Cessna T188C - Page 57

MODEL 188 & T188 SERIES SERVICE MANUAL
. followed by buffing and polishing, if steps following NOTE
are followed carefully.
a.
Wrap a piece
of No. 320 (or
finer) sandpaper
or
Rubbing plastic
surface
with a dry cloth
abrasive
cloth around
a rubber pad
or wood block.
will build
up an electrostatic
charge
Rub
surface around
scratch with
a circular
motion,
which attracts
dirt particles
and may
keeping abrasive
constantly wet with
clean water to eventually
cause scratching of
surface.
prevent
scratching surface more.
Use minimum
After wax has hardened,
dissipate this
pressure and cover an area large enough to prevent charge by rubbing surface with a slightly
formation of "bull's-eyes"
or other optical
distor- damp chamois.
This will also remove
tions.
dust particles which
have collected while
CAUTION
wax
is
hardening.
f. Minute
hairline scratches
can often
be removed
Do
not use coarse grade abrasive.
Number by rubbing
with commercial automobile
body cleaner,
320 grit or finer
is recommended.
or
fine-grade rubbing
compound.
Apply with a
soft,
clean, dry cloth or imitation chamois.
b. Continue sanding operation, using progressively
finer grade abrasives
until scratches disappear.
3-8. CRACKS.
(See figure 3-1.)
c. When scratches have been
removed, wash area
a. When a crack appears,
drill a hole at end of
thoroughly with clean water to remove all gritty crack to prevent further spreading. Hole should be
particles. The entire sanded area will be clouded approximately 1/8-inch in diameter, depending on
with minute scratches which must be removed to length of crack, and thickness of materal.
restore
transparency.
b. Temporary
repairs to
flat surfaces
can be ac-
d. Apply fresh tallow or buffing compound to a complished by placing a thin strip of wood over each
motor-driven
buffing wheel.
Hold
wheel against
side
of surface,
and inserting
small
bolts through
the
plastic
surface, moving
it constantly
over damaged
wood and
plastic. A cushion
of sheet rubber
or air-
area until
cloudy
appearance
disappears.
A 2000-
craft fabric
should be
placed between
wood
and plastic
foot-per-minute surface
speed is recommended
to
on both sides
prevent overheating
and distortion. (Example:
750 c. A temporary
repair can be made by drilling
rpm polishing
machine with
a 10-inch buffing
bonnet.)
small holes
along both sides
of crack, 1/4-inch
to
1/2-inch
apart, and
lacing edges
together with
soft
NOTE
wire. Small-stranded antenna
wire makes a good
temporary
lacing
material.
This
type of
repair
is
Polishing
can be
accomplished by
hand,
used as
a temporary
measure ONLY,
and as soon as
but will require a considerably
longer facilities
are available, panel
should be replaced.
period of time to attain the same result
as
produced by
a buffing wheel.
3-9. WINDSHIELD.
(See
figure 3-2.)
e. When
buffing
is
finished,
wash
area
thoroughly,
3-10.
REMOVAL
AND
INSTALLATION.
and dry
with a
soft flannel
cloth.
Allow
surface
to
a. Remove
wire
cutter
and mounting
brackets.
cool,
and inspect
area
to determine
if
full transpar-
b.
Drill
out all
rivets securing
retainer
strip lower
ency has been restored.
Apply a thin coat
of hard edge
of windshield.
wax
and polish
surface
lightly
with
a clean
flannel
c.
Remove
screws
on sides
and
along top
of wind-
cloth.
shield.
SHOP NOTES:
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