Universal Air Tools UT57A - Manual (Page 5)

Page No 5
Air leaking from Spray Gun
Cause Remedy
- Dirt on air valve seating - Remove and clean
- Worn or damaged seating - Replace
- Broken air valve spring - Replace
- Air Valve Sticking - Lubricate gland and loosen gland nut
- Bent air valve stem - Replace air valve
Material (Paint) leaking from Spray Gun
Cause Remedy
- Material nozzle or needle worn or damaged - Replace
- Foreign body in material nozzle - Remove nozzle and clean
- Broken material needle spring - Replace
- Wrong size of needle - Replace
- Material needle sticking - Remove gland, lubricate and adjust gland nut
- Material nozzle loose - Tighten
- Dirt or lumps in paint - Strain
Jerky or spitting spray
Cause Remedy
- Loose material nozzle and/or air cap - Tighten
- Insufficient material (paint) in container - Replenish
- Dry gland packing or gland nut loose - Lubricate and/or tighten gland nut
- Loose or cracked centre tube in syphon cup
or lid assembly
- Replace
- Obstructed fluid passageways - Clean
- Damaged material needle tip or worn and
damaged nozzle seating
- Replace
Jerky or Spitting Spray
Cause Remedy
- Material too viscous to syphon - Thin
- Blocked vent in lid/plastic tube - Clean
- Poor seal in lid - Replace
- Loose, dirty or damaged container lid and
coupling
- Tighten, clean or replace
Poor quality spray patterns
Cause and remedy - See separate page
Faults & Remedies