refrigerant type DATSUN PICK-UP 1977 Service Manual
[x] Cancel search | Manufacturer: DATSUN, Model Year: 1977, Model line: PICK-UP, Model: DATSUN PICK-UP 1977Pages: 537, PDF Size: 35.48 MB
Page 504 of 537

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
Page 526 of 537

INSPECTION
Check
for
gas
leakage
as
follows
I
Plug
high
and
low
pressure
joints
on
compressor
with
blind
caps
2
Connect
charging
hoses
in
lines
between
manifold
gauge
and
high
and
low
pressure
service
valves
Connect
refrigerant
can
to
middle
hose
of
manifold
gauge
3
Open
valve
of
can
tap
and
charge
refrigerant
Loosen
oil
filler
plug
at
side
of
compressor
to
purge
air
out
of
compressor
4
Turn
shaft
5
or
6
turns
Then
confirm
that
pressure
does
not
decrease
on
low
pressure
gauge
If
gauge
indicates
a
pressure
decrease
there
is
a
leak
Conduct
a
leak
test
Under
such
a
condition
remove
and
then
install
parts
again
CYLINDER
HEAD
AND
VALVES
Insufficient
refrigerant
compression
is
likely
to
be
caused
by
damaged
head
gasket
or
damaged
valves
Prior
to
servicing
the
head
and
valve
plate
both
service
valves
should
be
opened
to
free
any
gas
pressure
which
may
be
in
the
compressor
REMOVAL
I
Remove
the
bolts
from
flanged
type
service
valves
using
Torx
Driver
Bit
Note
The
direction
of
flanged
type
service
valves
should
be
noted
for
reinstallation
AC812
Fig
AC
66
Removing
service
valves
2
Remove
the
remaining
bolts
in
the
head
Air
Conditioning
AC813
Fig
A
C
6
7
Removing
cylinder
head
bolts
3
Remove
valve
plate
and
head
from
cylinder
by
prying
or
tapping
under
the
ears
which
extend
from
valve
plate
If
head
and
valve
plate
adhere
hold
head
and
tap
valve
plate
ears
away
from
head
with
a
soft
hammer
Note
Do
not
hit
or
tap
head
to
separate
head
and
valve
plate
be
3use
damage
to
head
may
result
Fig
AC
68
Removing
valve
plate
and
head
4
When
removing
the
gaskets
use
a
sharp
edged
knife
Notes
a
In
removing
head
gasket
be
very
careful
not
to
damage
machined
sealing
surface
b
Do
not
reuse
gaskets
AC815
Fig
A
C
69
Removing
gasket
AC37
INSTALLATION
Valves
and
valve
plates
are
furnish
ed
only
as
a
complete
assembly
I
Apply
a
thin
film
of
clean
refrig
eration
oil
on
area
of
crankcase
to
be
covered
by
cylinder
gasket
2
Place
cylinder
gasket
in
position
on
cylinder
so
dowel
pins
in
crankcase
go
through
dowel
pin
holes
in
cylinder
gasket
3
Apply
a
thin
film
of
clean
refrig
eration
oil
to
top
and
bottom
valve
plate
areas
to
be
covered
by
gaskets
AC816
Fig
A
C
70
Applying
clean
refrigeration
oil
4
Place
valve
plate
in
position
on
cylinder
gasket
so
discharge
valve
as
semblies
i
e
smaller
diameter
assem
blies
with
restrainer
over
valve
reed
are
facing
up
and
locating
dowel
pins
go
through
dowel
pin
holes
in
valve
plate
Fig
A
C
71
Placing
valve
plate