1979 DATSUN 210 brake fluid

Relationship
between
oil

pressure

and

pedal
operating
force
is

illustrated

in

Fig
BR

29
If
test

results
are
not

as

specified
in

Fig
BR

29
check
brake

booster
for
condition
in
manner
des

cribed
under

Inspection
before
re

moval
of

this
unit

REMOVAL
M60

120
1
710

AA
I
1

1

110
1
560
1
v

e
100

1
420
I

90
1

280
I
1

1

80
1
140
I
Z

I
t

70
1

000
i

60
850

I

o
50
710
d

40
570

g
i

gl

j
ll
10

140

J
0

1
0

2
0

221
441

Rod

operating
force

kg
lb
Brake

System

Also

check
brake
line
for

evidence

of
fluid

leakage

Note

Detennine
whether
source
of

problem
is
in
brake
booster
or

check
valve
Before

you
reach

a

fmal
conclusion

always

inspect

check
valve
first

o
10
20

30
40
50

22
44

66
88
110

Pedal

operating
force

kg
lb

BA121A

Fig
BR
29

Performance

Diagram
of
Brake
Booster

Remo

parts
in

numerical
order

enumerated

BR593
ti

J

Fig
BR
30
Procedures

for
Removing

Brake
Booster

ADJUSTMENT

I

Adjust
the

length
of

push
rod
to

the

value
indicated
below

Length
ad
justment
of

push
rod
is

made
at
the

tip

of

push
rod

Length
A

9
75
to
10
00
mm

0
3839

to
0
3937
in

j
f

Irl

I

l
if

L
J

BA290

Fig
BR
31

Length
A

BR
13
BR288

Fig
BR
32

Adjusting
Push
Rod

Length

2

Install

clevis

Adjust
length
of

operating
rod
to

specified
value

length
B

135
mm
5
31
in

c
f

lIJ
t

t

B

BR947

Fig
BR
33

Length
B

INSTALLATION

Install

in
the

reverse

sequence
of

removaJ

IiJ
Tightening

torque

Master

cylinder
to
brake
booster

0
8
to

1
1

kg
m

5
8

to
8
0
ft
Ib

Brake
booster
to

body

0
8

to
1
1

kg
m

5
8

to
8

0
ft

lbl

Note

After
brake
boOster
is

properly

installed
in

car
conduct
an
air

tight

and

op
rational
tests
as

previously

described

Brake

System

TROUBLE

DIAGNOSES

AND
CORRECTIONS

Condition

Excessive

pedal
travel

Spongy
pedal

Poor

braking
effect
Probable
cause

Low
brake
fluid

level
or

empty
master

cyUnder
reservoir

Leakage
in

master

cylinder

Deteriorated

check
valve

Air
in

system

Faulty
brake

adjustment

Excessive
lateral

play
on
disc
caused

by

loose
or
worn
wheel

bearings
or

steering

parts

Low

fluid
level
in
master

cylinder

Air
in

system

Faulty
brake

adjustment

Reservoir
fIller

cap
vent
hole

clogged

Swollen
hose
due

to
deterioration

or
use
of

poor
quality
hose

Distored

brake
shoes
or

excessively
worn

or

cracked
brake
drum

Soft
or
swollen

caliper
seals

Use
of
a

brake
fluid

with
too
low

boiling

point

Fluid

leakage
in
brake
lines

Low

brake
fluid
level
or

empty
master

cylinder
reservoir

Air
in
brake

lines

Excessive
shoe

to
d
rum
clearance

Grease

oil
mud
or
water
on

linings
or

pads

Deterioration
of

linings
or

pads

Local
fit

of

linings
or

pads

Linings
or

pads
excessively
worn

Master

cylinder
or

wheel

cylinders
in

poor

condition

Frozen
or

seized

caliper
pistons
on
disc

brakes

Finding
mechanical

linkage
at
brake

pedal

and
shoes

BR
19
Corrective
action

Fill
and

bleed
as

necessary
Test

for
source

of

leakage

by
examining
all
lines

connec

tions
and
wheel

cylinder

Overhaul
master

cylinder

Replace
check

valve
and
bleed

system

Bleed

system

Adjust
shoe
to
drum
clearance

Inspect

auto

adjuster
operation

Replace
or

adjust

faulty
parts

Top
with
fluid
and

inspect
for

leakage

Correct
as

necessary

Adjust
shoe
to
drum
clearance

Inspect

auto

adjuster
operation

Clean
and
bleed

system

Replace
hose
and
bleed

system

Replace
faul

ty
parts

Drain

hydraulic

system
flush
with
alcohol

and

replace
all
seals

Replace
with

specified
brake
fluid
and

bleed

system

Check
master

cylinder
p
pmg
and

wheel

cylinder
for
leaks
and

repair

Fill
and
bleed

as

necessary

Bleed

system

Adjust

Clean
brake
mechanism
and
check
for

cause

of

problem
Replace

linings
or

pads

Replace

Shave
or

replace

Replace

Repair
or

replace

Disassemble

caliper
and
free

up
as

required

Free

up
as

required

Condition

Unbalanced
brakes

Brakes
fade

Brakes

drag
Brake

System

Probable

cause

Improper
tire
inflation

Improp
r

adjustment
of
shoe
to
drum
clear

ance

Grease
oil
mud
or
water
on

linings
or

pads

Mud
in
brake
drum

Deterioration

oflinings
or

pads

Excessi
wear
of

linings
or

pads

Wheel

cylinder
in

poor
condition

Poor

sliding
condition
of
brake
shoe

Looseness
of

cylinder
body
or

back

plate

securing
bolts

Scored
or

out
f
round

drums

Sticking
wheel
cylinder

cups

Deformation
of
back

plate

Incorrect

adjustment
of
wheel

bearings

Incorrect

adjustment
of
wheel

aligoment

Looseness
of
leaf

spring
securing
U
bolts

Brake
fluid

has
too

low

boiling
point

Use
of

improper

linings
or

brake

linings
are

contaminated

Brake
drums
are

out
f

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

Poor
condition
of

caliper
because
of

faulty

piston
seals

Excessive
runaut
of
rotor

Hand
brake

will
not
return

Clogged
m

ter

cylinder
return

port

BR
20
Corrective
action

Inflate

to
correct

pressure

Readjust

Clean
brake
mechanism
and

check
for

cause

of

problem
Replace

linings
or

pads

Clean

Replace

Replace

Repair
or

replace

Adjust

F
ten
or

replace

Recondition
or

replace
brake
drum
as
re

quired
Check
for

improper

lining
contact

with

dflllll
and

grind
lining
if

necessary

Recondition
or

replace
cylinder

Replace

Adjust
or

replace

Adjust

Tighten
or

replace

Drain
and
fill

system
with

appr
d
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

Replace
piston
seals

Turn
rotor
on
lathe
or

replace

Check
and

repair

Clean

Condition

Brakes

drag

Brake
chatters

Brake

squeals

Pedal

pulsates

Rear

lock

under

light
brake

pedal
force

Rear

lock

under

heavy
brake

pedal
force
Brake

System

Probable
cause

Clogged
brake
lines

Incorrect

adjustment
of
wheel

bearings

Improper
shoe
to
drum
clearance

Weak
shoe
return

springs

No

free
travel
in

brake
shoe
return

Groove

or
out
of
round
brake
drum

or
rotor

Loose

or
bent

support
plate

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

On

disc
brakes
lateral
runout
of
brake

rotor

is

excessive

Excessive
variation
in

thickness
of
brake

rotor
surfaces

Improper
tire

pressures

Excessive

wear
of

tires

Faulty
NP
valve

Improper
tire

pressures

Excessive
wear
of
tires

Poor

front

braking
effect

Grease
oil
mud

or
water
on

linings

or

pads

Excessive
wear

of

linings
or

pads

Local
fit
of

linings
or

pads

Master

cylinder
or

wheel

cylinder
in

poor

condition

BR
2t
Corrective
action

Check
and
clean

Adjust
or
repair

Adjust

Replace

Adjust

pedal
height

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
elilninate

glaze
If
it

doesn
t

replace
linings

Turn
drum
or

replace
as

necessary

Check
with
dial
indicator

turning
disc

by

hand
If
runout
exceeds

specifications
re

place
disc

Measure
around
disc
face
with
micrometer

Replace
disc
as

required

Check
and

adjust

Check
and

replace

Replace

Check
and

adjust

Check
and

replace

Clean
or

replace

Replace

Shave
or

replace

Repair
or

replace

CHARGE
WARNING

SYSTEM

Refer

to
Section

EE

BRAKE
WARNING

SYSTEM

REPLACEMENT

Hand
brake

switch

I

Disconnect

battery

ground
cable

2
Remove

console
box
if

equipped

3
Disconnect

hand
brake

switch

lead
wire
at

connector

4
Remove

switch
from

switch

bracket

by
pulling
it

5
Install
new

switch
in
the
reverse

order
of
removal

BE

177C

Fig
BE
23
Hand
Brake
Switch

Brake
fluid
level
switch

Brake
fluid
level
switch
is
buiit

into
brake
master

cylinder

cap

The

cap
can
be

easily
removed

by

twisting
it
after

disconnecting
lead

wire
terminals
Then

replace
it

OIL
PRESSURE

WARNING

SYSTEM

REPLACEMENT

011

pressure
switch

To

replace
oil

pressure
switch
dis
Body
Electrical

System

WARNING

SYSTEM

connect
lead
wire

from
switch
termi

nal
and

unscrew
switch

Oil

pressureswltch

BE247

Fig
BE
24

Oil
Pres5ure
Switch

@

SEAT
BELT

WARNING

TIMER

8

SEAT
BELT
J

WARNING

LIGHT

REMOVAL
AND

INSTALLATION

Warning
buzzer

Disconnect

battery
ground
cable

2
Remove
instrument
lower
cover

and
cluster
lid
B

compartment

3
Disconnect

buzzer
wire

con

nector

4
Remove

screws

retaining
buzzer

assembly
and
then
take
out
buzzer

assembly

5

Installation
is
in

the
reverse
order

of
removal

BE15
SEAT
BELT

WARNING
SYSTEM

DESCRIPTION

This

system
consists
of
an

ignition

switch

a
timer
unit

a

warning
light
a

driver
s

seat
belt
switch

and
a

warning

buzzer
and
is

designed
to
remind
the

driver
to

buckle
his

seat
belt

When
the

ignition
switch
is

turned

to

the
ON

position
the

warning

light
comes
on
and
remains
on
for
4
to

8

seconds
At
the

same
time
the

warning
buzzer
sounds
for
4
to

8

seconds

intermittently
if
the

driver
s

seal
b
lt
is

not
fastened

properly
The

buzzer
is

also
used
as
a

theft

warning

buzzer
and
back

up
warning
buzzer

only
for
5

speed
manual
transmission

model

2

3

BUZZER
SEAT

BELT

SWITCH

l

BE1270

Fig
BE

25
Seat
Belt

Warning
System

11

BE128D

Fig
BE
26

Warning
Buzzer

Body
Electrical

Sy
tem

Oil

pr
re
charg
and
brake

warillng

Condition

Lamp
does
not

glow

when

ignition
switch

is

turned
ON
with

out

running
engine

Door
and

charge

warning
lamps
do
not

go
out
when

engine
is

started

Charge
waming
amp

Lamp
does
not

go
out

when

engine
is
started

Oil

pressure
warning

lamp

Lamp
does
not

light

when

ignition
switch

is

set
to

ON

Lamp
does
not

go
out

while

engine
is

being

operated

Brake

warning
lamp

Lamp
does
not

go
out

Door

warning
lamp

Lamp
does
not

glow

with
door

opened
and

engine
running
Probable
cause

Burnt
bulb
or

loo
ebulb

Loose
or

poor
connection

Faully
bulb
check

relay
or
alternator

Faully
charging
system

Faully
oil

pressure
switch

or
loose

switch

terminal
connection

When
lead
wire
connected
to

switch
is

grounded
warning
lamp
lights

Lack
of

engine
oil

Oil

pressure
too
low

Faully
oil

pressure
switch

Faulty
hand
brake

switch

When
hand
brake

lever
is

released

Faully
brake

fluid
level
switch

When
brake

fluid
level
is
normal

Faully
door

switch

BE
46
Corrective
action

Replace
bulb
or
correct

Correct

connector
terminal

contacts

Correct

adjust
or

replace

Inspect
charging
system

Replace
or

correct
connection

Check
oil
level
and
add
oil

as

required

Inspect
engine
oil

pressure
system

Replace

Replace

Replace

Replace