Mooney M20R - Compressor Oil Level Check; Compressor Replacement; Evaporator Coil Inspection; Mooney Aircraft

SERVICE
AND
MAINTENANCE
MANUAL
M20R
MOONEY
AIRC
RAFT
CORPORATION
5.
Loosen
belt
tension.
See
Section
21-54-04,
reverse
NOTE
procedure.
If
failed
compressor
contaminated
system
and
system
was
cleaned
and
purged,
additional
6.
Loosen
compressor
mounting
bolts,
refrigerant
oil
may
be
required.
If
failed
compressor
did
not
contaminate
system,
no
7.
Remove
belt
guard
assembly
per
Section
21-54-01,
3.
additional
oil is
required
since
a
new
compressor
contains
the
required
charge.
In
either
case
the
8.
Remove
belt
from
all three
pulleys
per
Section
21-54-01.
receiver-dryer
must
be
replaced.
Oil
may
be
added
9.
Remove
system
suction
and
discharge
hose
con-
(max.
3.4
oz.)
to
compressor
from a
Ddrt
on
back
of
compressor
if
compressor
is
not
installed.
nections
and
cap
them
off
immediately.
Refrigerant
oil
may
be
added
to
compressor~
suction
port
if
compressor
is
already
installed
In
WARNING
aircraft.
All
systems
connections
must
be
capped
to
prevent
water,
dust
or
other
contaminsfes
from
10.
Leak
check
system
per
Section
21-51-00
as re-
entering
system.
quired.
11.
Charge system
per
Section
21-52-00
as
required.
10.
Remove
compressor
mounting
hardware
and
lift
compressor
from
mounting
bracket.
12.
Operate
system
to
verify
compressor
operation
and
system
performance.
2155-04
-COMPRESSOR
REPLACEMENT
2155-05
COMPRESSOR
OIL
LEVEL
CHECK
If
a
new
or
rebuilt
compressor
is
supplied
without
suction
V~en
replacing
the
failed
compressor
containing
uncon-
and
discharge
swivel
fittings
or
pulley,
these
parts
must
taminated
oil
with
a new
compressor,
use
the
following
be
removed
from
the
failed
compressor
and
installed
on
procedure
to
add
the
required
oil
to
the
system.
the
new
compressor.
It
is
recommended
that
a
complete,
1.
Drain
and
measure
oil from
the
failed
compressor.
new,
compressor
assembly
be
installed.
2.
Drain oil
from
the
new
compressor
in
a
clean
con-
NOTE
tainer for
reuse.
If
failed
compressor
has
contaminated
system,
a
3. Measure
an
amount
of
new
oil
equal
to
the
amount
complete
cleaning
of
system
is
required,
Also,
the
drained
from
the
used
compressor
and
pour
it
into
the
receiver-dryer
assembly
must
be
replaced.
Flush
system
with
an
approved
flush
agent
and
purge
with
"eW
compressor.
dry
nitrogen.
Also,
remove
and
clean
elcpanslon
valves.
CAUTION
Only
an
E.S.I.
approved
oil
may
be
used in
this
1.
Lift
compressor
into
support
bracket
and
install
type
of
compressor.
mounting
hardware.
Do
not
overfin
compressor
with
oil
or
system
performance
will
be
affected.
2.
Install
either
new
or
inspected
and
cleaned
old belt
on
to
all
three
pulleys
per
Section
21-54-02.
2156-00
EVAPORATOR
MODULE
ASSEMBLY
INSPECTION
AND
3.
Tighten
mounting
hardware
(temporarily).
MAINTENANCE
PROCEDURE
4.
Verify
alignment
of belt
on
all
pulleys
and
align
per
Section
21-54-03,
rrequired.
Only
field
ser~iceable
high inspection
or
maintenance
com-
ponents
will be
addressed
in the
evaporator
module
section.
5. Loosen
compressor
mounting
nuts
(2
each),
pull
bolts
out
enough
to
install
belt
guard
per
Section
21-54-02.
21-56-01
EVAPORATOR
COIL
INSPECTION
6.
~ghten
belt
guard/compressor
mounting
hardware
per
Section
25-54-02,
4.
The
evaporator
coil
must
be
inspected every
500-800
operating
hours
for
excessive
lint
and/or
other
contami-
7.
Remove
compressor
suction
and
discharge
fitting
nation
in
the
coil
fins.
Clean
as
required
by
using
a
caps
and
connect
system
hoses,
vacuum
or
low
pressure
purge
source.
Bent
coil
fins must
be
combed
to
straighten.
CAUTION
New
compressor
is
supplied
with
10
PSIG
nitrogen
2156-02
CONDENSATE
DRAIN
AND
TUBING
pressue.
Remove
caps
and
vent
slowly.
INSPECTION
NOTE
lightly
apply
R-134a
refrigerant
oil
(RL-100S)
on
fitting
o-nng
and
at
contact
surface
between
tube
Veri4
that the
evaporator
condensate
drain
and
associ-
bead
and
jam
nut.
Apply
a
small
amount
of
thread
ated
tubing
is
not
blocked
or
tubing
kinked.
Clean
and
sealant
to
male
fitting
threads
(stay
clear
of first
re-route
tubing
as
necessary.
2-3
threads).
2136-03
COOL
AIR
DUCTING
INSPECTION
8.
T~ghten
o-rlng
fitting
nuts
to
150-200
in.-
Ibs.
DO
Cool
air
ducting
from
the
evaporator
blower
should be
NOT
OVERTORQUE.
checked
to
assure
that
no
excessive
air loss
is
experi-
9.
Connect
R-134a
service
gauges
to
unit
suction
and
enced
due
to
loose
connections,
cracked
or
kinked
hose
discharge
service
ports.
Repair
as
necessary.
REV.
7-96
21-55-04
Island Enterprises