Mooney M20K - Page 18

MOONEY
AIRCRAFT
CORPORATION
M20K
SERVICE
AND
MAINTENANCE
MANUAL
3.
Fuel,
air,
oil and
hydraulic
oil lines
and hoses
shall
Fuel,
Hydraulic,
Air,
Oil Lines Use
"Parker
Thread
be
inspected
as
applicable
for:
cracks,
dents,
kinks,
Lube"
or
equivalent
on
male
frttings
only.
Apply
deten’oration,
obstruction,
chaffing,
Improper
bend
lubn’cant,
omitting
the
first
two
threads,
span’ngly
and
radius,
and
insecure
installation.
Replace
or
correct
if
carefully.
any
of these
conditions
e~dst.
Hose
clamp
installations
Engine
Fittings
Use
only
aircraft
engine
oil
to
on
fuel and
hydraulic
systems
between
systems
or
lubn~cate
fittings
threaded
directly
to
engine.
between
systems
and
the
engine
shall
be
torqued
to
25
inch
pounds.
Hose
clamp
installations
on
blast
tubes,
Vacuum
Lines
No
lubrication
is
to
be
used.
Check
air
ducts,
vacuum
lines,
drain
and vent
lines
shall
be
manufacturers
instructions
when
installing
components.
torqued
to
15
inch
pounds.
Refer
to
Section
37
for
maintenance
procedures
on
vacuum
system.
4.
Pipe
Threads
Tightening
and
torque
procedures.
Lubric~ite
pipe
threads
as
follows:
Tapered
Threads
Use
TeRon
Threadseal
Tape.
Oxygen
Lines
Use
only
Mil-T-5542
thread
(1)
Continue
to
tighten
until
frtting
is
correctly
compound
or
Teflon
thread
seal
tape
on
threads
of
positioned
but do
not
overrun
or
backoff.
valves,
connectors,
fittings, parts
or
assemblies
which
(2)
If
leaks
are
detected,
tighten
one
full
turn
more.
might
come
in
contact
with
o~cygen.
(3)
If
leaks
pers~t,
the
parts
should
be
disconnected
The
thread
compound
must
be
applied
sparingly
to
the
and
rejected;
replace
with
new
components.
first
three
threads
of
the mail
fitting
only.
No
compound
5. Bolts
and
nuts
in
critical
areas
shall
be
inspected
is
to
be
used
on
the
coupling
sleeves
or
on
the
outside
of
the
tube flares.
Extreme
care
should
be
exercised
to
for:
fretting, wear,
damage,
stretch,
proper
torque,
prevent
the
contamination
of
the
thread
compound
or
(Figure
52)
and
safetying.
teflon
tape
with
oil,
grease
or
other
lubn’cant.
TORQUE
TABLES
FLARE
NUT
TORQUE
VALUES-
Tighten
to
minimum
torque
value
for
appropn’ate
size
as
shown
(Figure
5-1).
FITTING
SIZE
I
ALUMINUM
TUBING
STEEL
TUBING
TORQUE-
IN.
LBS.
MINIMUM
MAXIMUM
MINIMUM
MAXIMUM
-3
30
70
-4
40
65
50
90
-5
60
80
70
120
-6
75
125
9
150
-8
150
250
155
250
-10
200
350
300
400
-12
300
500
30
575
-16
500
700
550
750
-20
600
900
-24
600
900
FLARE
NUT
TORQUE
FIGURE
51
5-20-01
OLDWILLWAYNE