Piper Cherokee Six - Page 682

914
CORE
COMPRESSOR
VALVE
(SCHRADER
CHARGING)
INLINE
SERVICE
VALVE (SCHRADER)
Figure
13-2.
Service Valves
13-6.
SERVICE
VALVES.
The
purpose
of the
service
valve
is to
service
the
air
conditioning
system.
(Testing,.
Bleeding,
Evacuating
and Charging).
This
aircraft
is equipped
with
service
valves mounted
in
the suction
and discharge
lines of the
evaporator
assembly.
These
valves are
the "2"
position
type Schrader
valves.
All normal
air
conditioning
service
should
be performed
at
the evaporator
assembly
mounted
valves.
NOTE
Service
valves are
also located
on the compressor.
However.
use
of these
valves
in servicing
is not recommended.
NOTE
If
a Schrader
service
valve
is
not serviceable,
the
core
assembly
must
be replaced.
13-7.
SERVICE
VALVE
REPLACEMENT.
The
valves
on the
compressor
are
sealed with
a
gasket
placed
in the
valve port
boss.
Lubricate
the
gasket
with refrigerant
oil of
the type
used in
the compressor,
place
the valves
with
the tube
fitting
facing
aft and
secure
with .3
2
bolts,
torque to
15-23 inch pounds.
NOTE
Whenever
the
air
conditioning
refrigerant
lines
or system
is
opened
for any
reason,
the lines
and
fittings
should
be
capped
and
sealed
immediately
to
prevent
dirt
and
other
contaminants
from
entering
the
system.
(It is
not advisable
to
put
a plug into
the
hoses or
fittings.)
ACCESSORIES AND UTILITIES
Issued:
8/17/72
PIPER CHEROKEE
SIX SERVICE MANUAL
3G16