HP AUTOMATIC XT SPAY GUNS 311051D ユーザーズマニュアル

Fluid needle will not trigger.

Loose or missing fluid needle stop 
(29) or setscrew (30).

Air leaking around piston (3).

Swollen piston o-ring (8).

Insufficient air pressure on trigger.

Plug (19) is in incorrect fluid port.

Replace stop or tighten setscrew.

Replace o-ring (8) or piston.

Replace o-ring. Do not immerse pis-
ton in solvent.

Increase air pressure or clean air 
line.

Move plug to fluid port consistent with 
manifold plumbing, unless you are 
using gun in a circulating system. If 
you are, all fluid ports in gun and on 
manifold should be open.

Fluid does not shut off.

Worn o-ring (11) or (9).

Piston cap (4) not fully tightened.

Spring (6) not in place.

Swollen piston o-ring (8).

Replace o-ring.

Tighten piston cap until it bottoms 
out.

Check spring position.

Replace o-ring. Do not immerse pis-
ton in solvent