Gun Troubleshooting
3A9099A Operation, Repair, Parts
67
Problem
Cause
Solution
Excessive cleanoff air when
fluid valves are closed and
gun is triggered.
The fluid cartridge front o-ring is damaged or
missing.
Replace the fluid cartridge front o-ring only.
See
Fluid does not shut off when
fluid valves are closed.
The fluid valves are damaged.
Replace the fluid valves. See
Burst of air from muffler when
gun is triggered.
Normal.
No action required.
Steady air leakage from
muffler.
The air valve o-rings are damaged.
Replace the valve o-rings. See
The piston o-rings are damaged.
Replace the piston o-rings. See
Air leakage from front air
valve.
The air valve o-rings are damaged.
Replace the valve o-rings. See
Air leak around lock ring.
The o-ring is damaged.
Cannot tighten retaining ring
(9) until it bottoms out.
The spray tip adapter was assembled before
retaining ring.
Install retaining ring (9) first, then spray tip
Excessive air leaking from
sides of gun.
The retaining ring is loose.
Tighten retaining ring.
The o-ring is missing on back of cartridge.
The rear cartridge OD o-ring is damaged or
missing.
Replace o-ring. See
Fluid or chemical is leaking
from sides of gun.
The fluid o-ring are damaged or missing.
Replace o-ring. See