Sears 919.1551 - Manual (Page 5)

4. Turn on the air supply and spray solvent through the
spray gun. While spraying, shake the gun up and
down to remove all excess material from the lid.
Repeat Steps 1 -4 above with a clean solvent until all
traces of material are removed.
5. Turn off air supply to gun.
6. To clean the vent orifice and interior of lid, the gun
body assembly must be removed and wiped with
solvent. This is easily accomplished by unscrewing
the cup.
7. Wipe the outside of the spray gun and cup with a
solvent soaked cloth. DO NOT IMMERSE THE GUN
IN SOLVENT - THIS WILL WASH OUT THE LUBRI­
CANTS AND DRY OUT THE PACKINGS.
8. To clean the air cap and fluid tip, remove them, soak in
suitable solvent and wipe clean with a clean cloth. If the
holes are plugged, use a wooden toothpick to remove
any material particles. NEVER use a needle or any
other metal object as this may damage the holes and
result in imperfect spray patterns. When reassembling
the fluid tip take care not to overtighten (5-10 in. lb.
torque is recommended) or cross thread the fluid tip into
the gun body.
Note
If water is used as a solvent to clean the gun,
spray paint thinner or mineral spirits through the
gun after cleaning to remove any excess moisture
and protect parts.
After cleaning the spray gun, apply a few drops of light
household oil to the fluid needle (8) next to the packing
retainer (12). All springs should be given a coating of light
grease periodically.
HINTS FOR GOOD SPRAYING RESULTS
' Hold the gun perpendicular to the surface, 6" to 8"
distance.
' Follow contour.
I Overlap each stroke 50%.
' Ends are feathered by triggering. That is, begin
stroke Defore pulling trigger and releasing just before
ending the stroke.
Spray edges and corners first. This will reduce over­
spray while providing good coverage on corners.
Don’t arc strokes, move the gun parallel to work.
Your pattern should normally be shaped like this.
If not, see Troubleshooting guide below.
TROUBLESHOOTING GUIDE
PROBLEM CAUSE CORRECTION
Heavy top or bottom pattern.
u
Heavy right or left side ■ ^
pattern. ^ A
1 Material build-up on air cap or fluid
* tip. Partially plugged horn holes,
f center holes or fluid tip hole.
Detrmine where material build-up is by inverting cap
and test spraying. If pattern shape stays in same
position, the condition is caused by material build-up
on fluid tip. If pattern changes with cap movement,
the condition is in the air cap.
) \ i
Soak cap or tip in suitable solvent and wipe clean. To
clean orifices use a broom straw or toothpick. Never
use a wire or hard instrument. This damages holes
and distorts spray pattern.
Heavy center pattern. A Too much material. Reduce fluid flow or increase air pressure.
f WARNING 1
RISK OF INJURY OR EQUIPMENT DAM­
AGE. DO NOT EXCEED 50 PSIG AT ANY
TIME.
Material too thick. Thin material.
Split spray pattern. ^ Not enough material. Reduce air pressure or increase fluid flow.
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