1977 DATSUN PICK-UP charging

Air
Conditioning

b

When

charging
hquefied
refrigerant

into
the

system
lith
the
can
turned

upside
down
to
reduce

charging

time

charge
it

only
through
high

pressure
valve
but
not

through
low

pressure
3
h
e

After

completion
of

charging
the

compressor
should

always
be

turn

ed
Several
times

manually
See

Figure
AC
22

t

UL
Q

v1ifl
j

AC739

Fig
A
C
22

ClUJrging
refrigerant
First

step

4
If

refrigerant
charging

speed
slows

down

charge
it
while

Iunning
the

compressor
for
ease
of

charging
After

having
taken
the

steps
up
to

3
above

proceed
with

charging
in

the

following

order

I
Shut
off

high

pressure
valve
of

manifold

gauge
back
into

refrigerant
can
and
can

may
explode

2

Run
the

engine
at

idling
speeds

about
1
500

rpm

3
Set
the

temperature
control

lever
and
fan
switch

at
maximum

cool

and
maximum

speed
respectively

4

Charge
refrigerant
while
con

trolling
low

pressure
gauge
reading
at

2
8

kgfcm2
40

psi
or
less

by
turning

in
or

out
low

pressure
valve
of
mani

fold

gauge
See

Figure
AC
23
Caution
Never

charge
refrigerant

through
high

pressure
side
of

sys

tem
since
this
will
force

refrigerant

t

AC740

Fig
A
C
23

Charging

refrigerant
Second

step

AC
14
5
When

refrigerant
can
is

empty

fully
close

both
Ives
of
manifold

gauge
and

replace
refrigerant
can
with

a

new
one

Before

opening
manifold

gauge

valve
to

charge
refrigerant
from
new

can

be
sure
to

purge
air
from
inside

charging
hose

6

Charge
the

specified
amount

of

refrigerant
into

system
by
weighing

charged
refrigerant
with
scale

Over

charging
will

cause

discharge

pressure

to

rise

AC255

Measure
the

amount
of

charged

refrigerant
with
a
scale

Make
a

note
of
the

amount

charged

from

can

Fig
AC

24
Measuring
refrigerant

Refrigerant
capacity

Unit

kg
lb

Refrigerant
Minimum

Maximum

R
12

0

7
1
5
0
9
2

0

Note
The

presence
of
bubbles
in

sight
glass
of

receiver

dryer
is
an

unsuitable
method
of

checking
the

amount

of

refrigerant
charged
in

system
The
state
of
the
bubbles
in

sight
glass
should

only
be
used
for

checking
whether
the
amount
of

charged
refrigerant
is
small
or
not

The
amount
of

charged
refrigerant

can
be

correctly

judged
by
means

of

discharge
pressure
Refer
to
Re

frigerant
Level
Check

7
After
the

specified
amount
of

refrigerant
has

been

charged
into

sys

tem
close
manifold

gauge
valves
Then

detach

charging
hoses
from
service

valves
of

system
Be
sure
to
install

valve

cap
to

service
valve

8

Confirm
that
there
are

no
leaks
in

system
by

checking
with
a
leak
detec

tor

Refer
to

Checking
for
Leaks

Note

Conducting
a
performance
test

prior
to

removing
manifold

gauge
is

a

good
sen
ice

operation
Refer
to

Performance

Test

CHECKING
FOR

LEAKS

Conduct
a

leak
test
whenever
leak

age
of
refrigerant
is

suspected
and

when

conducting
service

operations

which
are

accompanied
by
disassembly

Dr

loosening
of

connection
fittings
Air

Conditioning

Refrigerant
is
a

colorless
odorless

gas
and

leakage
from

system
is
diffi

cult
to
detect

Accordingly
the
use

of

a

leak
detector
facilitates

check
for

leaks

Two
methods
of

checking
are

available
one

employs
a
halide

leak

detector
which
burns

propane
gas
or

butane

gas
and
the
other

is
an
electric

type
leak

detector

HALIDE
LEAK
DETECTOR

Since
the

propane
leak
detector
and

butane
leak
detector

are
the

same
in

respect
to
their

operation
this

section

describes
the

operation
of
the

propane

leak
detector

The

copper
screen
is
heated

by
the

burning
of

propane
Refrigerant
gas

decomposes
to

color
the
flame
when

it

contacts
the
heated
screen
The

gas
to

be
checked
is
drawn
into

the

sampling

tube

and
sent
out
to
the
burner
A

refrigerant
leak
can

clearly
be
detected

by
variations
in
the
color
of
the
flame

Propane
type

NO
LEAK

SMALL

LEAK

LARGE
LEAK
Greenish

blue

Yellow

Purple
AC010
1

Copper
reaction

plate

2

Flame

adjusting
lines

3

Burner

4

Sampling
tube

5

Strainer

6

Gas
bomb

7
Flame

adjuster

Fig
A
C
25

Checking
for
leak

Butane

type

Pale
blue

Bright
blue

Vivid

green

AC
15
I

Discharge

refrigerant
in

one
or

two
seconds
to
ascertain

that

system

has
a

sufficient

pressure
needed
for

leak
detection

Charge
with
04

kg
I

lb
of

refrigerant
if

necessary

2

Light
leak
detector

Adjust
the

height
of

the
ilame
between

flame

adjusting
lines
at
the

top
and
bottom

of
combustion

tube
A

reaction

plate

will

immediately
become
red

hot

3

Place
the
end

of

sampling
tube

near
the

point
of
the

suspected
leak

in

system

Notes

a
Since

refrigerant
gas
is
heavier
than

air

small
leaks
can
b

easily
detect

ed

by

placing
sampling
tube
direct

ly
below
the
check

point

b
Suitable
ventilation
is

required
If

refrigerant

gas
is

mixed
with
the

surrounding
air
leak
detector
will

always
indicate
a

response
and

detection
of
the
actual
leak
will
be

difficult

c

Never
bold
leak
detector
at
an

angle

Cautions

a
Never

inhale
the
fumes

produced

by
combustion
of

refrigerant
gas

since

they
are
toxic

b
Never
use
halide
torch
in
a

place

where
combustible
or

explosive

gas

is

present

4
The

ilame
will
be
almost

colorless

when
there
is

no

refrigerant
gas
being

burned
When
there
is

a
small

refriger

ant

gas
leak
the
ilame

will
be

green
or

yellowgreen
When

refrigerant

gas
leak

age
is

large
the
ilame
will
be
brilliant

blue
or

purple
Since
the
color
of
the

ilame
will
be

yellow
when
dust
is

being
burned
Or
there
is

aging
scale
on

copper
reaction

plate
always
keep
the

strainer
of

sampling
tube
and
reaction

plate
clean

5

Major
check

points

I
Compressor

Compressor
shaft
seal

rotate
the

compressor
by
hand

Oil
filler

plug

Flexible
hose
connections

Rear
cover
and
side
cover

gaskets

Service
valve

2
Condenser

Condenser

pipe
fitting

Condenser
inlet
and
outlet

pipe

connections

I

Notes

a
The
bubbles
seen

through
the

sight

glass
are
influenced

by
the
ambient

temperature
Since
the
bubbles
are

hard
to
show

up
in

comparatively

low

temperatures
below
200C
6S0

F
it
is

possible
that

a

slightly

larger
amount
of

refrigerant
would

be
filled
if

supplied
according
to

the

sight
glass
Be

sure
to
recheck

the
amount
when
it

exceeds
200C

680F
In

higher
temperature
the

bubbles
are

easy
to

show

up

b

When
the

screen
in
the

receiver

dryer
is

clogged
the
bubbles
will

appear
even
if
the
amount
of

refrig

erant
is
normal
In
this
case
the

outlet
side

pipe
of
the
receiver

dryer
becomes

considerably
cold

PERFORMANCE
TEST

Check
for
the
amount
of

refrigerant

in
the

system
can
be

made

by
meas

uring

pressure
on

discharge
side

The

correct
amount
of

refrigerant
is

in
the

system
if

pressure
on
the

discharge
side
is
within

the

specified

range
For
details
refer
to

Perform

ance

Test
described
later

Overcharging
will
show

up
in

higher

pressure
on
discharge
side

COMPRESSOR
OIL

LEVEL

CHECK

The
oil

used
to
lubricate

compres

sor
circulates
into

system
from
the

oil

sump
while

c9mpressor
is

operating

The

efore
to

correctly
measure
com

pressor
oil
the

amount
of
oil

flowing

to

system
must
be

considered
If
a

considerable
amount
of

leakage
of

refrigerant
gas
happens
the

leakage
of

compressor
oil
is
also
considered

There

will
be

no

compressor
oil
leak

age
from
a

completely
sealed

system

When

system
operates
under

satisfying

condition
the

compressor
oil
level

check
is

unnecessary

When

checking
the
level

of
com

pressor
oil
or

when

replacing
any

component
part
of
the

system
use
the

following
service

procedure
This

fa

cilitates
to
return
oil
to

compressor

I

Operate
compressor
at

engine

idling
speed
1
000

rpm
or

below

with
controls
set

for
maximum

cooling
Air

Conditionin
j

and

high
blower

speed
for
10
to

15

minutes
in

order
to
return

compressor

oil
to

compressor

2

Stop
the

engine
and

discharge

refrigerant
of

system
and
then

remove

compressor
from

the
vehicle

3
Remove

compressor
fIller

plug

Drain

compressor
oil
from

compres

sor
oil

sump
and

measure
the

amount

4

Compressor
oil
is

satisfactory
if

the

following
amount
of
oil

remains
in

the

compressor

Residual
oil

S5
to
128

gr
3
to
4
oz

5
Check
the
cleanliness
of
the
oil
If

the
oil
contains

chips
or

other

foreign

material
clean
oil

5ump
with
new

oil

6
Discard
the

used
oil
and

fili
with

the
same
amount
of
new
oil
Add

oil
if

found
less
than
above
amount

Fig
AC
27

Filler

plug

If

compressor
is

inoperative
due
to

faulty
compressor
or

heavy
loss
of

refrigerant
remove

compressor
and

repair
as

necessary
Then

pour
oil

up

to
correct
level
and
install
on

engine

After
above

steps
have
been

complet

ed
recheck
oil
level
drain
oil
to

correct
level
if

level
is

excessively
high

PERFORMANCE
TEST

The
cooling

performance
of
the
air

conditioner

changes
considerably
with

changes
in

surrounding
conditions

Testing
must
be

performed
using
the

correct
method
This

test
is
used
to

judge
whether

system
is

operating
cor

rectly
and

can
also
be
used

as
a

guide

in

checking
for

problems

I

Park
the
vehicle
indoors
or
in
the

shade

AC
17
2

Open
all
the
windows
of
the

vehicle
fully
However

close
the

doors

3

Open
the
hood

4

Connect
manifold

gauge
to

high

and
low
side
service
valves
of
the

system
Refer
to

Handling
Manifold

Ga

uge

5

Set
fan
control
lever
to
maxi

mum

6
Set

temperature
control
lever

to

max
cool

position

7
Start
the

engine
and
hold

engine

speed
at
1
500

rpm

S
After
the
air

conditioner
has
been

operated
for
about
10
minutes

measure

system

pressures
at

high
pres

sure

discharge
side
and
low

pressure

suction
side

9
Measure
the

temperature
of
dis

charge
air
at

outlet

grille

10
Measure
the

temperature
of

capin

11
Measure
ambient

temperature

and

humidity
one
meter
3
3
ft

away

from
condenser
front
Be

careful
not

to

expose
dry
buib

and
wet
bulb

to

direct

sunlight

12
Check
for

any
abnormalities

by

comparing
the
test

results
with
stand

ard

pressure
in
Performance

Chart

Notes

a
The

pressure
will

change
in
the

followi

g
manner
with

changes
in

conditions

When

blower

speed
is

low
dis

charge

pressure
will

drop

When
the
relative

humidity
of
in

take
air
is
low

discharge
pressure

will

drop

b

The

temperature
will

change
in
the

following
manner
with

changes
in

conditions

When
the
ambient
air

temperature

is

low
the
outlet
air

temperature

will
become
low

If
the
test
reveals
that
there
is

any

abnormality
in

system
pressure
isolate

the

cause
and

repair
by
reference
to

the
Trouble

Diagnoses
and
Cor

rections

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

2

R

C7

c

L

PJJ

I

8

INSTALLATION

a
c
J

l
i
rp

To
install

compressor
reverse
the

order
of
removal
Observe
the

follow

ing
nhlJo
e
trorf
1001

vom
R

i
n3

Wheliqli
liiAniitg

fiil
l
in

pt
l

witlil
tiiel
sam
efuouiitITof

b11
1fasitlult

used

previously
v
d
rnl

2

Oil

capacity
new

compressor

O
910
1

owt
llllt
blj
f
H
w
s
013
5

rlT
s

0
111
boc

19
bB1rllo

bi2

qqll
no

e

l
bffik
kuanM
mpdi

x
of

Jli
oln

L
il
m
1IlffiiOrb

fler
ot
oldm

F
n

Cheo

f
undeF
r
n
al

1
aQ

r1tIU
Jt
t31
HClJI1
t
JIVU

i
rlUI

1o
ifm
ft
q
t

VI
31U
S
ltlod

bnM
UfO
l
W

kldf

CJiJi
ti

WIf
nl

L
llil
g

ncn
d

oressor

M
et

illpuntinl
botts
if

l9Wul
fb

i
l
fI
I
l

1Ttio
l

qqlJ

necessary
re

Ighten

I

d
210
Air

Conditioning

Tightening

torque

Flexible
hose
to

compressor

dl

t
kg
J
l

IQ

1

Tf
es

oriti
ra

Lbolts

IbP
fo
o15g

m
J

r
f6i
o
20
i
il

f

J

rt
I

r

aGket
engine

Dons
1
1

0

1
1
3
16

5

l11fd
1l

V

f

42
3
3U
llif

Yl

I
u

y
j

3
D
not

remove

IJgs
orflexibie

1i6
e
before

ready
for
immediate
use

4l
di

Wheniiinstallingccomptess
i
turn

it
serWfiPtiffies
SlOt

5
When

connecting
flexible

hose
to

9mPr
ssor

apD
v

a
coat
of
Hfresh

JU
UI

l1Il
t
2
JIUU
uOHltl
r
fl

compressor
0
1

to

fs
aHn
lurfaces
of

1n
1l11
JJ

J
f
PJU

Ht
UlUJ
jJ

joints

AC

26
5

1

Compressor
attachment

2

Compressor

3

Compressor
bracket

4
AHernator

5
Idler

pulley
bracket

AC745

Fig
AC
31

Removing
compressor

6
Evacuate

cooling
system
then
re

charge
with

refrigerant
Refer

to

Evacuating
and

Charging
System
under

l
r

Gen
efal

Servic
ectioo

f
iI
t

7
F

Whenever
remoV
J

compres
r

be
su
J

t8

C6itiu
t
Ua
t
st
make

idie

mV
i
1rJ

adjustril
rit
and

adjwt
beJf
tension

yv

1

r
Y

N
o
s

9

r
h

v

a

For

compressor
diive
belt

and

tOoling
fan
belt
tensions
refer

to

1
Ildlet

Yt
j
WI
c
S
t
q

b

Cheok

refrigerant

leakage
if

neces

sary
correct

dO
I
wl
Tw
l
rt

f
r2

iVl
2
i
l
n

U
l

bnu
1
1Z
2

gf

ign
rb

nojJ

2

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

I

o

Fig
AC
37

Disconnectirt
connector
3

DISASSEMBLY
AND
ASSEMBLY

I
Remove
bracket
and
lead
wire

connector
main

relay
thermo
switch

resistor

motor
etc
from

cooling

unit

2

Remove
five
screws
and
duct

3
Remove
main

relay

4

Remove
thermo
switch

5

Remove
three
screws
and
five

springs
securing

upper
case
lower
case

and

rear
bracket

6
Unfasten

fittings
securing
inlet

and
outlet

pipes
Air

Conditioning

11
To
install

cooling
unit
reverse

the
order
of
removal

Notes

a

Apply
a
coat
of

fresh

compressor

oil
to

sealing
surfaces
when
COD

necting
pipe
joints

b
Use
two
wrenches
when
connecting

cooling
pipes

c
Evacuate
cooling

system
then
re

chaJge
with

refrigerant

Refer
fo

Evacuating
and

Charging

System
under
General
Service
see

tion

9

7

Upper
and
lower
cases
can
now

be

separated

8
Remove
motor
and
fan
as
an

assembly
Also
remove

evaporator

9
Peel
heat

insulating
tape
from

ex

pansion
valve
and
unfasten

clip
secur

ing
expansion
valve

capillary
tube
to

pipe

Remove

expansion
valve
from

evap

orator

10
To
install
reverse
the
order
of

removal

AG
28
d
Check

refrigerant
leakage
if
neces

sary
repair
Refer
to

Checking
for

Leaks
under
General
Service
sec

tion

Tightening
torque

Copper
tube

joint
nut

High

pressure
side
3

8
in

2
5
to
3
5

kg
m

18
to
25
ft
lb

Low

pressure
side
I

2
in

2
5
to
4
0

kg
m

18
to
29
ft
lb

00

L

1

Motor

2

Fan

3
Lower
case

4

Cooler
duct

5

Evaporator

6

Expansion
valve

7

Upper
case

8
Resistor

9
Main

relay

10
Thermo
switch

11
Cable
c

mp

12
Cable

3
Harness

AC725

Fig
A
C
38

Disassembling
cooling
unit

Expansion
valve

tightening

torque

5

kg
m
36
ft
Ib

Notes

a
When

installing
expansion
valve
on

evaporator
make
sure
that

temper

ature
oensing

capillary
tube
is
in
its

proper
position
on
outlet
side

b

Apply
a
coat
of
fresh

compressor

oil
to

sealing
surfaces
of

pipes

INSPECTION

Evaporator

Check

evaporator
for

leakage
or

damage
If

damaged
replace

Expansion
valve

Check

expansion
valve
for

leakage

or

clogging
If

clogged
clean
filter
in

expansion
valve
If

damaged

replace

RECEIVER
DRYER

AND

PIPING

REMOVAL
AND

INSTAUATION

Receiver
dryer

I
Disconnect

battery
ground
cable

2

Discharge
system
Refer
to

Dis

charging
System
under
General
Service

section

3

Disconnect

compressor
lead
wire

at

connector

4

Disconnect

cooling
pipes
at

joints

Acno

Fig
AC
39

Diaconnecting
coo

ing

pipes

Notes

a

Plug
all

piping

joints
immediately

after

pipe
disconnection
to

prevent

entry
of
dust
or
moisture
laden
air

into

receiver

dryer
or
air
aJOdi

tioning
system

b
Use

two
wrenches
when
dIsconnect

ing
cooling
pipes

5

Remove
four
screws

securing

receiver

dryer
bracket

to
vehicle

body

and
detach

compressor
relay
and

pres

sure
switch
as
an

assembly

6
To

install
receiver

dryer
and

piping
reverse
the
order
of
removal
Air

Conditioning

Notes

a

Apply
a
coat
of
fresh

compressor

oil
to

sealing
surfaces
when
con

necting
cooling

pipes

b
Use
two
wrenches
when

connecting

cooling
pipes

c

Evacuate

cooling
system
then
re

charge
with

refrigerant

Refer
to

Evacuating
and

Checking

System
under
General
Service

sec

tion

d
Check

refrigerant

leakage
if
neces

sary
repair

Refer
to

Evacuating
and

Charging

System
under

General
Service
See

tion

Condenser

Disconnect

battery

ground
cable

2

Discharge

system
Refer

to
Dis

charging
System
under
General

Service

section

3
Drain

engine
coolant

4

Remove
radiator

grille

5

Remove

radiator

shroud
and

radiator

On
automatic
transmission

models

disconnect
both

torque
converter
oil

hoses

Note

While

cooling
water
is
hot

take

precautions

against
scalding

6
Disconnect
two

pipes
from

con

denser
remove
two

screws

securing

condenser

Condenser

can
now
be

removed

AC485

Fig
AC

40

Removing
conden
er

Notes

a
Use

two
wrenches
when
disconnect

ing
pipe

joints

b

Plug
openings
immediately
after

disconnecting
pipes

7

To
install

reverse
the
order
of

removal

AC

29
Tightening
torque

Flare
nut
for

copper
tube

from

compressor

2
5
to
4
0

kg
m

i8
to
29
ft
Ib

Flare
nut

for

copper
tube

to
receiver

dryer

2
5

to
3
5

kg
m

i8
to
25
ft
lb

Notes

a
When

disconnecting
and

connecting

cooler

pipes
be
sure
to

use
two

wrenches

b

Apply
a
coat
of
fresh

compressor

oil
to

sealing
surfaces
when

con

necting
cooler

pipes

c

To

prevent

possibility
of

explosion

due
to

high

pressure
within

cooling

system
do

not
clean
condenser

with
steam

Always
use
cold
water

or

cold

compressed
air

d
Evacuate

cooling
system
then
re

charge
with

refrigerant

Refer
to

Evacuating
and

Charging

System
under
General

Service
sec

tion

e
Check

refrigerant
leakage
if
neces

sary
repair
Refer
to

Checking
for

Leaks
under
General
Service

sec

tion

INSPECTION

RecelYer

dryer

Check
for

refrigerant
leakage
or

damage

Check
for

proper
connection
of

two

lead
wires

running
to

pressure

switch

If

any
component

part
is
found

damaged
replace
receiver

dryer
and

pressure
switch
as

an

assembly

Condenser

I

Check

inlet
and
outlet

pipe
joints

and

sealing
surfaces
for

damage
Re

place
parts
if

damaged
or

leaky

2

Clogged
condenser
fins
or

air

pas

sages
may
reduce

cooling
efficiency
of

condenser
Clean
these

areas
with

dry

compressed
air

Piping

Check

piping
for

leakage
If

leakage

occurs
at
connections

retighten

connecting
nuts

Replace
if

leakage

persists