Graco Fusion AP Instructions Manual page 32

Troubleshooting
Problem
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.
32
Cause
The air cap holes are plugged.
Too little cleanoff air.
The fluid housing o-ring (23) is
damaged or missing.
The front o-ring (3) is damaged.
The front o-ring (3) is damaged.
The fluid housing o-ring (23) 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).
Solution
Clean the air cap holes. See Clean
Air Cap, page 23.
Increase cleanoff air. See Setup,
page 15.
Replace the fluid housing o-ring. See
Parts, page 33.
Replace the front o-ring.See Parts,
page 33.
Replace the front o-ring. See Parts,
page 33.
Replace the fluid housing o-ring. See
Parts, page 33.
Replace the fluid valves.
No action required.
Replace the valve o-rings. See
Inspect the Air Valve, page 28.
Replace the piston o-rings. See
Parts, page 33.
Replace the valve o-rings. See
Inspect the Air Valve, page 28.
Replace the o-ring. See Parts, page
33.
Install retaining ring (9) first, then air
cap (10). See Inspect the Mix
Chamber and Side Seal
Cartridges, page 24.
309550ZAP