| SYMPTOM | CAUSE | SOLUTION |
| Gun does not fully actuate when triggered. | Safety lock engaged. | Disengage safety lock |
| Plugged muffler | Clean | |
| Damaged air valve o-rings | Replace | |
| SYMPTOM | CAUSE | SOLUTION |
| Fluid does not spray when gun is fully actuated. | Closed fluid valves | Open |
| Plugged impingement ports | Clean | |
| Plugged check valves | Clean | |
| SYMPTOM | CAUSE | SOLUTION |
| Gun actuates slowly. | Plugged muffler | Clean |
| Damaged piston o-rings | Replace | |
| Dirty air valve, or damaged o-rings | Clean air valve or replace o-rings | |
| SYMPTOM | CAUSE | SOLUTION |
| Gun delays, then actuates abruptly. | Cured material around side seals | Inspect side seals and mix chamber for scratches. Replace |
| Retaining ring not bottomed out | Tighten retaining ring until bottomed out | |
| SYMPTOM | CAUSE | SOLUTION |
| Loss of round pattern. | Dirty mix chamber nozzle | Clean |
| SYMPTOM | CAUSE | SOLUTION |
| Loss of flat pattern. | Plugged spray tip | Clean in compatible solvent |
| Worn tip | Replace | |
| Dirty mix chamber nozzle | Clean | |
| SYMPTOM | CAUSE | SOLUTION |
| Leakage between flat tip and mix chamber. | Damaged side seals | Replace |
| Damaged mix chamber | Replace | |
| Damaged side seal o-rings | Replace | |
| Tightened air cap with fluid valves open | Close valves first | |
| SYMPTOM | CAUSE | SOLUTION |
| Fluid mist from mix chamber or air cap. | Damaged side seals | Replace |
| Damaged side seal o-rings | Replace | |
| Damaged mix chamber | Replace | |
| SYMPTOM | CAUSE | SOLUTION |
| Excessive overspray. | Too much cleanoff air | Reduce |
| SYMPTOM | CAUSE | SOLUTION |
| Rapid buildup of material on air cap. | Plugged air cap holes | Clean |
| Too little cleanoff air | Increase | |
| Damaged/missing fluid housing o-ring | Replace | |
| Damaged front o-ring | Replace | |
| SYMPTOM | CAUSE | SOLUTION |
| Reduced cleanoff air. | Damaged front o-ring | Replace |
| SYMPTOM | CAUSE | SOLUTION |
| Excessive cleanoff air when fluid valves are closed and gun is triggered. | Damaged/missing fluid housing o-ring | Replace |
| SYMPTOM | CAUSE | SOLUTION |
| Fluid does not shut off when fluid valves are closed. | Damaged fluid valves | Replace |
| SYMPTOM | CAUSE | SOLUTION |
| Burst of air from muffler when gun is triggered. | Normal | No action required |
| SYMPTOM | CAUSE | SOLUTION |
| Steady air leakage from muffler. | Damaged air valve o-rings | Replace |
| Damaged piston o-rings | Replace | |
| SYMPTOM | CAUSE | SOLUTION |
| Air leakage from front air valve. | Damaged air valve o-rings | Replace |
| SYMPTOM | CAUSE | SOLUTION |
| Air leak around lock ring. | Damaged o-ring | Replace |
| SYMPTOM | CAUSE | SOLUTION |
| Cannot tighten retaining ring until it bottoms out. | Air cap assembled before retaining ring | Install retaining ring first, then air cap |