1977 DATSUN PICK-UP key

Emission
Control

System

EARLY

FUEL

EVAPORATIVE

SYSTEM
E

F
E

DESCRIPTION
spring
and

counterweight
which
are

assembled
on
the

valve
shaft

projecting

to
the

rear
outside
of
the
exhaust

manifold
The

counterweight
is
se

cured
to
the
valve
shaft
with

key
bolt

and

snap
ring
EC
4
A

control
valve
welded
to

the

valve
shaft
is

wtalled
on
the

exhaust

manifold

through

bushing
This
con

trol

valve
is

called
Heat

control

valve
The
heat
control

valve
is

ac

luated

by
the

coil

spring
thermostat
Construction
of
the

early
fuel

evap

orative

system
is

shown
in

Figure

r
I

1

@

rW

9

Sc
w

10
Thennostat

spring

11

Coil
spriiig

12
Control
valve
shaft

13
Heat
control

valve

14

Bushing

15

Cap

16
Exhaust
manifold
1
Intake
manifold

2
Stove

gasket

ManifoktstOve

4
Heat
shield

plate

5

Snap
ring

6

Counterweight

7

Key

g

Stoppel
pin

EC532

Fig
EC
4
Early
Fuel

Evaporutive
tem
E
F
E

The

early
fuel

evaporative
system
is

provided
with
a
chamber
above

a

manifold
stove
moonted
between
the

intake
and
exhaust

manifolds

During

engine

warming
up
air
fuel
mixture
in

the

carburetor
is

heated
in
the
cham

bet

by
exhaust

gases
This
results
in

improved
evaporation
of

atomized
fuel

droplets
in
the
mixture
and
in

smaller

content
of

hydrocarbons
He
in
the

exhaust

gas
especially
in

cold
weather

operation

The
exhaust

gas
flow
from
the

engine
is

obstructed

by
the
heat
con

trol

valve
in
the

exhaust
manifold
and
is

changed
in

direction
as
shown

by

the
solid

lines
in

Figure
EC
4
The

exhaust

gas
heats
the
manifold
stove

Open
close

operation
of
the

heat

control
valve
is
controlled

by
the

counterweight
and
thermostat

spring

which
is
sensitive
to
the

ambient
tem

perature
around
the

exhaust
manifold
With
this
condition
the

heat
control

valve
is
in

the

fully
closed

position

obstructing
the
flow
of

exhaust

gas
As

engine
tempera
lure

goes
up
and

the

ambient

temperature
becomes

high

enough
to
actuate
the
thermostat

spring
the

counterweight
begins
to

rotate
clockwise
and

again
comes
into

con

tact
with

the

stopper
pin
With
this

condition
the

heat
control
valve
is
in

the
full

open
position
and
exhaust

gas

passes
through
the
exhaust
manifold
as

shown

by
the
dotted

lines
in

Figure

EC
4
without
heati

ng
the
manifold

stove
OPERATION

The

counterweight
rotates
counter

clockwise
and

stops
at

the

stopper
pin

mounted
on
the
exhaust

manifold

while

the

engine
temperature
is
low

EC
6

REMOVAL
AND
INSTAUATION
Emission
Control

System

EC533

Remove

snap
ring
D
and
lock
bolt

@
and
the

following
parts
can
be

detached
from
heat
control
valve

shaft

Key
00

Counterweight
@

TherI
lostat
spring
CID

Coil

spring

@

Note
As

previously
descnoed
heat

control
valv

1
is

welded
to
valve

shaft

@
at
exhaust
manifold
and

cannot
be

disassembled

To
install

reverse
the
removal

pro

cedure

INSPECTION

I
Run

engine
and

visually
check

counterweight
to

see
if
it

operates

properly

1
For
some
time
after

starling

engine
in
cold
weather

counterweight

turns
counterclockwise
until
it

comes

into
contact
with

stopper
pin
installed

to

exhaust
manifold

Counterweight
gradually
moves

down
clockwise
as

engine
warms

up

and

ambient

temperature
goes
higher

around
exhaust
manifold

2
When

engine
speed
is

increased

discharge

pressure
of
exhaust

gases

causes

counterweight
to

move
down

ward
clockwise

3

When
heat

con
trol
valve
is
in
the

full

open
position
coun

terweight

moves
further
clockwise
exceeding
the
1

Snap
ring

2

Lock
bolt

3

Key

4

Counterweight

5
Thermostat

spring

6
Coil
spring

7

Heat
control
valve

8
Valve
shaft

9
Stove
gasket

10
Manifold
stove

11
Heat
shield

plate

Fig
EC
5

Exploded
view
of
E
F
E
stem

position
described
in
1

1
above

and

stops
again
coming
into
con
tact
with

stopper
pin

j

EC246

1

Counterweight

2
S

topper
pin

3
Heat
control
valve

Fig
EC
6

Operation
of
counterweight

when

engine
is
cold

EC246

1

Counterweight

2

Stopper
pin

3
Heat
control

valve

Fig
EC
7

Operation
of
counterw
ight

when
ngine
is
hot

EC
7
2

With

engine
stopped
visually

check
E
F
E

system
for
the

following

items

1
Thermostat

spring
for
dismount

ing

2

Stopper
pin
for
bend
and
count

er

weight
stop

position
for

dislocation

3

Check
heat
control
valve
for

malfunction
due

to
break
of

key
that

locates
counterweight
to

valve
shaft

4
Check
axial
clearance
between

heat
control
valve
and
exhaust
mani

fold
Correct
clearance
is

0
7

to
1

5

mm
0
028
to
0
059
in

5
Check
welded

portion
of

heat

control
valve
and
valve
shaft
for

any

indication
of
crack
or

flaking

6
Rotate
heat
control
valve
shaft

by
a
finger
and
check
for

binding

between
shaft
and

bushing
in

closing

and

opening
operation
of
heat

control

valve
If

any
binding
is
felt
in

rotating

operation
move
valve

shaft
in
the

rotation
direction
several
times
If

this

operation
does

not
correct

binding

condition
it
is
due
to
seizure
between

shaft
and

bushing
and
exhaust
mani

fold
should
be

replaced
as
an
assem

bly

CHECKING
SPARK

TIMING
CONTROL

SYSTEM

DESCRIPTION

The

spark
tirnin
control

system

serves
to
control
the
distributor
vacu

um
advance
under

varying
travelling

conditions
so
as
to
reduce
HC
and

NOx
emissions

This

system
is
installed
on
non

California
automatic
transmission

models

SPARK
DELAY
VALVE

Automatic
transmission

models
only

This

valve
delays
vacuum

spark

advance

during
rapid
acceleration
it

also
cuts
off
the

vacuwn

spark
advance

immediately
upon
deceleration
The

valve
is

designed
for
one

way
opera

tion
and
consists
of
a
one

way
umbrel

la
valve
and
sinlered
steel
fluidic

restrictor

I
Emission

Control

System

Ignition
switch

Ignition

key
Off

T

I

I

I

Battery

I

J

77

77
Relay

J

Floor

temperature

sensing
swi

tch
Floor

temperature

warning

lamp

77
77

EC332

Fig
EC

70
Win

ng
diagram
of
floor
temperature
warning
system

r
l

J
@

1

Floor

temperature

Ij

cr

EC556

Fig
EC
71
Location

of
iJoor

temperature
sensing
switch

OPERATION

Floor

temperature
will
exceed

nor

mal
level

when

temperature
rise
in

the

exhaust

system
succeeding
the
cata

lytic
converter
is
caused

byeilher
an

engine
malfunction

or
severe

driving

conditions

Under
this
condition
the

floor

temperature
sensing
switch
turns

off

causing
the

starting
switch
line
of

the
floor

temperature
relay
to
turn
off
and
the

ignition
switch
line
to
turn
on

as
a
result
the
floor

temperature

warning

lamp
comes
on

When
the
floor

temperature
is

lower
t

an
the

specific

temperature

the

floor

temperature
sensing
switch

turns

on
The

ignition
line

of
the
floor

temperature
relay
turns
off
while
the

starting
switch
side
is
in

on
The
floor

temperature
warning

lamp
goes
out

EC
2B
The

lamp
is

functioning
sa
tis

factorily
if

it
is
remains
on

while
the

starting
motor
is
in

operation
The

lamp
goes
out
when

the

ignition

switch
is
in

IG

position

The

foUowing
chart

furnishes
the

information
on

the

relationship
be

tween

floor

temperatures

warning

lamp
and

sensing
switch

L

Contact
close

ECJ40

I

Contaclopen

ECJ41

Fig
EC
72

Operation

of
floor

t

mperature
sen6ing

6witch

REMOVAL

Floor

temperature

sensing

switch

1
Remove
seat

Seat
section
of

service
manual

2
Remove

sensing
sWitch
as
outlined
in

the

Body
and
Frame

floor

temperature

Floor

temperature
relay

From
under

relay
cover
remove

this

part
Refer
to

Figure
EC
73

Floortemperature

EC783

Fig
EC
73
Location

of
floor

ttmperature
relay

OPERATION

When
the

ignition
switch
turned

fully
clockwise
to
the
START

posi

tion

battery
current
flows

through

series

and
shunt

coils
of
the

solenoid

magnetizing
the

solenoid

The

plunger
is

pulled
into
the
solenoid

so
that

it

operates
the
shift
lever

to

move
the

drive

pinion
into

the

flywheel
ring
gear
Then
the

solenoid

switch

contacts
close
after
the

drive

pinion
is

partially
engaged
with
the

ring
gear

Closing
of
the

solenoid
switch

contacts
c
uses
the

motor
to
crank
the

engine
and
also
cut
out
the
series

coil
of

the
solenoid
the

magnetic

pull

of
the
shunt

coil

being
sufficient

to

hold
the

pinion
in

mesh
after
the

shifting
has
been

performed

After
the

engine
starts

running
the

driver

releases
the

ignition
key
and
it

automatically
returns
to
the

ON

posi

tion

The
torsion

spring
then

actuates
the

shift
lever

to

pull
the

pinion
which

allows
the

solenoid
swi

tch
contacts
to

open

Consequently
the

starting
mo

tor

stops
Engine
Electrical

System

I

I

Ring
gear

2

Shift
lever

guide

3
Armature

4

Battery

5
Field
coil

6

Stationary
contact

7
Monble

contactor

More

positive

meshing
and

demeshing
of

the

pinion
and
the

ring

gear
teeth
are

secured

by
means

of
the

overrunning
clutch
The

overruIUling

clutch

employs
a
shift

lever
to
slide

the

pinion

along
the

armature
shaft

EE
6
F

l
cp

o

r

1

I
I

W

m

EE274

8
Shunt
coil

9

Plunger

10

Ignition
switch

11

Series
coil

12
Torsion

spring

13

Shift
lever

14

Pinion

Fig
EE

7
Starting
motor
circuit

into
or

out
of

mesh
with
the

ring

gear

teeth
The

overrunning
clutch
is

de

signed
to
transmit

driving

torque
from

the
motor
armature

to
the

ring
gear

but

prevent
the

armature
from
over

running
after
the

engine
has
started

Manual

Transmission

4
SPEED

TRANSMISSION
TYPE

F4W71B

CONTENTS

DESCRIPTION

REMOVAL

DISASSEMBL
Y

TRANSMISSION
CASE

DISASSEMBLY

D

ISASSEMBL
Y
OF
GEAR

ASSEMBLY

REAR

EXTENSION

DISASSEMBLY

ADAPTER

PLATE

DISASSEMBLY

INSPECTION

TRANSMISSION

CASE
AND

REAR

EXTENSION
HOUSING

BEARING
GEARS
AND
SHAFTS

BAULK
RING

Oil

SEAL

ASSEMBL
Y

FRONT

COVER
ASSEMBLY

REAR

EXTENSION
ASSEMBLY

ADAPTER

PLATE

ASSEMBLY

GEAR

ASSEMBLY

TRANSMISSION

ASSEMBLY

INSTALLATION
MT
2

MT
4

MT
4

MT
4

MT
5

MT
B

MT
8

MT

8

MT
B

MT
8
MT
8

MT
9

MT

9

MT
9

MT
9

MT
9

MT
9

MT
9

MT13

MT14

DESCRIPTION

pUshed
the
inner

teeth
of
the

coupling

sleeve
slide
over
the

synchronizer
hub

and
mesh
with

the
outer
teeth

which

are

provided
on
the
mainshaft

gear

The

synchronizer
hub
is
fitted
to

the
mainshaft

by

splines
so
the
main

shaft

gear
turns
together
with
the

mainshaft

The
baulk

ring
serves
to

synchro

nile

the

coupling
sleeve
and
mainshaft

gear

Placing
the
control
lever
in
reverse

position
brings
the
reverse
idler

gear

into

mesh
with
mainshaft
reverse

gear
The
transmission
is
of
a
4

speed

forward

fully
synchronized
constant

mesh

type
that

uses
helical

gears

The

reverse

gear
is
ofa

sliding
mesh

type
using
spur
gears

In
construction
the

main
drive

gear

is
meshed
with
the

counter
drive

gear

which
is

keyed
to

the
countershaft

The
forward

speed

gears
on
the

coun

tershaft

are
in

constant
mesh
with
the

mainshaft

gears
which
ride
on
the

mainshaft

freely
through
the
needle

bearing
When

shifting
is

accom
The
transmission

assembly
consists

of
three
main

parts
a

transmission

case
with
clutch

housing

adapter
plate

to
which
an

gears
and
shafts
are

installed
and
rear
extension

The
cast
iron

adapter
plate

supports

the
mainshaft
countershaft

reverse

idler
shaft
and
three
fork
rods
and

bolted

at
the
front

to
the

transmission

case
and
at
the
rear
to
the
rear

extension

by
means
of

through
bolts

By
removing
these

through
bolts
all

gears
and
shafts
are

stripped

e

TM

858

1

Front
cover

2
Transmission
case

3

Adapter
plate

4

Bearing
retainer

5

Rear
extension

hOUsing

Fig
MT
1
F4W71B
lrammiasion
case

compon
nt

MT
2

Manual
Transmission

M
in
drlv
g
r

1
Remove
main
drive

gear
snap
ring

and

spacer

2

Remove
main
drive

bearing
with

Bearing
Puller
ST30031000
and
a

suit

able

piess
See

Figure
MT

23

TM349

Fig
MT
23
1

Main
drive
bearing

2
Main
drive

gear

Removing
main
drive

bearing

cl
iiiiiE

l

1

Snap
ring

2

Spacer
3
Main

drive
bearing
with

snap
ring

4
Main
drive

gear

TM350

Fig
MT
24

Exploded
view

of
main
drive

gear

e
q
1

f

1
Countershaft
front

bearing

shim

2
Countenhaft
front

bearing

3

Snap
ring

4
Countenhaft
drive

gear

5

Woodruff
key

6
Countenhaft

1

Countershaft
rear

bearing

8
Reverse
counter

gear

9

Snap
ring
Count
r

h
ft

mbl

Install

Bearing
Puller
STJOO31000

on
countershaft
rear
bearing
press
out

countershaft
rear

bearing
through
a

rod

See

Figure
MT
25

Note
When

pressing
out

bearing
hold

shaft

by
hand
so
as
not
to

drop

shaft
onto
floor

III

TM351

Fig
MT

25

Removing
countershaft

bearing

@
@

j

i

TM352

Fig
MT
26

Exploded
view

of
counte
haft
auembly

MT
7

Malnshaft

assembly

I

Assemble
2nd

gear
needle
bear

ing
2nd

gear
baulk

ring
1st
2nd

speed
synchronizer
assembly
st

gear

baulk

ring
I
st

gear
bush
needle
bear

ing
I

st

gear
steel
ball
and
thrust

washer
on
mainshaft
Before

installing

a

steel
ball

apply
grease
to

it
See

Figure
MT
36

TM358

Fig
MT

36

l
talling
thrust
washer

2

Set
Transmission
Press
Stand

KV311
00400
and

place
adapter
plate

assembly
on
it

See

Figure
MT
37

For

counterman
and
reverse
idler
shaft

For
main5haft
and
reverse

tdler
haft

V31100400

J
UJ

V
TM438

Holes
for
reverse
Idler

shaft

Fig
MT

37
Tromm
inion
PreS3
S
tond

3
Install
mainshaft

assembly
to

adapter
plate
assembly
Be
sure
to

place
bearing
squarely
against
shaft

and

press
it
into

place
on
shaft

gradu

ally
See

Figure
MT

38

KV31100400

TM439

Fig
MT
38

Installing

mai
haft

em

bly
Manual
Transmission

Countershaft

assembly

I
Place
new
woodruff

keys
in

grooves
in

countershaft
and

tap
them

lightly
until

they
are
seated

securely

Use
a

soft
hammer
to

avoid
dam

aging
keys

2

Place

adapter
plate
assembly
and

mainshaft

assembly
so
that

counter

shaft
rear

bearing
rests
on

Transmis

sion

Press
Stand
KV31100400

prop

erly

3
Install
countershaft

into

adapter

plate
by

pressing
it
See

Figure
MT
39

TM440

Fig
MT
39

l
talling
countersha
t

4
Position

3rd

gear
needle

bearing

fnaiiiSh
ifOfd

gear
baulk

ring
and
3rd

4th

synchronizer
assembly
on
the

front
of
mainshaft

S
Ins
iall
thrust
washer

on
mainshaft

and
e
ure
it
with

snap
ring
of

proper

thickness
that
will
fit
the

groove
in

mainshaft
See

Figure
MT
40

Available

snap
ring

No
Thickness
mm
in

I

2

3
1
4

0
055

1
5
0
059

1
6
0
063

TM441

Fig
MT
40

l
talling
snap
ring

MT
l0
Main
drive

gear
assembly

1

Using
Transmission
Adapter

ST23800000

press
main
drive

bearing

onto
the
shaft
of
main

drive

gear

Make
sure
that

snap
ring
groove
on

shaft
clears

bearing

2
Place
main
drive

bearing
spacer

on
main
drive

bearing
and

secure
main

drive

bearing
with
thicker
snap

ring

that
will
eliminate
end

play
See

Figure
MT
4l

Available

snap
ring

No
Thickness
mm
in

2

3

4

5

6
1
80
0
0709

1
87
0
0736

1

94
0
0764

2
01
0
0791

2
08
0
0819

2
15

0
0846

CD

I

TM364

Fig
MT
41
Installing
snap
ring

3

Position
baulk

ring
on
cone
sur

face
of
main

drive

gear

Apply
gear
oil

to

mainshaft

pilot

bearing
and
install
it

on
mainshaft

Assemble
main
drive

gear
assembly

on
the
front

end
of
mainshafl

4

Press
counter
drive

gear
onto

countershaft

with
Counter
Gear
Drift

ST23860000

by

meshing
gears
and

secure
counter
drive

gear
with
thicker

snap
ring
See

Figures
MT
42
and

MT
43

Note

Be

sure
to
drive
in
counter

drive

gear
and
main
drive

gear

simultaneously

In

these
cases
the

transmission
must

be

repaired

Notes

a
In

checking
oil

level
use

special

paper
cloth
to
handle
the
level

gauge
and
be
careful
not
to
let
the

scraps
of

paper
and
cloth
stick
to

the

gauge

b
Insert
the

gauge
fully
and
take
it

out

quickly
before

splashing
oil

adheres
to
the

gauge
Then
observe

the
level

c
Use
automatic
transmission
fluid

having
DEXRON
identifications

only
in
the
3N71B
automatic
trans

mission

d

Pay
attention
because
the
oil
to
be

used
differs
from
that
used
in

the

Nissan
Full
Automatic
TranSJTIis

sion
3N71A
Never
mix
the
oils

INSPECTION
AND
REPAIR

OF
OIL
LEAKAGE

When
oil

leakage
takes

place
the

portion
near
the

leakage
is
covered

with
oil

presenting
difficulty
in

detecting
the

spot
Therefore
the

places
where
oil
seals
and

gaskets
are

equipped
are
enumerated
below

11
Converter

housing

Rubber

ring
of
oil

pump
housing

Oil
seal
of
oil

pump
housing

Oil
seal
of

engine
crankshaft

Bolts
of
converter

housing
to
case

2
Trarismission
and
rear
extension

Junction
of
transm
ss
ion

and
rear

extension
J

Oil
cooler
tube
connectors

Oil

pan

Oil

pressure
inspection
holes
Refer

to

Figure
AT
il2

Mounting
portion
of
vacuum
dia

phragm
and
downshift
solenoid

Breather
and
oil

charging
pipe

Speedometer
pinion
sleeve

Oil
se
l
of
rear
extension

To

exactly
locate
the

place
of
oil

leaka
le
proceed
as
follows

Place
the
vehicle
in

a

pit
and

by

sampling
the
leaked
oil
determine
if
it

is
the

torque
converter
oil
The

torque

converter
oil
has
a
color
like
r
d
wine

So
it
is

easily

distinguished
from

engine

oil
or

gear
oil
Automatic
rransmission

Wipe
off
the

leaking
oil
and
dust

and
deiecl
the

spol
of
oil

eakage

l
se

nonflammable

organic
solve
t
s
ch
as

carbon
tetrachloride
for

wiping

Raise

the
oil

tcmperalure
by

op

erating
the

engine
and

shift
the
lever

to
D
to
increase

the
oil

pressure

The

spot
of
oil

lcakage
will
then
be

found
more

easily

Note
As
oil

leakage
from
the
breaih

er
does
not
take

place
except
when

running
at

high
speed
it
is

impos

sible
to
locate
this

leakage
with

vehicle

stationary

CHECKING
ENGINE
IDLING

REVOLUTION

The

engine
idling
revolution
should

be

properly
adjusted

If
the

engine
revolution
is

too
low

the

engine
does
not

operate
smoothly

and
if
too

high
a

strong
shock
or

creep
develops
when

changing
over

from
N
to
D
or

R

CHECKING
AND
ADJUSTING

KICK

DOWN

SWITCH
AND

DOWNSHIFT

SOLENOID

When

the
kickdown

operation
is

not

made

properly
or
the

speed
chang

ing
point
s
too

high
check
the
kick

down
switch
downshift
solenoid
and

wiring
between
them
When
the

igni

li
n

key
is

pqsitioned
a
t

the
I

st

stage

nd
the
accelerator

pedal
is

depressed

deeply
the
switch
contact
should
be

closed
and
the
solenoid
should
click
If

it
does
not
click
it
indicates
a
defect

Then
check
each

part
with
the

testing

instruments
See

Figure
ATl09

d

I

t

AT10S

Fig
AT
109

Downshift
solenoid

Note
Watch
for
oil

leakage
from

transmission
case

AT
4Q
INSPECTION
AND

ADJUSTMENT
OF
MANUAL

LINKAGE

The

adjustmcnt
of

manual

linkage

is

equaUy
important
as

Inspection
of

Oil
Level
for
the
automatic
transmis

sion
Thereforc

great
care
should
be

exercised
because
incorrect

adjustment

will

rcsult
in
the
brcakdown
of
the

transmission

Inspection

Pull
the
selector
lever
toward

you

and
turn
it

as
far
as
P

to
I

range

wherc
clicks
will
be
felt

by
the
hand

This
is
the

detcnt
of
manual
valve
in

the
valve

body
and
indicates
th

correct

position
of
the

lever

Inspect
whether

the

pointer
of

selector
dial

corresponds
to
this

point

and
also
whether
the
lever
comes

in

alignment
with
the

stepping
of

posi

tion

plate
when
it
is
released

Adjustment

This

procedure
can
be

accomplish

ed

by
refcrring
to

page
AT
35

for

Removal
and
Installa
tion

CHECKING
AND

ADJUSTING

INHIBITOR
SWITCH

The
inhibitor
switch

lights
the
re

verse

lamp
in

the

range
R
of
the

transmission

operatio
l
and
also

rotates

the
starter
motor
in
the

ranges
N

and
P

CD

@
b
ell

If

L
t

7
4l

@

1l

j7
@
@

@
dl

AT109

6
Washer

7
Nut

8
Inhibitor
switch

9
Range
select
lever
t
Inhibitor
switch

2
Manual
shaft

3
Washer

4
Nut

5
Manual

plate

Fig
AT
110
Construction

of
inhibitor

switch