Graco Fusion AP Instructions Manual page 31

Problem
Loss of flat pattern
Leakage between flat tip and mix
chamber
Pressure imbalance
A and/or B fluid in gun air section
Fluid mist from mix chamber or air
cap
Excessive overspray
309550ZAP
Cause
The spray tip is plugged.
The tip is worn.
The mix chamber nozzle is dirty.
The tip is not seated properly.
The o-ring is damaged or missing
(40).
The impingement ports are plugged. Clean the impingement ports. See
The check valves are plugged (26).
The viscosities not equal.
The side seals are damaged (18c).
The mix chamber is damaged(19).
The side seal o-rings are damaged
(18d, 18e).
The air cap is tightened while the
fluid valves (12b) are open.
The side seals (18c) are damaged.
The side seal o-rings (18d, 18e) are
damaged.
The mix chamber (19) is damaged.
Too much cleanoff air.
Troubleshooting
Solution
Clean in compatible solvent. See
Reposition or Replace Flat Spray
Tips, page 18.
Replace the flat spray tip. See
Reposition or Replace Flat Spray
Tips, page 18.
Clean the mix chamber nozzle. See
Clean Mix Chamber Nozzle, page
23.
Reassemble. See Reposition or
Replace Flat Spray Tips, page 18.
Replace the flat spray tip o-ring. See
Reposition or Replace Flat Spray
Tips, page 18.
Clean Impingement Ports, page 23.
Clean the check valves. See Inspect
the Check Valves, page 26.
Adjust temperature to compensate.
Replace. See Inspect the Mix
Chamber and Side Seal
Cartridges, page 24.
Replace. See Inspect the Mix
Chamber and Side Seal
Cartridges, page 24.
Replace the side seal o-rings. See
Inspect the Mix Chamber and Side
Seal Cartridges, page 24.
Close valves first.
Replace the side seals. See Inspect
the Mix Chamber and Side Seal
Cartridges, page 24.
Replace the side seal o-rings. See
Inspect the Mix Chamber and Side
Seal Cartridges, page 24.
Replace the mix chamber. See
Inspect the Mix Chamber and Side
Seal Cartridges, page 24.
Reduce cleanoff air. See Setup,
page 15.
31