Installation Of Heated Windshield - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
4-50. INSTALLATION OF HEATED WINDSHIELD.
(Refer to Figure 4-8.) When installing the heated
windshield, to prevent damage. the protective paper on the windshield should remain until the installation
is complete. Do not allow the vinyl tape used to install the heated glass to contact any surface of the plastic
windshield. Use only a non-metallic window sealer.
a. Apply Behr-Manning Vinyl Sponge Tape 1 x 1/16 inches. P/N 542 or equivalent on the outside
surface of the windshield. around the outer edges.
b. Apply masking tape around windshield and along the edge of the collar. skins and trim strip before
applying SEMKIT SEALER PR 1221-B2 or PR1425 on the outside surface of the windshield around the
edges of each side and top.
c. Slide the windshield aft and up into place. Use caution not to dislocate the sealer or vinyl tape
around the edges of the windshield.
d. Install outside center trim strip. machine screws and round nuts. Do not tighten.
e.
Install the retainer screws around the top. outboard side and bottom of the windshield. Do not
tighten.
f. Torque (std. torque) the screws that secure the retainer molding around the inside of the
windshield.
g. Torque the retainer screws around the outside of the windshield and center trim strip. using
standard torque table.
h. Apply SEMKIT SEALER PR 1221-B2 or PR1425 at the bottom of the windshield in the hollow
between the outside edge and the channel. Do not build up the sealer above the inside contour of the collar
molding. thus causing a poor fit of molding against the windshield.
i.
Install the collar molding around the bottom of the windshield and tighten the retainer screws
until washers begin to compress snug against strip.
j. Apply SEMKIT SEALER PR 1221-B2 or PR 1425 to any areas around windshield that may allow
water to penetrate past the windshield.
k. Install switch panel and trim molding around inside of windshield.
l. Remove excess exposed sealer or tape.
m. Connect the electrical leads to the windshield. Ascertain that the positive lead at the center of
windshield is connected to the red terminal marked "P." The heat sensor leads connect to the white terminals.
(Refer to Heated Windshield Schematic. Section X1.)
n. Remove protective covering from windshield.
o. Check operation of the windshield heating element and timer by first connecting a 24-volt test
light to the positive and negative terminals on the windshield.
p.
Turn on the switch labeled "Windshield Heat." The test light should glow indicating voltage is
being delivered to the windshield.
q. Hold a hand against the windshield to determine that the windshield heating element is operating
and current is flowing. The test light should go out before it becomes too hot to hold hand against the wind-
shield. indicating that the temperature sensing element is operating properly and it has passed through its
thermostatic on off cycle. Repeat this for one or two more cycles.
r. When check is completed. turn off the switch.
Revised: 10/5/83
STRUCTURES
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