Piper Cherokee Six Service Manual 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