check oil DATSUN PICK-UP 1977 Manual PDF

1st

2nd
shift

valve
FSV

The

FSV
is
a

transfer
valve
which

shifts

gears
from

low
to

second
When

Ihe
vehicle
is

stopped
the

FSV
is

depressed
to

the

right
side

by
force
of

a

spring
located
on
the

left
side

putting
the

FSV
is
in
the

low

position

When
vehicle

speed
increases
the

governor

pressure
15
is

applied
to

Ihe

right
side
of

the
FSV
and
the
FSV

is
forced

toward
the
left

Contrarily

the
line

pressure
I

togelher
with
the

spring
force
force

the
FSV

toward
the

right

opposing
the

governor

pressure

15

When
the

vehide

speed
exceeds
a

certain
level

the

governor
pressure

15
exceeds
the
sum
of
the

throttle

pressure
and
Ihe

spring
force
and
the

FSV
is

forced
toward
the
left

When
the
FSV
is

depressed
10
a

certain

position
the

lire
pressure
I

is

closed
and

only
the

spring

depresses

the

FSV
toward
the

right
and
it
is

depressed
to

the
end
for

a
moment
As

a

resull
the

line

p
ressure

lJ
is
for

warded

to
8
the
band

servo
is

engaged

through
the
SLY

and
the

speed
is
shifted
to
2nd

With
the

accelerator

pedal

depressed
the
FSV

remains
iIi

the
Low

position
unless

the

governor
pressure
IS
increases

to

a

high
leVel

corresponding
to
the
line

pressure
I
since

the

line
pressure

I

increase
when
the
accelerator

pedal
is

depresse9

Contrarily
when

vehicle

speed
de

creases

the

governor

pressure
15

decrease
Howeve
f

the

gear
is
not

shifted
to

Low

nless
the

governor

pressure
15
becomes

zero
since

the

force

depressing
the
FSV
toward
the

right
is

being
delivered

only
by
the

spring

Low
in

range
I
is
led
to

the

low
and
reverse

clutch
from
line

pres

sure
5

through
line

prbssure
12

2nd
is
simultaneousi

y
led
to

the
ieft

end

spring
unit

Consequently
al

thougp
the

goverflor
pressure
in

creases

the
valve
is
still
forced
toward

the

right
and
the
SFV
is

fixedjn
the

Low

position
When
kicked
down
to

the
2nd

speed
the
SDV

operates

and

the
line

pressure
13
forces
the

FSV

toward
the

right
Although
the
Automatic
Transmission

governor
pressure
15
is

considerably

high
the
valve
is

forced

completely

toward

the

right
and
the

FSV
is

returned
to
the

Low

position
This

operation
is

alled

Kickdown
shift

15

j

13

1

c5

I

0

t

r

I

I

q
1

AT091

Fig
AT
12

lsl
2nd

shift
valve

2nd
3rd

shift
valve
SSV

The

SSV
is

a
transfer
valve

which

shifts

gears
from

2nd
to

3rd

When
the
vehicle
is

stopped
the
SSV

is

forced
toward

the

right
by
the

spring
and
is
in
the

2nd

position
It

is

so

design
d
however

that
the
FSV

can

decide
to
shift

either
to

Low
or

2nd

When

the
vehicle

is

running
the

governor
pressure
15
is

applied
to

the
right
end
surface

and
th
SSV
is

forced

toward
the
left

Contrarily
the

Spri
l
force

line

pressure
3

and

throttle

press
re
19
force
the

SSV

toward
the

right

When
vehicle

speed
exceeds
a
cee

tain

level
the

governor

pressure
sur

passes
the
sum
of
the

spring
force
line

pressure
and
throttle

pressure
and
the

valve
is
forced
toward

the
left
The

line

pressure
3
is

then
closed
Con

sequently
the
forces

being
rapjdly

unbalanced
the
force

depressing
the

SSV
toward
the

right
decreases
and

thus
the
SSV
is

depressed
to

the
l

ft

end
for
a
moment

With
Ihe

SSV

depressed
toward
the

left
end
lhe

line

pressure
3

is
connected
with

the
line

pressure
10

the
band
servo
is
re

leased
the
front

clutch
is

engaged
and

AT
8
speed
is
shifted
to

3rd

When
the

accelerator

pedJI
is

de

prcssed
both
the

line

pressure
3
and

the

throttle

pressure
19

are

high
allll

the

SSV
is
thus

retained
in
nd

unless
the

governor

pressure
15

ex

ceeds
the

line

pressure
3
and

the

throttle

pressure
19

In
the

3rd

position
force

de

pressing
ihe
SSV

toward
the

right
is

retained

only

by
the

throttle

pressure

16
and

the
throttle

pressure
16

is

slightly
Idwer

than
that
toward
the

right
which
is

applied
while

shifting

from
2nd
to

3rd

Consequently
the

SSV
is
returned

to
the

2nd

position
at
a

slightly

lower

speed

Shifting
from
3rd
to

2nd

occurs
at
a

speed
slightly
lower

than
that

for
2nd
to
3rd

shifting

When
kicked
down
at
3rd

line

pressure
13
is

led
from
the
SDV
and

the

SSV
is
forced

toward
the

right

Although
the

governor
pres
ure
is

con

siderably
high
the
valve
is
forced

completely
loward
the

right
and
tht

SSV
is

thus
returned
to
2nd

posi

tion

fhis

operation
is
called
K
cli

down
shift

When

the
shift
iever
is

shifted
to

2

or
I

range
at
the
3rd

speed

the
line

pressure
3
if
diained

at
the

MNV

Consequently
the

front
clutch

and
band
servo

releasing
oils

are

drained
As
a
result

the
transmission
is

shifted
to
2nd
or
low

speed
ai

though
the

SSV
is
in

the
3rd

posi

tion

When
the

specd
IS

shifted
io

the

3r
1
a
one

way
orifice
24

on
the

topof
the
SSV
relieves
oil

transmitting

velocity
from
the
line

pressure
3
to

the
line

pressure
10
and
reduces

the

shock

generated
fioni

the

shifting

Contrarily
when
the
lever
is
shifted

to
2
or
I

range
and
the

speed
is

shifted
from
3rd
to
the
2nd
the

orifice

checking
valve

spring
24
is

depressed
the
throttle

becomes
in

effective

the
line

pressure

10
is

drained

quickly
and

delay
in

shifting

speeds
is

thus
eliminated

The
throttle
of
line

pressure
6

transmits
Hie

oil

transmitting

velocity

from
line

pressure
6
to
line

pressurc

10
wtien
the

lever
is
shifted
to
the

R

range
and
transmits
drain
veloci

ty
from
line

pressure
10
to
line

R
range
Reverse

Torq
Con

Oil
Cool
r

A
r

Lubt

lcetlon

0

II
iL
Vel

o

Front

or
ln

l

n

jL
r

x

Q

A
uletor

Val

NIJte
kld
Automatic
Transmission

@
2nd
3n
l

Timl
lil

1i
II

r

U

nu

r
l3
ni

II

15
15
Front

Cll
ltc
Il
Low

a
Aev

Br
k

B
k

II
I

LJ

2f
ID
p
Mc
e
lf
v

If
I
I

CID
VEL
1

Thrc

r

V
I

I

11
1

IU

T
R

Clutch

f

r

Ir
l
II

Orlflc

Check

Velve

22

n
@lnd
3rdShlft

v

D
h
III

r
r
I

I

111

L

Ll
p
O
nOl
f
t

p
r

Goy
norpreat
l

Torque
Ilrfl

r

Throttl

D
ln

v

5

1

O
eln

rmrp

Throttl
p
a
nor
v
11

J

I

t

Q
V

1ve

Fig
A
T
28
Oil

preBBure
circuit

diagram
R

range
Reverie

AT
17

Automatic
Transmission

P

range
Park

Front

Cluteh
1
1

Brllk

ar

Bond

Torqu
Con

u

o

ID
VK

Th
o

I

V
II
IftY

all
Coo

II

I

Front

Lubrk
It
n

Orltlc

Check

V
A

L
b
k

tlon

1

e

O
ln

I

ThrOttle

D
ln

V

21

j
r

tUI
lor
V
h

@

V
hI

N01
M
rked
X
r
D
ln
5

I

I

I
X

Line
pr

Go
nor
t
d
pr

L
J

Q
RO
p

c
J

Torq
co
p
f

Th
ottl

p
Iecond
y

Ocw
no
V

Gover
V

Fig
A
T
25
Oil

pressure
circuit

diagram
P

range
Park

AT

IS

R

range
Reverse
Automatic
Transmission

TOl
QuaConverter

o

IIi
0

ou

14

Q

FI
Lu

IUt
O

Front

Lub
lc

O
lnV
ly

R
MO
V
l
Front

Clutdt
LowaoA

B
k

e
k

B

Clutch

ID
VK

n

V
lv
@
ftV
1

I

j

Throttle

O
in

V
Otlflce

Check

V
III

@lnd
3rdShih

V

zz

@
2nd
rd
TIm

If

V
Iy

Second
Lock
V

3
I

Zl

Not

M
k
d
X
er
0
1

LI
p
O
nOf
f

P

G
preau

I
J

Torqu
0
0
pr

Throttl

p
1
s
co

O
V
0

O
V

Fig
A
T
28

AT
17
Oil

pressure
circuit

diagram
n
II

range
Reverse

Automatic
Transmission

N

ranee
Neutral

I
a

a

8

nd

011
Coolei
VK

Th

o

Vtlv
J
@

Vtlv

I

I
D
ln

Ol
v
Lubrlc
tlon

11

I

OIIt

Lubrlut

O
lfIC

Check

Vtlv

D
lnV

I

T
uott

O
in

v

8Jl

12

ht
2nd
Shift
y
tve

5

CD

Rl9UlttO
Vtlv

Nott
M
rked
X
r
D
in

liia

1
or

IOo
nOf
fNd
IH

oov
no

p

c
z
Torqu
con
er

pr

Throttl
p
s
cond

y

a

Ol
V
o
V
tve

Fig
AT
29

AT
19
Oil

pressure
circuit
diagram
N

range
Neutral

Automatic

Transmission

0

range
Top
gear

Low
A

lI
eke

B
e

I

mf
D

J

J

V
va
I

011
COO
VK

Thro

V

o

Ot
al

oi

v

L
R
Lubfkatlon

y

Front

Lubric

1
n

Oriliu

Check

1

1
O
nV

Th
onla

O

eln

Vah
2
P
M
lflM
V

I

5

22

x

i2J

3
1n
2nd

Shift
v

1Ye

5

Manue

Val

PRND2
j
Pr

R
I
Of
1

1

5

Nota
Marked
r

Dr
ln

rs

ond

y
l

y

G
nor

Val
Goy
rnor
Val
1

1

IOo
no

feold
P

Oo
no

p

Torq
c

on
n

p

Th
onl
pr

Fig
A
T
38
Oil

pressure
circuit

diagram
uD

J
range

Top
gear

AT

25

Automatic
Transmission

I

M
nual

f4fL
J

0
I
1
r

PR
0

range
kickdown
Shift
valves
In
2nd
gear
position

To

queeO
t
Front

Clutch
Low
a

A

8

8
e
e

a

o

14

0

Oil

COO

R
L
ubrication

n

0

Drain
1
4

j

v

I

Front

Lub
icet

p
n
o

I

Thron

p
ain

V

I

j

R
gu
ato
V

I

Not
Ma
ked
X
r
p
n

Li
pr
IGo
no
f
d

p
l

Governor
p

c
Torque
CO
I
1

p

ThrOWepr
VK

Th
o

V
lv
7
1

iftV
8
Throttle

BKk
up

V
hl
ID
So
e

COw

P
Ifk

Check

V

I

1
24
5
Mod
Yo

I

@2nCl
3rdSl
lilr

V

12

3
ht
2nd
Shih
V

5

L

I
X

S
COnd

Primary

G
rw
Va
Gov
nor
Valve

AT
27
Fig
AT
39
Oil

pressure
circuit

diagram
D

ronge
kickdown
shift
values
in
2nd

gear
position

Automatic
Transmission

2

range
2nd

gear

Torqu
Con
Fron

Clutch
l

ow
A

B
ke

Br

I

12

011

Cool
i

IL
12

ID
v

Th

ot

Valve
7
T
onl

Beck

up

V
ID
So

0
Id

1ft
v

Front

Lubric
t
Orltic

Check

Va

Or
lnVal
e

Throttle

Dr
in

V
l
P
Modif
Va

15

BJl

@
2nct
3rd
Tim

If

Ve

12

3
1
2nd
Stolt

21

Se
onc
l
Lock
Va

3
I

PR
02

1
s
I
Jl
J
I
r

A
ul
Gr
v

2
w

Valve

Note
Merltedl
D
a
n

I

G
v
Line
p
IOo
nOf
f
d
pr

G
no

p
r

c
o
Torque
con
pr

Thron

p
re
ond

a
nor
v

Fig
A
T
42
Oil

pressure
circuit

diagram
2

range
2nd

gear

AT
29

Starter

should
be

brought
into

op

eration

only
when
selector

lever
is
in

P

and
N

positions
it

should
not

be
started

when
lever
is
in
D
2

I

and
R

positions

Back

up
lamp
should
also

light

when

selector
lever
is

placed
in

R

position

S
After

converter
is
installed

rotate

10

Check
level
of
oil
in
transmis

crankshaft
several
turns
and
check

to

be
sure
that
transmission

rotates

freely
sion

For
detailed

procedure
see

page

AT48

without

binding

6
Pour

recommended
automatic
II

Move
selector
lever

through
aU

positions
to
be

sure
that
transmission

transmission

fluid

up
to
correct
level

operates
correctly

through
oil

charge
pipe

verter
to
transmission
measure

dis

With
hand

brake

applied
rotate

tan
A

to
be
certain

that

they
are
7

Connect
manual
lever
to
shift

engine
at

idling
Without

disturbing

correctly
mbi
d

S
F
rod

Opeiationsliould
oecaTrie
f
bue

the
above

sclUng
ffiovTSelector
lever

AT

50
with

manual
and
selector
levers
in

through
N

to
D
to
2

to
I

Distance
A
N

and
to
R
A

slight
shock
should
be

More
than
21

5
mm
0
846
in
8
Connect

inhibitor
switch
wires

felt

by
hand

gripping
selector

each

time
transmission
is
shifted
Automatic
Transmission

4
Bolt
converter
to
drive

plate

Note

Align
chalk
marks

painted
a

cross
both

parts
during
disas

sembling

processes

AT116

Fig
AT
49

Torque
converter

aligning
cu
t

3
When

connecting

torque
can

A

ATl17
Notes

a
Refer
to

covering
topic

under

Checking
and

adjusting

inhibitor
switch
n

on

page

AT
49

b

Inspect
and

adjust
switch
as

above
whenever
it
has
to

be

removed
for
service

Fig
AT
50

Installing

torque
converter
9
Check
inhibitor
switch
for

op

eration

AT
34
Note

See

page
AT

49
for

checking

engine
idling

12

Check

to
be

sure
that
line

pres

sure
is

correct
To
do
this

refer
to

relative

topic
under

Testing
line

pres

sure
on

page
AT

52

13

Perform

stall

test
as

per
the

instructions

on

page
AT

50

Automatic
Transmission

TRANSMISSION
CONTROL
LINKAGE

4

120N

L
B

j

p

r

4

1
Control
lever
knob

2
Pusher

3
Control
lever

assembly

4
Selector
range
lever

5
Control
lever
bracket

6
Selector
rod

REMOVAL
AND

INSTALLATION

1
Disconnect
control
knob
from

control
lever

by
removing
two
2

screws

2
Remove
console
box

3
Remove

selector
rod
selector

range
lever
and
control
lever

assembly

with
bracket

To
install
reverse
the
order
of

removal

ADJUSTMENT

The

adjustment
of

linkage
is
as
Tightening
torque
1
of

nuts
and

screw

kg
m
ft
lb
G

A

T273

@
T
0
07

to
0
13

0
5
to

0
9

@
T
1
6
to
2
2

12
to

16

T

3
to
4
22

to
29

@
T

0
35

to
0
45
2
5
to
3

3

C8i
T

0
8
to

1
1
6
to
8

important
as

Inspection
of
oil
level

for
the
automatic
transmission

Therefore

great
care
should
be

exercised
because

faulty
adjustment

will
result
in
the
breakdown
of
the

transmission

1

Prior
to

installing
control
knob

set
the
dimension
A
to
II
to
12
mm

0
43

to
0
47
in

2
Install
control
knob
on
lever
At

the
same
time
check
the
dimension

B
and

adjust
it
to
0
1
to
1
1

mm

0
004
to
0
043
in

by
turning
pusher

@
See

Figure
AT
51

AT

35
Fig
AT
51

Controlli
f
kage
sy
tem

3
Loosen

adjust
nuts

@
Set

control
lever

@
and
selector
lever

@

at
N

position
moreover

J
set
the

clearance
C

to
I
mm
0
039
in

by

turning
in
or
out

adjusting
nuts
at

trunnion
with
connects
selector
rod

@

After

adjusting
make
sure
that

control
lever
can
be
set
in

any
position

correctly
and
that
selector
lever

oper

ates

properly
without

any
binding

If

levers
do
not

operate
satisfactori

ly

readjust
or

replace
parts
as
neces

sary