DATSUN PICK-UP 1977 Service Manual

DATSUN PICK-UP 1977 Service Manual PICK-UP 1977 DATSUN DATSUN https://www.carmanualsonline.info/img/56/56909/w960_56909-0.png DATSUN PICK-UP 1977 Service Manual
Trending: radiator cap, engine, wiper fluid, headlights, check transmission fluid, rear view mirror, high beam

Page 501 of 537

DATSUN PICK-UP 1977  Service Manual 
DISCHARGING 
SYSTEM

The

pressurized 
refrigerant 
gas 
Ul

side

system 
must 
be

discharged 
to 
a

pressure 
approaching 
atmospheric

pressure 
prior 
to

evacuating 
refrigerant

inside

syste

Page 502 of 537

DATSUN PICK-UP 1977  Service Manual 
J

I

1 
Air

Conditioning

J

lJ

R

J

g

j

ru

Fig 
A 
C 
l8

Euacuating

system 
First

step
AC736

Fig 
AC

19

Euacuatingsystem 
Second

step
AC737

CHARGING

REFRIGERANT

I 
Install

manifold

Page 503 of 537

DATSUN PICK-UP 1977  Service Manual 
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

Page 504 of 537

DATSUN PICK-UP 1977  Service Manual 
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

Page 505 of 537

DATSUN PICK-UP 1977  Service Manual 
3

Piping

Flared 
section 
of

high 
pressure 
and

low

pressure 
flexible

hose

Pipe 
connections

rvice

valve

4

Evaporator 
housing

Jnlet 
and

outlet

pipe 
connections

Expansionvalve

ELE

Page 506 of 537

DATSUN PICK-UP 1977  Service Manual 
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 
20

Page 507 of 537

DATSUN PICK-UP 1977  Service Manual 
REFRIGERANT

LEAKS

If 
leaks 
are

noticeable

leaky 
parts

should

be

repaired 
Then

system

should 
be

filled 
with

refrigerant 
Do

not

operate 
compressor 
with

refriger

ant

level 
e

c

Page 508 of 537

DATSUN PICK-UP 1977  Service Manual 
Air

Conditioning

TROUBLE 
DIAGNOSES 
AND 
CORRECTION

CONTENTS

COOLING 
DIAGNOSES

FUNCTION 
TEST

STANDARD 
PERFORMANCE

PERFORMANCE

TEST 
DIAGNOSES 
AC19

AC 
20

AC 
20

AC21 
COMPRESSOR

DIAG

Page 509 of 537

DATSUN PICK-UP 1977  Service Manual 
FUNCTION 
TEST

STANDARD 
PERFORMANCE

The 
air 
conditioner 
on 
the

model

620

has 
the 
below

performance 
char

acteristics 
when 
all 
systems 
are 
in

good

condition

Compressor 
pressure

Page 510 of 537

DATSUN PICK-UP 1977  Service Manual 
Air

Conditioning

PERFORMANCE 
TEST 
DIAGNOSES

Condition

Discharge 
air 
too 
warm

a 
Both

discharge 
and 
suction

pres

sure 
too

high

b 
Both

discharge 
and 
suction

pres

sure 
too 
low
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