Piper Cherokee Six - Page 522

PIPER
CHEROKEE
SIX
SERVICE
MANUAL
9-74.
REMOVAL
AND REPLACEMENT
OF FACE
MOUNTED
INSTRUMENTS.
9-75.
GENERAL.
Since
all instruments
are
mounted
in a similar
manner,
a description
of
a
typical
removal and
installation
is provided as
a guide for
the removal and
installation
of the
instruments.
Special
care should
be taken when
any operation
pertaining
to the instruments
is performed.
a. Remove the
face panel by removing
the screws
from around the
perimeter of the
panel.
b.
With the
face panel
removed, the
mounting
screws for the
individual
instruments
will be exposed.
Remove
the connections
to the instrument
prior
to removing
the mounting
screws
of the instrument
to be removed.
NOTE
Tag instrument connections for ease of installation.
c. Installation
of the
instruments
will be in
the reverse
given for
removal. After
the
installation
is completed
and
before replacing
the instrument
face
panel, check
all
components for security
and clearance of the control
column.
d.
The following
procedure
applies
to
those aircraft
having
the
Edo-Aire
air
driven
gyro
installation.
The
use
of Teflon
tape
on fitting
threads
is recommended
and
should
be
installed
in the
following
manner:
CAUTION
Permit
no oil,
grease,
pipe compound
or any foreign
material
to
enter
parts prior
to
installation
of fittings.
Make
certain
all
air
lines
are clean
and
free of
foreign
particles
and/or
residue
before
connecting
lines
to
gyro.
Select
proper
fittings.
NOTE
Use
of thread
lube
on fittings
or in parts
will
create
a warranty
void
condition.
1.
Carefully
lay
Teflon
tape
on the
threads
allowing
one
thread
to be visible
from
the
end
of the
fitting.
Hold
in place
and
wrap
in the
direction
of
the threads
so tape
will
remain
tight
when
fitting
is
installed.
2.
Apply
sufficient
tension
while winding
to assure
that
tape
forms
into thread
grooves.
One full
wrap plus
1/2 inch
overlap
is sufficient.
3.
After
wrap
is
complete,
maintain
tension
and
tear
tape
by pulling
in
direction
of
wrap.
The resulting
ragged
end is
the key to
the tape
staying in
place.
4. Press
tape
well
into threads.
5. Screw
fitting
into part
being
careful
not to
exceed
torque
requirements
as noted
on
decal
located
on
gyro cover.
INSTRUMENTS
Revised:
12/4/79
2L6