Graco Fusion A Series Instructions Manual page 33

Problem
Gun delays, then actuates abruptly.
Loss of round pattern.
Loss of flat pattern.
Leakage between flat tip and mix
chamber.
Pressure imbalance.
A and/or B fluid inside of the
cartridge.
3A7314B
Cause
Chemical or material has cured
around the side seals in the fluid
cartridge (18).
The retaining ring (9) is not bottomed
out.
Cured material is inside the cartridge
(18).
The retaining ring (19) is not
bottomed out.
The mix chamber nozzle is dirty.
The spray tip is plugged.
The tip is worn.
The mix chamber nozzle is dirty.
The tip is not seated properly.
The o-ring (40) is damaged or
missing.
The impingement ports are plugged. Clean the impingement ports. See
The check valves (26) are plugged.
The viscosities not equal.
The cartridge (18) is plugged.
The side seals in the fluid cartridge
(18) are damaged.
The mix chamber (19) is damaged.
The side seal o-rings in the fluid
cartridge (18) are damaged.
The air cap is tightened while the
fluid valves (12b) are open.
Troubleshooting
Solution
See Inspect the Fluid Cartridge,
page 26. Replace.
Tighten retaining ring until bottomed
out.
Inspect the fluid cartridge (18) and
mix chamber (19) for scratches. See
Inspect the Fluid Cartridge, page
26. Replace.
Tighten retaining ring until bottomed
out.
Clean the mix chamber nozzle. See
Clean Mix Chamber Nozzle, page
22.
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
22.
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 Mix Chamber Impingement
Ports, page 24.
Clean the check valves. See Inspect
the Check Valves, page 23.
Adjust temperature to compensate.
Remove the Fluid Cartridge, page
page 24, then Test Fluid Cartridge
Restriction, page page 26.
Replace. See Inspect the Fluid
Cartridge, page 26.
Replace. See Remove the Fluid
Cartridge, page 24.
Replace the fluid cartridge. See
Inspect the Fluid Cartridge, page
26.
Close valves first.
33