Troubleshooting Possible Problems In Operation - DeVilbiss SRI PRO series Technical Bulletin

TROUBLESHOOTING POSSIBLE PROBLEMS IN OPERATION (CONTINUED)
Fluid leaking or dripping from
cup lid
Starved spray pattern
Excessive overspray
Dry spray
Fluid leaking from packing nut
Fluid leaking or dripping from
front of gun
Fluid dripping or leaking from
bottom of cup
Runs and sags
Cup lid loose .
Dirty cup or lid .
Cracked cup or lid .
Inadequate material flow
Blocked vent in Cup lid
Low atomization air pressure
Air pressure to high .
Gun too far from work surface .
Air pressure too high .
Gun too far from work surface .
Gun motion too fast .
Fluid flow too low .
Packing worn .
Fluid nozzle or fluid needle worn or
damaged .
Foreign matter in fluid nozzle .
Fluid needle dirty or stuck in needle
packing
Wrong size fluid needle or fluid
nozzle .
Cup loose on gun .
Cup fluid inlet seat dirty .
Too much material flow .
Material too thin .
Gun tilted on an angle, or gun
motion too slow .
SB-2-855-B
Push in or replace .
Clean .
Replace cup and lid .
Wind fluid adjusting knob out or
change to larger fluid nozzle size .
Clean lid and unblock vent .
Increase air pressure and rebalance
gun .
Reduce air pressure .
Adjust to correct distance .
Reduce air pressure .
Adjust to correct distance .
Slow down .
Wind out needle adjusting screw or
use larger nozzle size .
Replace .
Replace fluid nozzle and fluid needle .
Clean .
Clean .
Replace fluid nozzle and fluid needle .
Tighten .
Clean .
Turn fluid adjusting knob clockwise
or switch to smaller fluid nozzle and
fluid needle size .
Mix correctly or apply light coats .
Hold gun at right angle to work and
adapt to correct gun technique .
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