Technical data

309030 17
Troubleshooting
General Troubleshooting (continued)
Problem Cause Solution
Fluid needle will not trigger. Loose or missing fluid needle stop
(29) or setscrew (30).
Replace stop (29) or tighten setscrew
(30).
Air leaking around piston (3).
Swollen piston o-ring (8).
Insufficient air pressure on the trigger.
Plug (19) is in the incorrect fluid port.
Replace o-ring (8) or piston (3).
Replace o-ring (8). Do not immerse
piston in solvent.
Increase the air pressure or clean the
air line.
Move the plug to the fluid port consis-
tent with the manifold plumbing, un-
less you are using the gun in a circu-
lating system. If you are, all fluid
ports in the gun and on the manifold
should be open.
Fluid does not shut off. Worn o-ring (11).
Piston cap (4) not fully tightened.
Spring (7) not in place.
Swollen piston o-ring (8).
Replace o-ring.
Tighten piston cap until it bottoms
out.
Check spring position.
Replace o-ring (8). Do not immerse
piston in solvent.