1977 DATSUN PICK-UP ECO

Rear
Axle
Rear

Suspension

SERVICE
DATA
AND
SPECIFICATIONS

Applied
model

All
models

Item

Rear
shock
absorber

Stroke
x
Maximum

length

mOl
in
190
x
47S
7
48
x

18
70

Damping
force

at
0
3
m
1
0
ft
sec

Expansion
kg
lb
75
to
101
165
to
223

Compression
kg

lb
3S
to
S3
77
to
1l7

Standard
Option

Rear
leaf

spring

Dimensions

Length
x

Width

x
Thickness

Number
of
leaves

mOl
in
1
200
x

60
x
6
3

5
1

13
1

47
24
x
2
36
x
0
24
3

0
20
1

0
51
1
1

200x60x
72

6
1

13
2

47
24
x
2
36
x
0

28
2

0
24
1

0
512

Free

camber
mOl
in
IS3

6
0
140
S
5

Laden
camber

mmlkg
in
lb

6
440
0
24
970
24
440
0
94

970

Spring
constant

kg
mOl

lb
in
2
1

to
S

O
118
to
280
2
6

to
10
0
146
to
S60

Rear

axle

End

play
mOl
in
0
02
to
O

IS
0
0008
to
0
0059

Rear
axle

case
end
shim

thickness
mm
in
O

OS
0
0020

0

07
0
0028

0
10
0
0039

0
20
0
0079

0
50
0

0197

Recommended
for

use
on

heavy
load
under

high
center
of

gravity
such
as

camper
loading

Tightening
torque

Shock
absorber

upper
end
nut

Shock
absorber
lower
end
nut

Rear

spring
U

bolt

Clip
kg
m
ft
lb

kg
m
ft
Ib

kg
m
ft
lb
3
1

to
4

1
22
to
30

1

6
to
2

2
12

to
16

7
3
to

9
9
53
to
72

RA
7

The
620

series
vehicles

are
equip

ped
with

hydraulic
brakes

on
the
four

wheels
and
mechanical
hand
brakes

on

the
rear
wheels
The
front
brake
is

the
uni
servo

type
and
the
rear
the

duo

servo
with
the
built
in

hand

BRAKE
PEDAL

FRONT
BRAKE

REAR
BRAKE

BRAKE
PEDAL

Qi

f

l

II

t

Unit

mm
in

I
Under
the
condition
that
the

push
rod
of
brake

lamp
swi

tch
is

pushed
in

position
the

height
of
brake

pedal
from
toeboard
to
148
mm
5
83

in

operating
the
switch

adjusting

nuts
Then

tighten
nuts

securely

Tightening
torque

1
2

to
1
5

kg
m

9
to
I
I
ft
Ib

2

Adjust
the

length
of

push
rod
Brake

System

GENERAL
DESCRIPTION

brake
The
mechanical
hand
brake
is

controlled

by
a
hand
brake
lever
locat

ed
in
the
driver

s

compartment

For
added

safety
the
tandem

I
1lI3ter

cylinder
Master
Vac
and

Nissan
Load

Sensing
Valve
N

L
S
V

ADJUSTMENT

CONTENTS
are
standard

equipment
on
all
models

The
Master
Vac
is
installed
to
increase

braking
force
The
N
L

S
V
ensures

greater
safety
and

reliability

BR
2

BR
2

BR
3
HAND

BRAKE

Parking
brake

BLEEDING
HYDRAULIC
SYSTEM
BR
3

BR
3

Free

height

Full
stroke
at

pedal
pad
A
148

5
83

B
134

10
140

5
28
to
5
51

C
43
to
49

1
69

to
1
93
Depressed
height

1
Push
rod

adjusting
nut

2
Switch
adjusting
nuts

3
BraKe

lamp
switch

BA765

Fig
BR
l

Adjusting
brake

pedal

with
its

adjusting
nut
so
as
to
become

0
6
to
1
2
mOl
0
024
to
0

047
in
in

play
Then

tigh1en
nut

securely

Tightening
torque

1

6
to
2

2

kg
m

12

to
16
ft
lb

Note
Take
care
not
to
allow
the

push

rod
to

get
into
master

cylinder
in

free
condition

BR

2
3
After
completing

adjustment

operate
brake

pedal
several
times
to

ensure
that
it
travels
over
its
entire

stroke
of
137
mm
5

39
in

smoothly

without

showing
squeak
noise
twist

ing
or
interference

FRONT
BRAKE

1
Raise

vehicle
until
wheel
clear

floor

2

Remove
rubber
boot
from
brake

disc

3

Ughtly
tap
adjuster
housing
and

move
it

forward
Turn
down

adjuster

wheel
with
a

screwdriver
and

spread

brake
shoes

Stop
turning
adjuster

wheel
when
a
considerable

drag
is
Jelt

and
lock

up
brake
drum

Note
For
both

right
and
left
brakes

brake
shoes

spread
when

adjuster

wheel
is
turned
downward

4
Return

adjuster
wheel
12
ratches

to
obtain
correct
clearance
between

brake
drum
and
brake
shoes
Turn

brake
drum
and
make
sure
that
brake

drum
turns
without

dragging
when

brake
shoes
interfere
with
brake
drum

then

readjust
clearance

5

Install
rubber
boot

Fip
BR
2

Adjusting
front
brake

REAR
BRAKE

With
hand
brake

fully
released

adjust
rear
brake
shoe
clearance
For

the
service

procedures
refer
to
Front

Brake

Fig
BR
3
Adjusting
rear
brake

HAND
BRAKE

Parking
brake

I
Raise

vehicle
until
rear
wheels
are

clear
of
the
floor

2

Apply
hand
brake
lever

operate

lock
nuts
to
be
80
to
100

mrn
3
lS
to

3
94
in

in
hand
brake
lever
stroke

and
tighten
lock
nuts

securely

Applying
force
to
hand
brake

lever

20

to
30

kg
44

to
661b
Brake

System

1
t

0
t

6

0

I

o

nJ
c

BA655

Fig
BR
4

Adjusting
lock
nut

3

Fully
release
hand
brake
and

rotate
rear
wheels
No

drag
should
be

present

Notes

a
Before

adjusting
hand
brake
com

plete
the

adjustment
of
rear
brakes

b
After

adjusting
hand
brake

operate

the
brake
lever
to
make
cable

stable

c
Hand
brake
must
be

operated

smoothly
while

being

pulled
and

released
Make
sure

that
no
abnor

mal
noise
dragging
twisting
or

other
faulty
condition
occurs

BLEEDING

HYDRAUL
Ie
SYSTEM

Hydraulic
brake

system
must
be

bled
whenever

any
line
has
been
dis

connected
or
air
has

entered
into

system

When

pedal
action
has
a

spongy

feel
it
is
an
indication
that
air
has

entered
the

system

Bleeding
the

hydraulic
system
is

an

essential

part
of

regular
brake
service

BR
3
I

Clean
all
dirt
around
master

cyl

inder
reservoir

I
remove
cap
and

top
up

reservoir

with
recommended
brake

fluid

2

Thoroughly
clean
mud
and

dust

from
bleeder
valve

so
that
outlet

hole

is

free
from

any
foreign
material

Install
a

bleeder
hose
on
bleeder
valve

Place
the
other
end
of
hose
in

a

container

filled
with
brake
fluid

3

Depress
brake

pedal
two
or
three

times
then

keep
pedal
fully
depressed

4

With
brake

pedal
fully
depressed

open
bleeder
valve
to

expel
air

Notes

a

Pay
attention
to
brake
fluid
level
in

master

cylinder
reservoir

during

bleeding

operation

b
Do
not

reuse
brake
fluid
drained

during
bleeding

operation

c

Bleed
air
as
follows

1
Master

cylinder
front

2
Master

cylinder
rear

3
N
L
S
V

front

4
Front

wheels

S
Rear

wheels
left
one
first

6
N
L

S
V

rear

7
N
L

S
V
center

d
Exercise

care
not
to

splash
brake

fluid
on

exterior
finish
as
it

will

damage
the

paint

5

Close
bleeder
valve

quickly
as

brake

pedal
is
on
down
stroke

6
Allow
brake

pedal
to
return
slow

ly
with
bleeder
screw
closed

7

Repeat
bleeding
operations
until

no
air

bubbles
show
in
hose

Notes

a
Brake
fluid

containing
air
is

white

and

has
visible
air

bubbles

b
Brake
fluid

containing
no
air

nms

out
of
bleeder
valve
in
a

solid

stream
free
of
air

bubbles

8

Repeat
above

steps
on
the

re

maining
brake
lines

to

expel
all
air

3

Hook
return

spring
to

brake

pedal

assembly
from
accelerator

pedal
side

4

Apply
a

coating
of
recommended

multipurpose
grease
to
the
inner
and

outer
faces
of

pedal
bushing
clevis

pin
and
hooks

of
return

spring

Charge
the
clearances
in

bushings
with

grease

Grease

m
n

L

g

U

BR298

Fig
BH

7
Greasing
place

5

lnstali
brake

lamp
switch

6

Adjust
the
brake

pedal
after
in

stallation
Refer
to
the

instructions

under

Adjustment

Tightening
torque

Fulcrum

pin

1

9
to
2
4

kg
m

14to

17ft
ib

MASTER
CYLINDER

The
diameter
of

cylinder
is
19
05

mm

y
in
for

all
models

The
tandem

master

cylinder
contains
two
fluid

reservoirs
which

connect
the

front
and

rear
brake

lines

independently

Braking
force
is

constantly
main

tained
when
failure
occurs
in
either

the
front
brake

system
or

the
rear

brake

system
Failure
in
the

front

brake

system
will
leave
the

rear
brake

still

operative
or

failure
in
the
rear

brake

system
will
leave
the
front
brake

system
still

operative

The
reservoir
is

eq
ui

pped
with
a

retention

cap

To
remove
this

cap
proceed
as

follows

I
Tum
retention

ring
fully
in
the

REMOVE
direction

2
Pull
out
retention

cap
Brake

System

To
install
it

proceed
as
follows

I
Turn
retention

ring
used
in
the

retention

cap
fully
in

the
REMOVE

direction

Tokico

@

1tr

I

I

I
j
1

Nabco

BR926
2

Align
the

projection
in
retention

cap
with
the
slit
in
the
reservoir
tank

and

push
retention

cap
in
the
tank

3
Turn
retention

ring
fully
in
the

TIGHTEN
direction

00
CD
1
Reservoir

cap

2

Reservoir
tank

3
Secondary

piston
return

5pring

4

Stopper
screw

5

Secondary

piston

6
Primary

piston
return

spring

7
Primary

piston

Fig
BR
B
Sectional
view

of
tandem
master

cylinder

o

BR658

Fig
BR
9
Master

cylinder

BR
5
REMOVAL

1
Disconnect

front
and
rear

brake

tubes
from

master

cylinder

Notes

a
When

removing
brake
tubes
use

Flare
Nut

Torque
Wrench

GG94310000

Never

use

open
end
or

adjustable

wrench

b
When

disconnecting
brake
tubes
be

sure
to
use
a

container
to
receive

draining
brake
flnid
Use
of

rags
is

also

suggested
to

keep
adjacent

parts
and
area
clean

2
Remove
master

cylinder
securing

nut
Then
master

cylinder
can
be

taken

out

DISASSEMBLY

AND

ASSEMBLY

1

00
11I

1

Reservoir

cap

2
Oil
mter

3
Oil

reservoir

4

Packing

5
Valve

cap
Brake

System

00

oC
1

O

b
0
1

r
r

L

BA927

6

Secondary
piston

stopper

7

Bleeder
screw

8

Secondary
return

spring

9

Secondary
piston

10

Primary
return

spring
11

Primary
piston

12
Piston

stopper

13
Piston

stopper
ring

1
Remove
reservoir

cap
and
filter

and
drain
out
brake
fluid

2

Pry
off

stopper
ring
using
a

screwdriver

3
Remove

stopper
screw
and

take

out

stopper
primary
piston
assembly

spring
and

secondary
piston

assembly

in
the

order
shown

Note
Discard

piston
cup
if
it
is
re

moved
from

piston
sembly
and

use
a
new

one

4

Unscrew

plugs
to

gain
access
to

check

valve
for

disassembling

Note
Never
detach
reservoir
tank
U

it
is
removed
for

any
reason
dis

canI
it

and
install
a
new
one

S
Assemble
master

cylinder
in

the

reverse

sequence
of

disassembly
pay

ing
particular
attention
to
the

follow

ing
notes
Fig
BR
10
Master

cylinder

Tightening
torque

Valve

cap

T
okico

8

t09

kg
m

S8
to
6S
ft
Ib

Nabco

2
5
to
3
S

kg
m

18
to
2S

ft
Ib

Bleeder

0
7

to
0

9

kg
m

S
to

7
ft
lb

Notes

a

Replace
gaskets
and

packings
with

new
ones

b

Apply
brake
fluid
or
rubber

grease

to

sliding
contact
surfaces
of

parts

to
facilitate

assembly
of
master

cylinder

c
The
blllke
master

cylinder
is
avail

able
in
both
NABCO
make
and

TOKlCO
make
There
is
no
inter

changeability
of

repair
kits
or
com

ponent
parts
between
NABCO
and

TOKlCO
JIIlkes
When

replacing

the

repair
kit

or

component

parts

BR
6
ascertain
the
brand
of
the
brake

master

cylinder
body
Be

sure
to

use

parts
of
the

same
make
as
the

former
ones

INSPECTION

Thoroughly
clean
all

parts
in

a

suitable
solvent
and
check
for
WOol
or

damaged
parts
Replace
any

part
that

is

faulty

Note
Do

not
clean
robber

parts
with

minerai
oil
since
this
will
be
the

sure

way
of

deteriolllting
parts
Use

brake
fluid
or
alcohoL
When

alco

hol
is
used
for

leaning
these

parts

do
not

immerse
them

in
it

longer

than
30

seconds
After

parts
are

cIeaned

dry
with

compressed
air

I
Check

cylinder
and

position
for

evidence
of
abnonnaI

wear
or

damage

Replace
if
found

faulty

2

Check

piston
to

cylinder
clear

ance
If
it
is

more
than

O
IS

mm

0
OOS9
in

replace
either

piston
or

cylinder

Master

cylinder
inner
diameter

19
0S
mm
Yoin

3
Check
for
weakened

fatigued
or

damaged
springs
and

replace
if
neces

sary

4
When
master

cylioder
is

disassem

bled
be
sure
to

discard

cups
and

valves

Replace

any
other

part
which

shows

evidence
of
deformation
wear

or

damage

S

Replace
damaged
oil
reservoirs

and

caps

INSTALLATION

Install
master

cylinder
in
the

re

verse

sequence
of
removal

Bleed
air

out
of
master

cylinder
by

loosening
bleeder
screw
after
it
is

installed
in

its

original
position

Tightening
torque

Brake
master

cylinder

attaching

nut

0
8
to
1
1

kg
m

6
to
8
ft
Ib

Brake
tube
connector

I
S
to
1
8

kg
m

II

to
13
ft
Ib

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

BA313

Fig
BR
19
Greasing

points

REAR
BRAKE
Brake

System

4

Adjust
brake
shoe
clearance
and

bleed
brake

system
Refer
to
the

instructions
under

topic

Adjustment
in

this
section

Upon
completion
of
the
above
ad

justments
make
sure
that
brake

oper

ates

correctly
and
no
brake

fluid
leaks

BA315

REMOVAL

I
Jack

up
rear
of
vehicle

just
high

enough
to
remove
lire
and

support
it

with

safety
stands

2
Remove
wheel
loosen

hand
brake

and
detach
brake
drum

3
Turn

pin
by
900
and
remove

antirattle

springs

4

Open
brake
shoe
assemblies
out

ward

against
return

spring
and
remove

extension
link

S

Remove
return

springs

6
Remove
brake
shoe
assemblies

Note

that
after

secondary
brake
shoe

assembly
must
be

separated
from

toggle
lever
When

separating
after

secondary
brake
shoe

assembly
from
toggle
lever
withdraw
clevis

pin

7
Disconnect

toggle
lever
from

hand
brake
rear
cable

BR316

Fig
BR
21

Remouing

toggle
leuer

BR
12
1

Brake
disc

2
Brake
shoe

assembly

3
Wheel

cylinder
assembly

4
Return

upper
spring

5
Return
lower

spring

6
After
shoe
return

spring

7
Retainer

8
Antirattle

spring

9

Spring
seat

10

Adjuster
assembly

11

Adjuster
head

12

Adjuster
head
shim

13
Lock

spring

14

Adjuster
housing

15

Adjuster
wheel

16

Adjuster
screW

17

Toggle
lever

18

Extension
link

19

Return
spring

20

Adjuster
spring

21
Lock

plate

22

Adjuster
shim

23
Rubber
boot

24
Antirattlc
pin

Fig
BR

20
Reor
brake

8
Disconnect
brake
tube
at
wheel

cylinder
by
loosening
flare
nut

9
Remove
wheel
cylinder
from

brake
disc

by
loosening
installation

nuts

10
Remove
rubber
boot

adjuster

shim
lock

plate
and

adjuster
springs

and
remove

adjuster
assembly
from

brake
disc

f

BR317

Fig
BR
23

Gre
ing
point

4

Tightening

torque

Wheel

cylinder

J
S
to
1

8

kg
m

II
to

13ft
Ib

Connector
bolt

1

9
to
2
5

kg
m

14
to
18
ft
Ib

Brake
tube

1
5
to
1

8

kg
m

II

to
13

ft
Ib

Air
bleeder

0
7
to
0
9

kg
m

S

to
7
ft
Ib

Brake
disc

5
4

to
6
4

kg
m

39
to
46
ft

Ib

S

Adjust
brake
shoe
clearance
and

bleed
brake

system
Upon
completion

of

the
above

adjustments
make
sure

that
brake

operates
correctly
and
no

brake
fluid
leaks

MASTER
VAC

DESCRIPTION

A
vacuum

suspended
Master
Vac

is

installed
behind
the

master

cylinder

As
the

brake

pedal
is

depressed
fluid

is

forced
under

high
pressure
through

the
brake

pipes
to
the
wheel

cylinders

to
retard

or

stop
the

vehicle

The
Master
Vac
contains

a

spring

loaded

diaphragm
of
IS2
4

mm
6
in

in

diameter
It

operates
on

negative

pressure

produced
n
the

engine
intake

manifold

The
tandem

master

cylinder
is

capable
of

producing
high
pressure

even
if
the
Master
Vac
is

faulty
Brake

System

Note
The
Master
Vac

diaphragm
dif

fers
from
fonner
ones
for

improved

braking
force
Do
not
install
fonner

Master
Vac
on
1976
models
The

1

Plate
and
seal

2
Push
rod

3

Diaphragm

4

Rear
shell

5

Diaphragm

plate
Master
Vacs

are
identified

by
the

label
color
as
follows

1976
model
Caution

Label

Former
models
YeJlow

BR321

11

Valve

operating
rod

12
Valve

return

spring

13

Poppet
return

spring

14
Exhaust
valve

15
Valve

plunger

16
Reaction

disc

17

Diaphragm
return

spring

18
Front
shell
6
Seal

7

Vacuum
valve

8

Poppet
assembly

9
Valve

body
guard

10
Air

silencer
filter

INSPECTION
OF

OPERATION

Checking
yscuum

pressure

I
Connect

a
vacuum

gauge
in
the

line
between
check
valve

and
Master

2
Start

engine
and
increase

engine

speed
Stop
engine
when
vacuum

gauge
indicates
SOO

mmHg
19
69

inHg

BR
14
Fig
BR
24
Sectionall1iew

of
Master
Vac

Vac
as

shown
in

Figure
BR
25

1

Check
valve

2

Vacuum

gauge

BA169

Fig
BR

25
Air

tight
t
t
t

up

Air

tight
test

I
Fifteen

seconds
after

engine
is

stopped
observe
the

rate
of

drop
in
air

pressure
registered
by
vacuum

gauge

If
a

pressure
drop
of
25

mmHg
0
98

inHg
is

exceeded
refer
to
the
follow

ing
chart
to
determine
the
cause
of

failure