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Model H7668 Spray Gun w/Pressure Cup -19-
Symptom Possible Cause Solution
Excessive over-
spray.
1. Fluid pressure too high.
2. Gun is too far from surface.
3. Spraying too fast.
1. Reduce fluid pressure.
2. Keep gun at recommended
distance.
3. Slow down and maintain
consistent, even parallel
stroke.
Unable to control
spray fan.
1. Pattern adjustment screw is
not seating properly
.
2. Atomizing cap is loose.
1. Clean or replace.
2. Tighten atomizing cap.
Runs and sags. 1. Damaged seal. 1. Replace damaged seals.
Material leaks from
pressure cup
.
1. Cap not secure.
2. Hose connections not tight.
3. Leaking from cap vent hole.
1. Tighten
.
2. Tighten.
3. Hold gun upright do not tilt.
Material leaks from
gun.
1. Fluid tip loose.
2. Fluid hose connection is not
tight.
3. Dry or damaged seals.
4. Excessive pressure.
1. Tighten.
2. Tighten.
3. Replace seals.
4. Reduce pressure.
Thick dimpled finish
aka "Orange Peel."
1. Holding gun too close to sur-
face.
2. Inlet air pressure too low.
3. Material not properly mixed.
4. Surface is dirty or oily.
1. Spray at recommended dis-
tance.
2. Check inlet air pressure.
3. Follow manufacturer's
instructions.
4. More surface prep is
required.
Dry Spray.
1. Inlet air pressure too high.
2. Gun too far from surface.
3. Gun stroke too fast.
1. Lower inlet air pressure.
2. Keep gun at recommended
distance.
3. Slow down and maintain
consistent even parallel
stroke.
Gun leaks from
fluid tip.
1. Debris will not let the needle
seat with the fluid tip.
1. Clean or replace both.
Excess pressure in
pressure cup.
1. Safety valve not working. 1. Discontinue use!
2. Relieve pressure.
3. Replace safety valve.
Contaminated
paint, aka "Fish
Eyes.
1. Water or oil in the air line. 1. Install an in-line air filter.
2. Replace air line.