Graco 309550Y important safety instructions Problem Cause Solution

Troubleshooting

PROBLEM	CAUSE	SOLUTION
A and/or B fluid in gun air section.	Damaged side seals (18c).	Replace, page 29.
	Damaged mix chamber (19).	Replace, page 29.
	Damaged side seal o-rings (18d,	Replace, page 29.
	18e).
	Tightened air cap with fluid valves	Close valves first.
	(12b) open.
Fluid mist from mix chamber or air	Damaged side seals (18c).	Replace, page 29.
cap.
	Damaged side seal o-rings (18d,	Replace, page 29.
	18e).
	Damaged mix chamber (19).	Replace, page 29.
Excessive overspray.	Too much cleanoff air.	Reduce, page 13.
Rapid buildup of material on air cap.	Plugged air cap holes.	Clean, page 20.
	Too little cleanoff air.	Increase, page 13.
	Damaged/missing fluid housing	Replace, page 29.
	o-ring (23).
	Damaged front o-ring (3).	Replace, page 29.
Reduced cleanoff air.	Damaged front o-ring (3).	Replace, page 29.
Excessive cleanoff air when fluid	Damaged/missing fluid housing	Replace, page 29.
valves are closed and gun is trig-	o-ring (23).
gered.
Fluid does not shut off when fluid	Damaged fluid valves (12b).	Replace.
valves are closed.
Burst of air from muffler when gun is	Normal.	No action required.
triggered.
Steady air leakage from muffler.	Damaged air valve o-rings (24).	Replace, page 33.
	Damaged piston o-rings (16, 17).	Replace, page 32.
Air leakage from front air valve.	Damaged air valve o-rings (24).	Replace, page 33.
Air leak around lock ring.	Damaged o-ring (21).	Replace, page 29.
Cannot tighten retaining ring (9) until	Air cap (10) assembled before retain-	Install retaining ring (9) first, then air
it bottoms out.	ing ring (9).	cap (10), page 30.

24 309550Y