Raytheon Beech Baron E55 - Page 106

Raytheon
AiKraft
Company
BARON
55
AND
58
SHOP
MANUAL
REPLENISHING
AIR
CONDITIONING
SYSTEM LUBRICATION
Under
normal
operating
conditions the oil
charge
in the
compressor
should
not
require
periodic
checking.
Unless
the
system
has
suffered
a
catastrophic
failure
such
as
a
broken
line
or
severely
leaking
compressor
seal
the
system
should
not
need the
oil
checked.
NOTE:
If
the
system
is
opened
after the initial
charging,
measure
any
oil lost
in
opening
the
system
and add
to
the
system
only
an
amount
equal
to
the loss.
To
maintain
4
ounces
of
oil in
the
compressor,
the air
conditioning
system
requires
11 to
12
ounces
of
500
viscosity
oil
(35,
Chart
3)
on
TE-1119,
TE-1125
and
After,
and
TH-873,
TH-895
thru
TH-1744
or
13
ounces
of
oil
(67,
Chart
3)
on
TH-1745
and
After.
Satisfactory
operation depends
on
sufficient
lubrication,
but
too
much oil will
decrease
cooling
efficiency.
The air conditioner
compressor
oil
level should be
checked
by
a
qualified
air
conditioner
service
man
if the
refrigerant charge
is
lost.
Check
the
compressor
oil
level
as
follows:
a.
Fabricate
a
dip
stick
by
bending
a
wire
to
a
90"
angle
so
that
1
1/2
inches
of
the
wire
will
insert
into
the
compressor.
b. Paint
the
dipstick
with
a
flat
black
paint.
Allow
sufficient
time
for
the
paint
to
dry.
c.
Start
the
engine
in
accordance with the
applicable
Pilot’s
Operating
Handbook
and
run
the air
conditioning
system
for
15 minutes
with
the
engine running
at
low
rpm
to
allow
the oil
to
accumulate
in
the
compressor.
Observe
the
engine
operating
limitations
as
noted
in
the
applicable
Pilot’s
Operating
Handbook.
Shut
down
the
engine
in
accordance
with
the
applicable
Pilot’s
Operating
Handbook.
d.
Relieve the
system
pressure
by evacuating
with
a
recycle
servicing
unit.
e.
Removethe
oilfillerplug.
f. Insert
the
dipstick
through
the oil filler
port.
Slowly
rotate
the
compressor
clutch
until the
dipstick
will
insert
to
the
bottom of
the
compressor.
g.
Withdraw the
dipstick;
oil should
appear
on
the
dipstick
5/8
inch
below
the
oil filler
port.
Add
oil
as
necessary
to
maintain
this oil
level.
NOTE: Make
sure
that the
O-ring
is
not
twisted
and
that
dirt and
or
foreign
particles
are
not
on
the
seat
of
the
plug.
The
plug
should be
snug.
Do
not
overtighten
the
plug.
h. Install and
secure
the
oil filler
plug.
Torque
the
plug
to
6
to
9
foot-pounds.
If
the
plug
leaks
replace
the
O-ring.
i.
Charge
the
air
conditioning
system
as
noted in
CHARGING
THE
AIR
CONDITIONING
SYSTEM.
j.
Check
the
area
around the filler
plug
for
leaks. If
leaks
exist,
do
not
overtighten
the filler
plug.
Remove
the
plug
as
noted
in
Step
e.
and install
a new
O-ring
after
depressurizing
the
system
with
a
recycling
service
unit.
Secure
I
the
plug
and
recharge
the
system
as
noted
in
Steps
h. and
i..
In order
to
accurately
determine
the oil level
of
the
air
conditioning
system,
the
system
should be
operated
for
several
minutes and the
compressor
removed,
immediately
after
shutdown,
as
noted in
COMPRESSOR
REMOVAL
in
Section
10.
Drain
the
oil
from
the
compressor
into
a
measuring
cup.
If
the total
amount
of oil
drained from
the
compressor
measures
3
to
4
ounces,
the
system
is
fully charged.
If
the
amount
is less than
3
ounces,
add
a
necessary
amount of
oil
to
bring
the total
level to
4
ounces
and
pour
this
amount
back into
the
compressor.
Reinstall
the
compressor
as
noted
in
COMPRESSOR
INSTALLATION
in
Section
10.
E2S
SECTION 2
Dec
Pf