Troubleshooting, Symptom possible cause solution – Grizzly H7666 User Manual

Page 17

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Model H7666/H7667 LVLP Spray Gun

-17

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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.

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