Refrigerant Leaks - Datsun 620 Series 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
cessively
low
If this
caution
is neglected
a
burnt
compressor will result
since heavy
loss
of
refrigerant
usually
indicates
heavy
loss of
compressor
oil
If system has
been exposed
to
atmosphere
for
an
extended
period
of
Air Condition
ing
time
receiver
dryer
must
be
replaced
If leaks
are slight and
no
air is
present
in system add
refrigerant
as
necessary
To
detect leaks refer
to
relative
topics
under
Checking for Leaks
Here is how leaks
are
stopped
I Check torque
on
the connection
fitting and if
too
loose
tighten
to
the
proper torque
Check for
gas leakage
with
a
leak detector
2 If
leakage continues
even
after
AC 18
the
fitting
has
been
retightened dis
charge refrigerant
from system discon
nect
the fittings and check its
seating
face for
damage Always replace
even
if
damage
is
slight
3 Check compressor oil and
add oil
if
required
4
Charge refrigerant
and recheck
for
gas
leaks If
no
leaks
are
found
evacuate
and charge
system