Graco Fusion A Series Instructions Manual page 34

Troubleshooting
Problem
Fluid mist from mix chamber or air
cap.
Excessive overspray.
Rapid buildup of material on air cap.
Reduced cleanoff air.
Excessive cleanoff air when fluid
valves are closed and gun is
triggered.
Fluid does not shut off when fluid
valves are closed.
Burst of air from muffler when gun is
triggered.
Steady air leakage from muffler.
Air leakage from front air valve.
Air leak around lock ring.
Cannot tighten retaining ring (9) until
it bottoms out.
Excessive air leaking from sides of
gun.
Fluid or chemical is leaking from
sides of gun.
34
Cause
The side seals in the fluid cartridge
(18) are damaged.
The side seal o-rings in the fluid
cartridge (18) are damaged.
The mix chamber (19) is damaged.
Too much cleanoff air.
The air cap holes are plugged.
Too little cleanoff air.
The fluid cartridge front o-ring (18e)
is damaged or missing.
The front o-ring (3) is damaged.
The front o-ring (3) is damaged.
The fluid cartridge front o-ring (18e)
is damaged or missing.
The fluid valves (12b) are damaged.
Normal.
The air valve o-rings (24) are
damaged.
The piston o-rings (16, 17) are
damaged.
The air valve o-rings (24) are
damaged.
The o-ring (21) is damaged.
The air cap (10) was assembled
before retaining ring (9).
The retaining ring (19) is loose.
The o-ring (18a, 18c) is missing on
back of cartridge.
The rear cartridge OD o-ring (18d) is
damaged or missing.
The fluid o-ring (18b) are damaged or
missing.
Solution
Replace. See Inspect the Fluid
Cartridge, page 26.
Replace the side seal o-rings. See
Inspect the Fluid Cartridge, page
26.
Replace the mix chamber. See
Remove the Fluid Cartridge, page
24.
Reduce cleanoff air. See Setup,
page 14.
Clean the air cap holes. See Clean
Air Cap, page 27.
Increase cleanoff air. See Setup,
page 14.
Replace the fluid housing o-ring. See
Parts, page 35.
Replace the front o-ring. See Parts,
page 35.
Replace the front o-ring. See Parts,
page 35.
Replace the fluid cartridge front
o-ring only. See Parts, page 35.
Replace the fluid valves. See Parts,
page 35.
No action required.
Replace the valve o-rings. See
Inspect the Air Valve, page 29.
Replace the piston o-rings. See
Parts, page 35.
Replace the valve o-rings. See
Inspect the Air Valve, page 29.
Replace the o-ring. See Parts, page
35.
Install retaining ring (9) first, then air
cap (10). See Assemble the Spray
Gun, page 13.
Tighten retaining ring.
Replace o-rings. See Parts, page 35.
Replace o-ring. See Parts, page 35.
Replace o-ring. See Parts, page 35.
3A7314B