309029D Automatic Delta Spray Air Spray Gun ... - Graco Inc.

TroubleshootingGeneral Troubleshooting (continued)Problem Cause SolutionFluid needle will not trigger.Loose or missing fluid needle stop(29) or setscrew (30).Air leaking around piston (3).Swollen piston o-ring (8).Fluid does not shut off. Worn o-ring (11).Insufficient air pressure on the trigger.Plug (19) is in the incorrect fluid port.Piston cap (4) not fully tightened.Spring (7) not in place.Swollen piston o-ring (8).Replace stop (29) or tighten setscrew(30).Replace o-ring (8) or piston (3).Replace o-ring (8). Do not immersepiston in solvent.Increase the air pressure or clean theair line.Move the plug to the fluid port consistentwith the manifold plumbing, unlessyou are using the gun in a circulatingsystem. If you are, all fluidports in the gun and on the manifoldshould be open.Replace o-ring.Tighten piston cap until it bottomsout.Check spring position.Replace o-ring (8). Do not immersepiston in solvent.309029 17