DeVillbiss Air Power Company SP-100-E - Manual (Page 5)

5 — Eng
Heavy center pattern. Reduce fluid flow or increase air pressure.
Thin material.
Reduce air pressure or increase fluid flow. Split spray pattern.
Insufficient material.
Gun with cup tipped at excessive
angle.
Obstructed fluid passage or hose.
Loose fluid tip or damaged tip
seat. (Most common cause.)
Loose or cracked fluid tube in cup
or pressure tank.
Too heavy fluid for suction feed.
Dry or worn packing or loose pack-
ing nut.
Fill material container.
Do not tip excessively or rotate fluid tube.
Clean.
Tighten or replace.
Tighten or replace.
Thin material or change to pressure feed.
Lubricate or replace. Tighten.
Gun improperly adjusted.
Dirty air cap.
Fluid tip obstructed.
Sluggish needle.
Readjust gun following instructions carefully.
Clean air cap.
Clean.
Lubricate.
Fan adjustment stem not seating
properly. Clean or replace. Unable to get round spray.
Too much material.
Material too thick.
TROUBLESHOOTING GUIDE
Will not spray. No air pressure at gun.
Internal mix air cap used with suc-
tion feed.
Check air lines.
Change to pressure feed.
PROBLEM CAUSE CORRECTION
Determine where material build-up is by invert-
ing 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.
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 its spray pat-
tern.
Heavy top or bottom
pattern.
Heavy right or left side
pattern.
Material build-up on air cap or
fluid tip. Partially plugged horn
holes, center holes or fluid tip hole.
Not enough material.
Jerky or fluttering spray.
Improper spray pattern.