Harbor Freight Tools CENTRAL PNEUMATIC 93305 - Manual (Page 15)

For technical questions, please call 1-800-444-3353. SKU 93305 Page 15
If the steps above do not solve the problem or if the repairs involved are too
complex, contact a qualified technician.
Troubleshooting (continued)
Problem Cause Solution
Sputtering Spray 1. Low material level
2. Cup tipped too far
3. Clogged Air Vent
4. Loose fluid inlet connections
5. Dry or loose fluid needle
Packing Nut
6. Loose/damaged fluid tip/seat
1. Refill
2. Hold upright
3. Clean vent hole
4. Tighten
5. Lubricate and/or tighten
6. Adjust or replace
Will Not Spray 1. No pressure at gun
2. Fluid control not open enough
3. Fluid too thick 1. Check air hoses
2. Open fluid control
3. Thin fluid or increase pressure
(within Maximum range)
Overspray 1. Improper application speed
2. Improper distance from
workpiece
3. Too much pressure
1. Move moderately and parallel
2. Adjust distance
3. Reduce air pressure
Fluid Tip Leakage 1. Dirty tip
2. Tight Packing Nut
3. Broken fluid needle spring
4. Worn or damaged tip 1. Clean
2. Loosen Packing Nut
3. Replace
4. Replace tip and/or needle
Air Leaking from Air Cap 1. Dirty air valve/seat
2. Sticking air valve
3. Damaged air valve spring
4. Worn/damaged air valve/seat
5. Bent valve stem 1. Clean
2. Lubricate
3. Replace
4. Replace
5. Replace
Fluid Leaking from Packing Nut 1. Packing Nut loose
2. Packing worn or dry
1. Tighten without restricting
2. Replace or lubricate (non-
silicone)