Troubleshooting Chart; Corrective Action - Husky HDS790 Instructions D'utilisation Et Manuel De Pièces

troubleshooting chart

Stop using tool immediately if any of the following problems occur. Serious personal injury
could occur. Any repairs or replacements must be done by a Qualified Service Person or
Authorized Service Center.
Symptom
Right or left
heavy spray
pattern
Top or
bottom
heavy spray
pattern
Split spray
pattern
Center
heavy spray
pattern
Sputtering
spray
Fluid leaking from packing
nut
Air leaking from air cap
without pulling trigger
Fluid leaking from fluid tip
of pressure feed spray gun
Excessive overspray
Will not spray
Possible cause(s)
1. Holes in left or right side of the air cap
are plugged
2. Dirt on left or right side of fluid tip
1. Dried material at top or bottom of fluid
tip
2. Loose air cap or dirty seat
3. Air cap plugged
1. Fan pattern open too far
2. Fluid turned in too far
3. Atomization air too high
1. Fan adjustment partially closed
2. Material too thick
3. Atomization pressure too low
1. Material level too low
2. Container tipped too far
3. Loose fluid inlet connection
4. Loose or damaged fluid tip / seat
5. Dry or loose fluid needle packing nut
6. Air vent clogged
1. Packing nut loose
2. Packing worn or dry
1. Sticking air valve stem
2. Contaminate on air valve or seat
3. Worn or damaged air valve or seat
4. Broken air valve spring
5. Bent valve stem
1. Packing nut too tight
2. Fluid tip worn or damaged
3. Foreign matter on tip
4. Fluid needle spring broken
1. Too high atomization pressure
2. Too far from work surface
3. Improper stroking (arcing, gun motion
too fast)
1. No pressure at gun
2. Fluid control not open enough
3. Fluid too heavy

corrective action

1. Clean. Use only non-metallic pick
2. Clean
1. Clean
2. Clean and tighten
3. Clean. Use only non-metallic pick
1. Partially close the pattern adjustment
2. Increase fluid
3. Reduce atomization air pressure
1. Open fan pattern adjustment
2. Thin to proper viscosity
3. Increase atomization pressure
1. Refill
2. Hold more upright
3. Tighten
4. Adjust or replace
5. Lubricate and or tighten
6. Clear vent hole
1. Tighten, but do not restrict needle
2. Replace or lubricate (non-silicone oil)
1. Lubricate
2. Clean
3. Replace
4. Replace
5. Replace
1. Adjust
2. Replace tip and/or needle
3. Clean
4. Replace
1. Reduce pressure
2. Adjust to proper distance
3. Move at moderate pace, parallel to surface
1. Check air lines
2. Open fluid control
3. Thin fluid or change to pressure feed system
7
HDS790