1977 DATSUN PICK-UP lock

b

r
r

AC734

Fig
A
C

15
Service
value

docK
wise

n

r
Air

Conditioning

HANDLING
CAN
TAP

A

wide

variety
of
can

taps
are

available
The

following
procedures

apply
to

conventional

can

taps

For
the

correct

usage
refer
to

the

manufacturer
s

instructions

Caution
Use

can

tap
of

good
quality

I
Connect

charging
hose
to
the

center
fitting
of
manifold

gauge
At

this
time
confirm
that
both
stems
are

fully
turned
in

front
seated

2
Turn

can

tap
handle

fully
coun

Counterclockwise

s

r

@

A

rn

Purging
air

n

R
I2

AC
terclockwise

so
that
the

needle
is

pulled

up

3
Attach

can

tap
to

refrigerant
can

firmly

4

Turn

can

tap
handle

fully
clock

wise
to

make
a

hole
in

refrigerant

can

5

Turn
the
handle

fully
counter

clockwise
to
raise
the

needle

Refriger

ant

gas
will

flow

up
to
the
center

fitting
of

manifold

gauge

6
Loosen
the

connection
a
t

the

center

fitting
of
manifold

gauge
for
a

few
seconds
to

purge
air

inside

charg

ing
hose
See

Figure
AC
16

1
Can
tap
handle

2

Charging
hose

3
Needle

4

Refrigeran
t
can

AC246

AC247

Fig
AC
16
Can

tap
and

pw
ging
air

q

Air

Conditioning

BLOWER
MOTOR
DIAGNOSES

Blower
motor

inoperative

Check
fuse

In
fuse
block

15A
W

Single
fuse
15A
at

cooling
unit

I

j

If
OK

Check
the

continuity
and

fitting
of
fan
switch

I

I

If
OK

I

I

Connect
fan
switch
to

wiring
harness

2

Turn
the

ignition
switch
ON
IG

3
Set
fan
switch
at
ON
1
2
or
3

position

Check
the

voltage
for
blower
motor

Blue
lead
wire
is

poweI
source

Blue
wire

with
white

stripe
is

for

grounding

I

I
Voltage

I

I

Check
the

continuity
and

fitting
of
resistance
on

cooling
unit

I

I
If
OK
If

damaged

I
I

Replace
blower
motor
Replace
resistance

AC

24
mown
fuse

Replace
fuse

j

If

damaged

I

I

Replace
fan
switch

No

voltage

Replace
main
relay

Air

Conditioning

REMOVAL
AND
INSTALLATION

COMPRESSOR

REMOVAL

INSTALLATION

IDLER
PULLEY

FAN
BELT

TENSION
ADJUSTMENT

REMOVAL
AND
INSTALLATION

INSPECTION

COOLING
UNIT

REMOVAL
AND
INSTALLATION

DISASSEMBLY
AND
ASSEMBLY

INSPECTION

RECEIVER
DRYER
AND
PIPING

COMPRESSOR

REMOVAL

I
Remove

battery

2

Disconnect

compressor
lead
wire

at
connector

3
Loosen
idler

pulley
lock

nut
then

adjusting
bolt
Remove

compressor

drive
belt

from

compressor
pulley

AC477

Fig
AC
28

Removing
drive
belt

4

Discharge
system
Refer
to
Dis

charging
System
under
General
Service

section
CONTENTS

AC
25

AC25

AC26

AC
27

AC
27

AC27

AC
27

AC27

AC
27

AC
2B

AC
29

AC
29
REMOVAL

AND
INSTALLATION

INSPECTION

WIRING

HARNESS
AND

COMPONENTS

WIRING
DIAGRAM

MAINTENANCE

MAIN
RELAY

COMPRESSOR

RELAY

FAN
SWITCH

RESISTOR
FOR
FAN
SWITCH

THERMO
SWITCH

F
I

C
D
SOLENOID
VALVE
AC29

AC29

AC30

AC30

AC31

AC31

AC31

AC31

AC32

AC32

AC
32

5
Remove
flexible
hose

fixing
plate

and
disconnect
low
and

high
pressure

flexible
hoses
from

compressor

Notes

a
Use
two

wrenches
when
disconnect

ing
pipe

joints

b

Plug
flexible
hose
and

compressor

joint
openings
immediately
after

disconnection
to

prevent
entry
of

dust
moisture
laden
air
etc

Fig
AC
29

Disconnecting
ftexible

hoses

from
compressor

6
Remove

bolts

securing
fuel
tube

to

compressor
attachment

AC
25
Y
1

L

AC744

7
Remove
four
bolts

securing
com

pressor
to
its
bracket

Compressor
and

attachment

can
now
be
detached
as
an

assembly

Notes

a
There
are
a

total
of
four
bolts
two

on

upper
side
of
bracket
and
two

on
lower
side
of

compreSsor

Loosen

upper
bolts
and
remove

lower
bolts
When

removing
upper

bolts

securely
hold

compressor

with
one
hand

b
When

installing
temporarily
tighten

upper
bolts
then

tighten
lower

bolts

IDLER

PULLEY

FAN
BELT
TENSION

ADJUSTMENT

The

standard

compressor
drive

belt

tension
is
between

8
and
12

mm

AC480

Note
Be

sure
to

loosen

locking
nut

before

turning

adjusting
bolt
Re

tighten
it

after

adjustment

REMOVAL
AND

INSTALLATION

Remove
drive

belt

To
do
this
loosen

locking
nut

before

loosening

adjusting
bolt
Drive

belt
will
then
be
detached

2

Remove
idler

pulley
from
bracket

by
r

J1e

vM
or
king
nut

jiwT
9ff
t

llil
reverse
the

order
of

rerr
oval
jldJ
1
t

Jldr

J
I

INSPECTiON

Oheck
idler

pulley
for

smooth
rota

tion

G
0

llfHt
H
Y

d
H

u
t
1
W

n
l

ot
Jrk
H
l

Check
i

ler

pulley
bracket
for

cracks

Replace
arts
iffound

damaged

c

f
lOJ

gD
IlI
J
l

gtt
flvlnv

nOj
IH

q
g

cll
dE
m
J

COOLING
UNIT

REMOVAL
AND
oM1

INSTALl
A

1lIONI
gnillslUli
n

dW
C

19qm91
crft

llU2
3

6rn
f01
Gl0ql

pj

nDiScoimecprlY
i

ferY
lgroUR
hable

2

Disbhargiou
y
tem

iRefrflsll
Qis

chargingrSystemiillidenGeneral
S

ervicel

sectiom5qiq
10
2
9
fl
1U
n
1Ii
2

oj
liD
Air

Conditioning

0
32
and
0
47
in

when

depressed

with
thumb

pressure
midway
between

the
crankshaft

and

compressor
pulleys

If

necessary
turn

adjusting
bolt

to

move
idler

pulley
up
or
down

until

belt

tension
is

correct

Idler

pulley

Crankshaft

pulley

AC456

Fig
AC
32

Adjustment
of
bolt
tension

3

Connect
low

and

high
pressure

pipes
to
their

proper
positions
in

engine
compartment

Notes

3
Be
sure

to
use
two

wrenches
when

connecting

pipe
joints

b

Plug
pipe

opening

immediately

after

pipe
disconnection

c
Be

careful
not
to

break

expansion

valve
This
valve
is

wrapped
with

heat

insulating
tape

0

J
JWu

J
1
2
ld

m

bm
Ufl

J51
8

I

1

lEldgJ
v
Jwm
j

y
d
n
l2u

1
C765

X

fIlO
1i

qJ
j

gnjlcfu2fIJ
lc
rf

1551

1UJ

flip
1h
tqnPfffi2n
Wfi

i
V1c
ip

j

at
3duJ

lsIliqr
J

wlr
v
n

irWfiqX
ani

qiq

4q
v
Remo
e

tworgromll
ets
from

dash

panel
lots
n

5
lRemove

glovelbox
lBl
n1

oT
0

6

Detach

cooling
unit

cover

Icyom
n

AC

ZA
AC766

Fig
AC
34

Removing
cooling
unit

cover

7

Remove
three
ducts

from

cooling

unit

i

j

l

I

11

AC767

Fig
A
C
35

Removing
cooler
ducts

8
Remove
thermo

switch
control

cable
from

conne
ctor

9
Remove

cooling
unit

and
bracket

as
an

assembly

J

t

AC768

F

lIJAh
Cr
P

3
6
R
1

7
fi
vorr

l
l51
r

Ig

emo
vmg
coo

mg
um

r

n
I1iBITJ
0HJ
Jl
t

rbtivl2

Ofm
IIfj

wom
51
f

H

f
L

ol

IJgjjJpn
1I
SH
tc

vehicle
bn

y
with
five
rews

q

2tl
G

i
O

r
Jv
a8f1l1

J
a

I
ld
1

51
b
nc

IOJni

QisconnecEf
twonleadliwif
eUcon
1

nectars
from

cooling
unitqiq
s
iuo
UHf

Service

Equipment

Applied
Ser
77
620NA

Newly

No
Tool
Number
Tool

Name
vehicle
Class
Remarks

added

or

unit
KVOO
102000

ST31970000
Collar
All
X
2

610

ST30611000
Drive

pinion
outer
race
drift
bar
All
X
2

610

ST30613000
Drive
pinion
outer
race
drift

adapter
All
X
2

610

ST3062
1000
Drive

pinion
outer
race
drift

adapter
All
X
2

610

KV311
00300
Solid

punch
All
X
2

610
710
S30

ST3127S000
Preload

gauge
All
X
2
B21O
610
710
S30

KV381025S0
Oil
seal

fitting
tool
All
X
2
610

4

Front
axle

ST35380000
Kingpin
bushing
drift
All
X
2

HT56802000

Kingpin
bushing
reamer
All
X
2

ST36070000
Transverse
link

bushing
replacer
All
X
2

ST35390000
Kingpin

grease
seal
drift
All
X
2

5

Rear
axle

ST38020000

Bearing
lock
nut
wrench
All
X
2

KV40101000
Rear

axle
stand
All
X
2
B210

610
710
S30

ST36230000

Sliding
hammer
All
X
5

B210
610
710
S30

HT72480000
Rear

axle
shaft

bearing
puller
All
X
2

B210
610
710
S30

6

Steering

ST2902000
I
Pitman

arm

puller
All
X
2

B210
610
710
S30

ST27
180001

Steering
wheel

puller
All
X
2
FIO
B210
610
710

S30

HT72520000
Ball

joint
remover
All

X
2
FIO
B210
610
710

S30

ST3127S000
Preload

gauge
All
X
FlO
B210
610
710

S30

7

Brake

GG943
10000
Brake

pipe
torque
wrench
All
X
2

B210
610
710
S30

ST08060000
Master
Vac
oil
seal
retainer
drift
All
X
3

B210
610
710
S30

ST08080000
Master
Vac
wrench
All
X
3
B210
610
710
S30

SE
5