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