Cessna 188 Series Service Manual page 57

MODEL 188 & T188 SERIES SERVICE MANUAL
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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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