Graco Inc 288891, 289240, 289242, 288890, 289239, 288895 Troubleshooting, Problem Cause Solution

		Troubleshooting
Troubleshooting
Problem	Cause	Solution
	One side of air cap (1) dirty or	Clean air cap orifices. See page 6. Blow
	clogged.	air through orifices until clean. If air cap
		holes are damaged, replace air cap.
	a. Loose air cap (1).	a. Tighten.
	b. Dried or damaged air	b. Rotate air cap 180°.
	cap (1) or fluid nozzle (2).	If pattern follows air cap, problem is
		in air cap. Clean and inspect. See
		page 6. If pattern is not corrected,
		replace air cap.
		If pattern does not follow the air cap,
		the problem is with the fluid nozzle.
		Clean and inspect the nozzle. See
		page 6. If the pattern is not corrected,
		replace nozzle.
	a. Atomization air pressure	a. Reduce air pressure.
	set too high.
	b. Spraying a thin material in	b. Increase material control by turning
	too wide of a pattern.	fluid adjustment knob (8-2) counter-
		clockwise while reducing spray width
		by turning pattern adjustment
		knob (5) clockwise.
		Or increase material viscosity.
	Air getting into paint stream.
	a. Cup almost empty.	a. Fill cup.
Spitting	b. Dry needle packing (3-1,	b. Loosen packing seat and put a few
	3-2).	drops of machine oil on packing (3-1,
		3-2). Retighten seat (4).
	c. Fluid nozzle (2) too loose.	c. Tighten.
	d. Dried material between	d. Clean nozzle and front of gun. See
	nozzle (2) and gun body.	page 6.
	e. Damaged needle seal.	e. Replace seal. See page 8.
Other spray pattern	a. Gun not properly adjusted.	a. See page 5.
problems.
	b. Sluggish needle (10).	b. Clean and lubricate.
Unable to get round	Pattern adjustment knob (5)	Clean or replace knob.
pattern.	not seating properly.
Will not spray.	a. No air pressure at gun.	a. Check air supply and air lines.
	b. Cup empty.	b. Fill cup.
	c. Fluid adjustment knob (8-2)	c. Adjust knob (8-2) counterclockwise.
	turned too far clockwise.
	d. Fluid too thick for gravity	d. Thin material.
	feed.

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