1977 DATSUN PICK-UP lock

REMOVAL

1

Removing
flare

nuts
on

both
ends

and

clips
effects
the

removal
of

brake

tube
and
brake
hose

2

Rear
brake
hose
can
be

removed

by
disconnecting
the
tube
and
then

turning
round
the
hose

Note
When

removing
brake
tubes
and

hoses

use
Flare
Nut

Torque

Wrench
GG943IOOOO

Never
use

an

OpeD
end

or
an

adjust

able
wrench

INSPECTION

1
Examine

all
hoses
for
swell

rubbing
marks
or
ozone
cracking

re

placing
those

found
with

any
of
above

badly
beyond
use
Also

inspect
end

fittings
and
be
sure
that
no
fluid
leak

through
staked
end

has
taken

place

replace
if

necessary
Hose

with

badly

rusted

fitting
should

also
be

replaced

with
a
new
one

2

Clean
all
tubes

to
remove
dust

and

dirt
with

isopropyl
alcohol

check

ing
for

collapse
wear

cracking
swell

or

rusting
Replace
if
foun
d

with

any

of
wove
Use
care
not
to

damage

brake
tubes

while

operation

Check
if
tubes

are

clamped
secure

ly

Mter
all

brake
lines

have
been

installed

retighten
aU
connections
if

necessary
to

assist
in

obtaining
correct

torque
In

retightening
at
front
wheel

cylinder
first
remove
hose

clamp
and

loosen
flare
nut
on

opposite
side
to

avoid

twisting
hose

Hold

pedal
as
far
downward
as

possible
80

kg
176
lb
or
more

examining
evidence
as
to
whether
fluid

is

leaking
through
brake

lines
or

con

nections

Leakage
in

any
manner
can

not
be

permitted
here
In

case
fluid

leaks

tightening
to

specified
torque

tighten
additionally
up
to
2
5

kg
m

J
8
ft
lb
Under

no
circumstances

should
not

be

tightened
over
2
5

kg
m

18
ft
Ib

torque
since
this

elongates

end

fitting
making
it

impossible
to

reuse
brake
tube

Under
no
circumstances
should
rear

brake
hose
and
3

way
connector
be

retightened
over

specified
torques
In
Brake

System

stead

replace

copper
washer
with
a

new
one

after

checking
for

sign
of

damage
on

seating
surface
Never
reuse

an
old

copper
washer

INSTALLATION

Brake
hose

Front
brake

hose

In

installing
brake
hose
first

jack

up
vehicle

to
take
off
the

weight
of

vehicle
from

wheels
so
that

suspension

is
in
rebound

Steering
wheel
should

also
be

kept
in

straight
ahead

position

To
connect
brake

line
first

connect

brake

hose
to
wheel

cylinder
with
the

specified
torque

Tightening
torque

1
7
to
2

0

kg
m

12
to

14
ft
Ib

Then
secure

brake
hose
to
the

bracket
with
lock

plate
so
as
not
to

twist
or

abnormally
bend
the
hose

Note

After

connecting
brake
hose

at

both
eiuIs

pay
keen
attention
not

to
twist
the
hose
when
additional

tightening
is

required

Fig
BR

12
Front
brake

hose

Rear

brake
hose

First
secure
rear
brake
hose
to

3

way
connector
on
rear
axle
case
to

the

specifications
Mter

connecting

hose
do
not

tighten
it

at
3

way

connector

additionally
since
this

oper

ation

causes
hose
to
be
twisted

Tightening

torque

I
7

to
2
0

kg
m

12
to
14
ft
Ib

BR
8
Fig
BR
13
Rear
brake
ho
e

After
brake
hose
has
been
installed

check

to
be

sure
that
there
is

enough

clearance
between
hose
and

adjacent

parts
to
avoid
contact
with
other
ones

The
check
should
be
carried
out
while

moving
wheel

up
and
down

through
its

full

stroke
and

rotating
steering
wheel

between
two
extreme
lock

positions

The
wow
clearance
must
be
as

follows

Hose

to

rotating
or

mOving
parts

such
as
tire
and

rim

40
mm
1
57
in

and
more

Hose
to

stationary

part

2S

mm
0

98
in
and
more

In

case
that
the

above
clearance

cannot
be
obtained
it

may
be
caused

by
the
hose

twisted

Accordingly

carry
out
the
correction
with
hose

connection

again
following
the
above

instructions

Brake
tube

In

installing
a
brake
tube
use
care

to
locate
its

end

squarely
on

mating

seat

noting
the
fact
that
nut
can
be

turned

freely
by
a

light
finger
twist

Then

tighten
to
correct

torque
with
a

Brake

Pipe
Torque
Wrench

GG943
10000

Tightening
torque
Flare
nut

1
5
to
1

8

kg
m

11
to

13
ft
Ib

In
addition
care
should
also
be

exercised
to
avoid

damaging
or
col

lapsing
brake
tube

during
operation

Be
sure
to
make

enough
clearance

between
all
tubes
and
other

adjacent

parts
to
avoid
contact

In

installing
tube

through
hood

ledge

grommet
be
sure
to

position
it

at
the

center
of

grommet

After

connecting
brake
tube
be

sure
to

check
the
clearance
to

prevent

from

damage
The
clearance
at

the

following
portions
must
be

specified

distance
or

more

Tube
to

body
panel
and

frame

Over
5

mm
0
20
in

Tube

to
edge
of
each

panel

Over
10
mm
0
39

in

Tube
to
tube

Loop
pitch

OVer
5
mm
0
20
in

Between
front
tube
and

rear
tube

Over
9

mOl
0
35

in

Tube
to

moving
parts

Over
10
mm
0
39
in

Loop
tube
to

hood

ledge

panel

Over
10

mm
0
39
in

Notes

a
Brake
tubes
are

shaped
at

factory

to
secure

specified
clearance
and

may
not

require
reshaping
Discard

if

they
call
for
excessive

reshaping

b
In

reshaping
a
brake
tube
take
care

to
avoid

damaging
galvanization
or

collapsing
section

Mter
brake
lines
have
been

asssem

bled
check
to
make
sure
that
all

fittings
and
flare
nu
Is
ale

lightened
to

correct

torques

Tightenint
torque

Brake
tube
to
connector

I
Ston

kg
m

II
to

13
ft
Ib

Brake
tube
to
brake
hose

1
7
to

2
0

kg
m

12
to
14
ft
lb

Connector
and

clip
fixing
bolt

O
3S
to
O
4S

kg
m

2
5

to
3
3

ft
lb

3

way
connector

fixing
bolt

on
rear

axle
case

0
8
to
1
1

kg
m

6
to
8
ft
lb

N
L
S
V

DESCRIPTION

The

Nissan
Load

Sensing
Valve

N
L
S
V

serves
to

change
braking

power
of
the

rear
wheels
in

response

to

changes
in
the
load
and
fluid

pressure
improving
braking
stability

and

shortening

stopping
distances
Brake

System

The
N
L
S
V

is
installed
on
the

frame

being
inclined
at
10

degrees
A
summary
of

the
N

L
S
v

operation
is

given
in

Figures
BR
14

and
BR
15

r
Master

cylinder
TI
II

I

y

1

J

I

l
Attaching
angle

D

Wheel

cylinder

BR928

Fig
BR
14
Construction

of
N
L
S
V

Performance
curve
of
brake
fluid

pressure
is
as

follows

0

S

c
A

0

C

o

l
0
oadea

U1U

Front
wheel

cylinder

fluid

pressure
BR769

Perfonnance
curve

of
fluid

pressure
Fig
BR
15

N
L
S
V
TEST

the

following
occurs

When
rear
wheels
lock

stopping

distance
is
shorter
than
13
1

m
43

0

ft
whether
loaded
or
unloaded

Stopping
distance
should
be

measured

from
the

place
where
the
brake

pedal

is

first

applied
to
the

place
the
vehicle

actually

stops
Front
wheels
lock

simultaneously
with
or
ahead
of
rear

wheels
Operating
test

The

test
should
be
conducted
under

these
conditions

Drive
a
vehicle
with

pay
load
and

then
with

only
driver
on

a

dry
flat

concrete
or

asphalt
road

applying
the

brake
suddenly
at
40
km

h
25
MPH

N
L
S
V
is

functioning
normally
if

BR
9

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

REMOVAL

Referring
to

Figure
BR
29

remove

parts
in
numerical
order

enumerated

1

cD
2

BR17S

Fig
BR
29
Removal
method

of

Mcuter
Vae

DISASSEMBLY

When

disassembling
Master
Vac

ob

serve
the

following
instructions

a

Thoroughly
clean
mud
or
dust
from

Master
Vac

b
Extreme

care
should
be
taken
not

to
allow
dirt
dust
water
or

any

other

foreign
matter
into

any
com

ponent
parts

Be

sure
to

select
a
clean

place

before

disassembly
or
assembly

c
Mark

mating
joints
so
that

they

may
be
installed

exactly
in
their

original

positions

d

Keep
all
disassembled

parts

arranged
properly
so
that

they
may

readily
be
assembled

at

any
time

e
Clean
rubber

parts
and

synthetic

resin

parts
in

alcohol

f
Mter
all
disassembled

parts
are

cleaned
in
a

suitable
clean
solvent

place
on
a
clean
work
bench
Use

care
not
to
allow

dirt
and

dust
to

come
into

contact
with
these

parts

1
Install

spacer
on

rear
shell

spacer

temporarily
Place
Master
Vac
in
a

vise
Use
soft

jaws

2

Remove
clevis
and
lock
nut
De

tach
valve

body

guard

rW

ID

1

Clevis

2
Lock

nut
3
Valve

body

guard

BRD7S

Fig
BR

30

Removing
rear
hell
Brake

System

3

Identify
front
shell
and

rear
shell

clearly
so
that

they
may
be
reassem

bled
in
their

original

positions
from

which

they
were
withdrawn

Bolts

attached
on
dashboard
are

not
the

same
in

pitch

4

Using
Master
Vac
Wrench

ST08080000
remove
rear
shell
seal

assembly
and
disassemble

diaphragm

plate
assembly
front
shell

assembly

diaphragm
spring
and

push
rod

assem

bly

f

Q
BA076

Fig
BR
31

Removing
reor
shell

Rear
shell
seal

Pry
off
retainer
with

use
of

screw

driver

as
shown
and

detach

bearing

and
seal

Note
Do

not
disassemble
seal
assem

bly
unless

absolutely
necessary

Whenever
this
is
to
be

removed
use

care
not
to

damage
it

BRD7S

Fig
BR
32

Removing
retainer

Diaphragm
plate

Place

diaphragm
plate
assembly

on

a
clean
work
bench
Detach
dia

phragm
from

groove
in

plate
as
shown

BR
16
BA079

FlIf
BR

33

Separating

diaphragm

2

Using
a
screwdriver

as
shown

evenly
pry
air
silencer
retainer

until
it

is
detached
from

diaphragm
plate
as

sembly

Note
Never

use
a

hammer
to

remove

this
retainer
since
this
win
be
the

sure

y
of

damaging
it

BA322

Fig
BR
34

Removing
air
silencer

retainer

3
Pull

out
valve

plunger

stop
key

and
withdraw
silencer
and

plunger

assembly

Note
To

remove
valve

plunger

stop

key

properly
proceed
as

follows

With

key
hole

facing
down

lightly

push
valve

operating
rod
simulta

neously
while

applying
vibration
to

it

BA180

Fig
BR
35

Pulling
out

top
key

3

Align
marks
scribed
in
the

rear

shell

and
front
shell

Carefully
turn
the

Master
Vac
Wrench
ST08080000

clockwise
until
it
reaches
notch
in

shell

retainer

Fig
BR
43

Tightenilll
reor
shell

4

After

assembly

adjust
the

length

of

push
rod
to
less
than
the

specified

value
indicated
below

Length
adjust

ment
of

push
rod
is

made
at
the

tip
of

push
rod

HAND
BRAKE
Stick
lever

typ
e

REMOVAL

HAND
BRAKE

Stick

lever

type

The
hand
brake

system
is
of
a
cable

reaction

type
which
actuates
rear
Brake

System

Length
B

10
0

to
10
5
mID

0
394

to
0
413
in

rl

J

BA290

Fig
BR
44

Lelll
th
at

B

Fig
BR
45

Adjusting
push
rod

length

HAND
BRAKE

CONTENTS

BR
18

BR
19
INSPECTION

INSTALLATION

wheel
brake

shoes
All

the
cable
ad

justment
can
be
made

by
operating

BR
18
INSTALLATION

Install
in
the

reverse

sequence
of

removal

Tightening
torque

Master

cylinder
to

Master
Vac

0
8

to
I

1

kg
m

6
to
8
ft
lb

Master

Vac
to

body

0
8

to
1
1

kg
m

6
to

8
ft
Ib

Note

After
Master
Vac
is

properly

installed
on
vehicle
be
sure
to

conduct
an
air

tight
test
and

oper

ation
test

described

previously
in

this
section

BR
19

BR
19

only

adjusting
nut
at
balance
lever

1
Control
bracket

2
Control
lever

3
Control
stem

4
Front

cable

5

Balance
lever

6
Rear
cable
R
H

7

Rear
cable
L
H

REMOVAL

Control
stem

I

Disconnect

terminal
from
hand

brake

warning
switch

2

Remove
nuts

securing
control

bracket
in

place
on
dash

panel
Brake

System

BAS6l

Fig
BR

46
Hand
brake

linkage

3

Pull
out
lock

pin
and
colter

pin

and

then

remove
control
stem

assem

bly

y
J

b
i1

I

I
1

II

i

l

I
BR773

Front

cable

Fully
release

control
stem

2

Loosen

adjusting
nut
at
balance

lever

3

Disconnect
front
cable
from
con

trollever

4

Remove
retainer

spring
at

cable

guide
bushing
Fig
BR

47
Control

stem

5

Disconnect
rear
cables
R
H
and

L
H
from
balance
lever
brackets

See

Figure
BR
48

6
Remove
balance
lever
brackets

from
crossmember

7

Detach
front
cable

clip
and

pull

front
cable

rearward

BR
19
k

1

BR663

Fig
BR
48
Balance
lever

Rear
cable

Fully
release
control

stem

2

Remove
both
rear

brake
drums

and
disconnect
rear
cable
from

toggle

lever

3

Detach

spring
and

spring
retainer

4

Remove

rear
cable
from
brake

disc

5

Disconnect
rear

cable
from

balance
lever
bracket

6

Detach
cable

clips
and

remove

rear
cable

INSPECTION

1

Check
control
stem
and
ratchet

for

evidence
of
wear
or

other

damages

Replace
parts
which
are

faulty

2

Replace
worn
or

fatigued
springs

3

Check
wires

for
evidence
of
dis

continuity
or
other
deterioration
Re

place
if

necessary

4

Replace
faulty
warning
light

and
or
switch

S

Check

parts
at
each
connection

and
if
found
deformed

or

damaged

replace

INSTALLATION

Install

hand
brake

assembly
in
the

reverse

sequence
of
removal

by
closely

observing
the

following
instructions

When

installing
apply
a

coating

of

grease
to

sliding
contact
surfaces

Make
Sure
that

each
sliding

part
func

lions

smoothly

2

Upon
completion
of
installation

of
hand
brake

assembly

adjust
the

entire

system
referring
to
the
instruc

lions
described
under

topic

Adjust

ment

3

Make
sure
that
each
cable
is

not

interfered
with

by

any

adjacent
parts

Do
not

apply
an
undue
stress
to

cables

Brake

System

Tightening

torque

Master

cylinder
to
Master
Vac

kg
m
ft
Ib

0
8
to
l
l
6

to
8

Brake
tube

flare
nut

kg
m

ft
Ib
I
S

to
1
8

II
to
13

Brake

hose
connector

kg
m

ft
lb
1
8
to
2
1
13
to
IS

Air

bleeder
valve

kg
m
ft
lb

0
7
to
0

9
S
to
7

Fulcrum

pin
of
brake

pedal
kg
m

ft
Ib
1
2
to

1
5
9
to
II

Connector
and

clip

fIXing
bolt

kg
m
ft
lb

0
35
to
O
4S

2
5
to
3
3

3

way
connector

fIXing
bolt

kg
m
ft

Ib

0
8
to
l
l

6
to
8

on
rear
axle

case

Brake

pedal
stopper
lock
nut

kg
m
ft
Ib
1
2

to
1
5

9
to
II

N
L
S
V

to

body

kg
m
ft
Ib
0
8
to
l
l

6
to
8

Wheel

cylinder

mounting
nut

Front

kg
m
ft

Ib
S
4

to
6
6
39

to
48

Rear

kg
m
ft
Ib

1
5
to
1

8
II

to
13

Wheel

cylinder
connector
bolt

kg
m
ft
lb
1
9

to
2
5

14
to
18

Brake
disc
Back

plate
nut

Front

kg
m
ft

Ib
4
2
to
S

O
30
to
36

Rear

kg
m
ft

Ib
S
4

to
6
4
39
to
46

Master
Vac

Master

Vac
to

body
nut

kg
m
ft
lb
0

8
to
l
l
6
to
8

Flange
to

shell
cover
nut

kg
m
ft
lb

0
8
to
1
1
6
to

8

Operating
rod
lock
nut

kg
m

ft
Ib
1
6
to
2
2
12
to

16

Push
rod

adjusting
nut

kg
m

ft
Ib
1

9
to
2
4
14
to
17

BR
21