oil DATSUN PICK-UP 1977 Service Manual

P

range
Park
Automatic
Transmission

L
A

r
k

8r
k

I

f

I
CID
VK

TIlro

V
lv

I
I

2
ID
Mocl

1
5
FrOl
ll

Clutch
Au

rr
tth

1
1
1

r

I

r

D

II

R
tOl
V

II

L

I
Torqu
Con
ter

0

I
ump

4

011
Coo

AM
Lubr
tlo

D
i

t
V

l

Front

o
v

n
Llrll

rt

Not
rk
t
to

Sol
n

BI

Cow
1ft
v
t

1

j
I

1111

II
I

I

il
1111
III

r
Orlflc

K

v

Throttl

Dr
ln

v

II

11
5

@
2nd
3
d

Timing

I

V
l
w
J

I
JQ

l
r
R

II

I

IKOnd
Lock

V
l

I

3J

I

t
rJ
I

q

I
rr

u

J2
3

n

l
l
J

r
A
J1

J
I

I
V
nu
l

V
l

P
21

Or
ln

LlMl

pr
r

100
10r
1

I

rlmarv

OoverrwJf
VIIfve
BIeOM
IV

OOll
nor
Y
M

Oo
or
It

Torqu
conv
ner

Throttl

Fig
A
T
25
Oil

pressu
circuit

diagram
P

range
Parh

AT
15

R
RANGE
REVERSE

In
R

range
the

front
clutch
and

the
low
and
reverse
brake
are

applied

The

power
flow
is

through
the

input

shaft
front
clutch
and

connecting

shell
to
the

sun

gear
Clockwise
rota

tion
of
the
sun

gear
causes
counter

clockwise
rotation
of
the

rear

planeta

ry
gears
With
the

connecting
drum

held

stationary
by
the
low
and

reverse

brake
the
rear

planetary
gears
rotate

the
rear
internal

gear
and
drive
the

flange
counterclockwise
The

rear

drive

flange
splined
to
the

output
shaft

rotates
the

output
shaft
counterclock

wise
at
a

reduced

speed
with
an

increase
in

torque
for
reverse

gear
Automatic
Transmission

R

Fig
AT

26
Power

tranamis
ion

during
R

range

m
i

1

A
TOBS

Fig
A
T
21

Optrationof
each
mechanism

during
R

range

When
the
manual
valve

V
is

posi

Clutch
Low

Band
servo
One

tioned
at

R

range
the
oil

having
the
Gear

Partina

Ranae
re
ne

way

line

pressure
7
is

directed
to
line
ralio

Front
Rear

brake
Openlion
Relulie

clutch
plwl

pressure
circuits
5

and
6
The

pressure
in
the
circuit
5
actuates
the
Park
on
on

low
and
reverse

brake
after

being
Ruene
2
182
on
on
on

introduced

into
line

pressure
circuit

Neutral

12

through
the
I

st
2nd
shift
valve

ID
The

pressure
in

the
circuit

op
DI
Low
2
458
on
on

erates
the
release
side
of
the
band

servo
and
the
front
c1u
tch
after

being
Driowe
D2
Second
1
458
on
on

led
to
line

pressure
circuit
0
D3

Top
1
000
on
on
on

through
the
2nd
3rd
shift
valve

@

2
Second
1
458

The
throttle

pressure
I
6
and
the
line
on
on

pressure
6
which

vary
with
the

12
Second
S8
on
on

degree
of
accelerator

pedal
depression

II
Low
2
458

both
act
the

pressure
regulator
on

on

on

valve

CD
and

press

against
its
valve

CD

increasing
line

pressure
7
In
Rn

range
the

governor

pressure
is
absent

making
all

such
valves
as
the
1st
2nd

shift
valve

ID
lnd
3rd
shift

valvc

@
and

pressurc
modifier
valve

inoperative

AT16

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

N
RANGE

NEUTRAL

In

N

range
none
of

the
clutches

and
band
are

applied
thus
no

power
is

transmitted
to

the

output
shaft

The

pressure
of
oil

discharged
from

the
oil

pump
is

regulated
by
the

pressure
regulator
valve

Dto
maintain

the
line

pressure
7

and
the
oil
is

led

to
the
manual
valve

@
vacuum
throt

tie
valve

@
and
solenoid
down
shift

valve

@
The
oil
is
further
introduced

into

the

torque
converter
at
its

op

erating

pressure
14
and
a

portion
of

this
oil

is
distributed
to
each

part
as

the
front
lubricant
The
oil
which
has

been

discharged
from
the

torque
con

verter
is

also
distributed
to
eacn

part

as
the

rear
lubricant

As
the
oil

pump
rotates
at
the
same

speed
as
the

engine
the
oil

pump

discharge
increases
with

engine

speed

But
the

surplus
oil
is
returned
to
the

oil

pan
by
the

pressure
regula
tor
valve

D
Automatic
Transmission

Geu
Clutch
Low
4

Band
crvo
One

Pultin

R

atio
WI

pawl

Front
Rear

brake
Operation
Release

clutch

Park
on
on

Reverse
2
182
on
on
on

Neutral

Dt
Low
2
458
on

on

Drive
D2
Second
1
458
on
on

m

Top
1
000
on
on

on
on

2
Second
1
458
on

on

12
Sec
ond
1
458
on
on

II
Low
2
458
on
on

AT
la

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

Automatic
Transmission

R
RANGE
REVERSE

R

In
R

range
the

front
dutch
and

the
low
and

reverse
brake
are

applied

The

power
flow
is

through
the

input

shaft
front
clutch
and

connecting

shell
to

the
sun

gear
Clockwise
rota

tion

of
the

sun

gear
causes
counter

clockwise
rotation
of
the
rear

planeta

ry

gears
With
the

connecting
drum

held

Slationary
by
the
low
and
reverse

brake
the
rear

planetary
gears
rotate

the
rear
internal

gear
and
drive
the

flange
counterclockwise
The
rear

drive

flange
splined
to
the

output
shaft

rotates
the

output
shaft
counterclock

wise
at

a
reduced

speed
with
an

increase
in

torque
for
reverse

gear

f

When
Ihe
manual
valve

CV
is

posi

tioned
at
R

range
Ihe
oil

having
Ihe

line

pressure
7
is

directed
to

line

pressure
circuits
5
and

6
The

pressure
in

the
circuit
5
actuates
the

low
and
reverse
brake
after

being

introduced
into
line

pressure
circuit

12

through
the
I
st

2nd
shift
valve

@
The

pressure
in
Ihe

circuit

op

erates
the
release
side
of
the
band

servo
and

the
front
clutch
after

being

led
to

line

pressure
circuit

10

through
the
2nd
3rd
shift
valve

@

The
throtlle

pressure
16
and
the
line

pressure
6

which

vary
with
the

degree
of
acceJerator

pedal
depression

both
act

on
the

prcssure
regulator

valve

CD
and

press

against
its
valve

CD

increasing
line

pressure
7
In
R

range
the

governor

pressure
is
absent

making
all
slldl

valves
as
the
J
SI

2nd

shift
valve

@
2nd
3rd
shift
valvc

@
and

pressure
modifier
valve

j

inoperative
C

Fig
AT

26
Power

transmi
ion

during
R

range

A
TOS5

Fig
AT
27

Operation
attach
mechanism

during
R

range

G
Clutch
Low
A

Band
servo
One

Parkin

Ran
no
wa

plwl
ratio

Front
Rear

brake

Operllioo
Rdr
ue

clutch

k
on
on

Revctte
1
181
on
on
on

Neutnl

DI
Low
1
418
on
on

Driw
D2
Second
1
458
on
on

DJ

Top
1
000
on
on
on
on

2
Second
1
458
on
on

12
Second
1
458
on
on

I

II
Low
2
458
on
on

AT
16

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

N
RANGE
NEUTRAL
Automatic
Transmission

In
N

range
none
of
the
clutches

and
band
are

applied
thus

no

power
is

transmitted
to
the

output
shaft

The

pressure
of

oil

discharged
from

the
oil

pump
is

regulated
by
the

pressure
regulator
valve

CD
to
maintain

the
line

pressure
7
and
the
oil
is
led

to
the
manual
valve

V
vacuum
throt

tle
valve

@
and
solenoid
down
shift

valve

@
The
oil
is

further
introduced

into
the

torque
converter
at
its

op

erating
pressure
14
and
a

portion
of

this
oil
is
distributed

to
each

part
as

the
front
lubricant
The
oil
which
has

been

discharged
from

the

torque
con

verter
is
also
distributed

to
eacn

part

as
the
rear
lubricant

As

the
oil

pump
rotates
at
the
same

speed
as
the

engine
the
oil

pump

discharge
increases
with

engine
speed

But
the

surplus
oil

is
returned
to
the

oil

pan
by
the

pressure
regulator
valve

CD
G
Clutch
Low

Band
servo
One

Pukiq

R
w

pawl
ntlo

Front
Rur

br
ke
Optruion
Release

clutch

PIlIi
on
on

Reverse
2
182
on
on
on

Neut
1

01
Low
2
458
on
on

Drive
02
Second
t
458
on
on

03

Top
1
000
on
on
on
on

2
Setond
1
458
on
on

12
Second
1
4
58
on
on

1

II
Low
2
458
on
on

AT

18

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
Low

gear

Torque
Conven
Front

Clul
L
A

e

B

6
Clutch

I

Q

011

Cool
TIC
011

p

V

RUf

LubtJuflon

n

Ii
IO
lln

V
l

F

ont

Lub
lclt
n

D
nV

l

ThroW

0
1

V

I

Q
P
P

tOO
V

Note
U
X
Ir

or
n

Llnep
IO
nor
feed

GoY
no
p

Torque
co

p

Th
on
I

ID
v

Th
O

V

Orifice

V

L

13

t

12

tt
2NtSt
llttY

5

i

Iecotodary
Y

QoY
nOl
V
Oew
roo
v

Fig
A
T
32
Oil

pressure
circuit

diagram
uD

1
range
Low

gear

AT
21