right
hand
disc
and
the
one

with
L
mark
to

left
hand
disc

Otherwise
brake
hoses

may
interfere

with
other

adjacent
parts
As

to
the

connecting
instructions

of
brake
hose

no
twist
or

contact
is
existed
on

brake

hose

referring
the

related

topic
Brake

line

Tightening

torque

Wheel

cylinder

SA
to

6
6

kg
m

39
to
48
ft

lb

Connector
bolt

1
9
to
2
5

kg
m

14
to
18
ft
Ib

Brake
hose

1
7
to
2

0

kg
m

12
to
14
ft
lb

Air
bleeder

0
7

to
0
9

kg
m

5
to
7
ft

Ib

Brake
disc

4
2

to
S
O

kg
m

30

to
36
ft
lb

3

Before
installing
brake
shoe
as

semblies

apply
brake

grease
to
wheel

cylinder
and

adjuster
brake
shoe
in

stalling
grooves
and
brake
disc
and

brake
shoe

assembly
contact
faces

two

places
Exercise

care
not
to

allow

grease
to

come
into
contact
with

linings
and

adjuster

DISASSEMBLY
AND

ASSEMBLY

Wheel

cylinder

Remove
dust
cover
and

pull
out

piston
head
and

piston
assembly

Refer
to
Wheel

Cylinder
of

Front

Brake

CD

l
ID

345

0

1
Dust

cover

2

Piston
head

3
Piston

4

Piston
Cll

p

5

Wheel

cylinder

housing

6

Bleeder

cap

7

Bleeder
screw

8

Connector

9
Washer

10
Connector
bolt
BR318

Fig
BR
22

Rear
wheel

cylinder

INSPECTION

Brake
drum

Check
brake

drum
in

the
same

manner
as

outlined
in
the
Front
Brake

Drum

Brake

assembly

I
When

brake
shoe

linings
are

cracked

incompletely
seated
uneven

ly
worn
andlor
deteriorated
due
to

excessive

heating
or

soiled
with
oil

grease
and
brake
fluid

replace

2

Replace

linings
if
the
thickness
is

WOol
down

to
less
than

1
0
rom
0
039

in

Note
When
brake

shoe

lining
is
in

stalled

grind
brake

shoe

lining
face

to
diameter

equal
10

lha
I

of
brake

drom

Lining
dimemion

Width
x
Thickness
x

Length

4S

x
4

5
x
244

rom

1
77
x
0
177
x
9
61
in
Brake

System

3
Check

adjuster
for
smooth

oper

ation
4

Replace
shoe
return

springs
which

are

broken
or

fatigued

Standard
dimensions

of
shoe

springs

Dia
of

spring
No

of
Installed

Free

length

lengthlload
Item

mOl
in

mOl
in

coils

mmlkg
in
lb

175

2

0
0
079
32
5
184
11
to
13

Upper

6
89

7
24
24
to
29

158

2
3

0

091
30
176
18

to
20

Lower

6
22

6
93
40
to
44

83
2

1
4
0
055

27
5
99
4

to
S

After
shoe

3
276

3

90
9

to

II

20
5

1

6
0
063
3
5
12
3

S
to
4
5

AntiratUe

0
807

0
47
8
to
9
9

Wheel

cylinder

I

Replace
any
cylinder
or

piston

which
is

scratched
scored
or
worn
on

its

sliding
contact
surface

2

Replace
worn

parts
if

piston
to

cylinder
clearance
is

beyond
O
IS

rom

0

00S9
in

Wheel

cylinder
inner

diameter

19

0S
rom

Xin

3

Replace
piston
cup
which

is
worn

or

damaged

4

Replace
if

contacting
face
of

cyl

inder

and
shoe

is
worn

locally
or
in

step

5

Replace
damaged
dust

cover

fatigued
piston
spring
or

faulty

threaded

parts

6

Replace
tube
connector
which
is

worn
on
its
threaded

portion

INSTALLATION

Install
rear

brake
in

the
reverse

sequence
of
removal

paying
particular

attention

to
the

following
instructions

I

Rear

adjuster
assembly
is

the

same
as
front
Refer
to
the

paragraph

covering
Front
Brake
Installation

Adjuster
sliding
resistance

S
to
12

kg
II
to
261b

BR
13
2

When

assembling
toggle
lever

and

after
brake
shoe

assembly

adjust
clear

ance
between

toggle
lever
and

after

brake
shoe

assembly
to
0
to
0
3
mOl
0

to
0

012
in
with

a

properly
selected

toggle
pin
washer

Toggle

pin
washer

No

Thickness
rom
in

I
2
0
0
079

2
2
3
0
091

3
2

6
0
102

4
2
9
0
114

S

3
2
0
126

3

Before
installing
brake
shoe

as

semblies

apply
brake

grease
to
the

following

places

1
Brake
shoe

installing
grooves
of

adjuster
and
wheel

cylinder

2
Extension
link

installing
grooves

3
Lower
surface
of

spring
seat

4

Contact
surfaces
between
brake

disc
and
brake
shoe

assembly
six

places

At
this
time

be
sure
not
to
coat

brake

grease
to
brake

linings

Brake

System

SERVICE
DATA
AND
SPECIFICATIONS

Brake

pedal

Free

height

Free

play
at

pedal
pad

Full
stroke

at
pedal
pad

Depressed
height
mOl
in

mOl
in

mOl
in

mm
in
148
S

83

I
to
3
0

04
to
0

12

134
to
140
5
28
to
S
51

43
to
49

169
to
193

Brake

adjustment
notches

Front

Rear
12

12

Master

cylinder

Inner
diameter

Piston
to

cylinder
deaJance
mm
in

mm
in
19
0S

Yo

O
IS

0
OOS9

Master
Vac

Diaphragm
diameter
mOl
in

Maximum
vacuum
leakage
after
15
sec

mmHg
inHg

Shell
seal

depth
A
mOl
in

Push

rod

length
B
mOl
in
152
4
6

2S
0
98

6

7
to
7
0

0
264
to
0
276

10

0
to
10
5
0
394
to
0
413

Front
drum
brake

Type

Wheel

cylinder
inner
diameter

Lining

Width
x
Thickness
x

Length

Lining
wear
limit
Uni
servo

mm
in
I9
0S

Yo

45
x

4
5
x

244

1
77
x
0
177
x
9
61

1

0
0
039
mm
in

mOl
in

Rear
drum
brake

Type

Wheel

cylinder
inner

diameter
Duo
servo

mOl
in
19
0S

Yo

Brake

drum

Inner
diameter

Repair
limit
of

thickness

Inside
runout
mm
in

mOl
in

mOl
in
254
0
10

2SS
S
10
06

0
02
0
0008
maximum

PaJking
brake

Type

Stroke

Adjuster
sliding
resistance
mm
in

kg
lb
Stick

type

80
to
100
3
lS
to
3
94

S

to
12
11

to
26

BR
20