HP AUTOMATIC XT SPAY GUNS 311051D manual Troubleshooting

		Troubleshooting
Problem	Cause	Solution
Fluid needle will not trigger.	Loose or missing fluid needle stop	Replace stop or tighten setscrew.
	(29) or setscrew (30).
	Air leaking around piston (3).	Replace o-ring (8) or piston.
	Swollen piston o-ring (8).	Replace o-ring. Do not immerse pis-
		ton in solvent.
	Insufficient air pressure on trigger.	Increase air pressure or clean air
		line.
	Plug (19) is in incorrect fluid port.	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).	Replace o-ring.
	Piston cap (4) not fully tightened.	Tighten piston cap until it bottoms
		out.
	Spring (6) not in place.	Check spring position.
	Swollen piston o-ring (8).	Replace o-ring. Do not immerse pis-
		ton in solvent

311051D 21