DeVillbiss Air Power Company SP-100-E - Manual (Page 6)

6 — Eng
Will not spray. (cont'd) Fluid pressure too low with inter-
nal mix cap and pressure tank.
Screw not open enough.
Fluid too heavy for suction feed.
CAUSE CORRECTION
Fluid leakage from packing
retainer nut. Packing nut loose.
Packing worn or dry.
Tighten, but not so tight as to grip needle.
Replace packing or lubricate. See "Mainte-
nance".
Dripping from fluid tip. Dry packing.
Sluggish needle.
Tight packing nut.
Lubricate.
Lubricate.
Adjust.
Runs and sags. Too much material for spray pace.
Material too thin.
Gun tilted on an angle.
Reduce pressure and readjust.
Remix or spray light coats.
Hold gun at right angle to work.
Excessive overspray. Reduce.
Check distance. See "Hints for Good Spraying
Results".
Move at moderate pace, parallel to work sur-
face. See "Hints for Good Spraying Results".
Too much atomization air pres-
sure.
Gun too far from surface.
Improper stroking; i.e., arcing,
moving too fast.
Excessive fog. Too much or quick drying thinner.
Too much atomization air pres-
sure.
Remix.
Reduce.
PROBLEM
Increase fluid pressure at tank.
Open fluid adjusting screw.
Change to pressure feed.
Gun too far from surface
Too much air pressure.
Improper thinner
Move gun closer to surface. See "Hints for
Good Spraying Results".
Reduce pressure.
Follow paint manufacturer's instructions.
Thick dimpled finish "or-
ange peel." Too much ma-
terial coarsely atomized. Gun too close to surface
Air pressure too low.
Improper thinner.
Material not thoroughly mixed.
Surface rough, oily, dirty.
Move gun away from the surface. See "Hints
for Good Spraying Results".
Increase air pressure or reduce fluid pressure.
Follow paint manufacturer's instructions.
Mix thoroughly.
Properly clean and prepare surface.
Thin, sandy coarse finish
drying before it flows out.
TROUBLESHOOTING GUIDE (Cont'd)