Grizzly H7666 - Manual (Page 17)

Model H7666/H7667 LVLP Spray Gun -17 -
Troubleshooting
Symptom Possible Cause Solution
Fluttering or
Spitting spray. 1. Dry or worn fluid tip seat per-
mits air to seep into fluid pas-
sage.
2. Material level too low.
3. Fluid tip or filter obstructed.
4. Dry needle packing.
1. Tighten fluid tip or replace
seat with new one.
2. Add material.
3. Clean
4. Lubricate needle.
Uneven top or bot-
tom pattern. 1. Atomizing cap holes are
obstructed.
2. Build-up on top or bottom of
fluid tip.
3. Build-up on atomizing cap is
on needle seat.
1. Clear holes.
2. Clean.
3. Clean.
Right or left arc
pattern. 1. Left or right side horn holes
are plugged.
2. Build-up on left or right side of
fluid tip.
3. Build-up of material inside
atomizing cap.
1. Clear holes.
2. Clean.
3. Clean.
Heavy deposit of
material in center. 1. The material flow exceeds the
atomizing cap capacity.
2. Inlet air pressure is too low.
3. Material is too thick.
1. Lower fluid flow.
2. Increase inlet air pressure.
3. Thin material.
Narrow center pat-
tern. 1. Volume control turned in too
far.
2. Inlet air pressure too high.
3. Fluid pressure is too low.
4. Material is too thin.
1. Increase volume.
2. Reduce inlet air pressure.
3. Increase fluid pressure.
4. Adjust material.
No spray output. 1. No pressure at gun.
2. Fluid passages dirty.
3. Fluid control closed.
4. Out of paint.
5. Material too thick.
1. Check air supply.
2. Clean gun, remove any
obstructions.
3. Open.
4. Refill.
5. Thin to manufacturer's rec-
ommendations.