Graco 309550Y Clean Mix Chamber Nozzle, Clean Passages, Clean Impingement Ports

Clean Mix Chamber Nozzle

1. Engage piston safety lock, page 10.

TI2409A

2. Refer to TABLE 1. Also see identification chart

under Drill Bit Kits, page 39. Use the appropriate size drill bit to clean mix chamber nozzle (N). If necessary, clean air cap (C) gently with stiff brush.

N

C

			TI2418A
Table 1: Nozzle Drill Bit Sizes
Round Spray		Flat Spray
Mix Chamber	Drill Size	Mix Chamber	Drill Size
Part No.	in. (mm)	Part No.	in. (mm)
AR2020	#58, .042	AF2020	3/32, .094
	(1.00)		(2.35)
AR2929	#55, .052	AF2929	3/32, .094
	(1.30)		(2.35)
AR3737	#55, .052
	(1.30)
AR4242	#53, .060	AF4242	3/32, .094
	(1.50)		(2.35)
AR5252	#50, .070	AF5252	3/32, .094
	(1.75)		(2.35)
AR6060	#44, .086
	(2.15)
AR7070	3/32, .094
	(2.35)
AR8686	#32, 0.116
	(2.90)

Maintenance

Clean Passages

If necessary, clean out passages in fluid housing and handle with drill bits. Refer to TABLE 2 and to Cutaway View on page 26 for diameter and location of passages. All drill bits are available in an accessory kit. Order kit 248969 for Air Purge Handle Drill Kit, see page 40.

Table 2: Passage Diameters

	Ref. Letter	Diameter,
Passage Description	(page 26)	in. (mm)
Optional Air Inlet	C	7/16, 1/8
		(11.0, 3.1)
Purge Air	D	1/8	(3.1)
Piston Air	E, F	1/8	(3.1)
Air Exhaust	G	11/32, 1/8
		(8.7, 3.1)
Air Valve Bore	H	9/32 (7.1)
Cleanoff Air	Not Shown	3/32	(2.35)
Check Valve Holes	Not Shown	3/32	(2.35)
Grease	Not Shown	3/32	(2.35)

Clean Impingement Ports

1. Follow Pressure Relief Procedure, page 15.

2. Disconnect air (D) and remove fluid manifold (M).

M

D

TI2554A

3. Flush Gun, page 20. If gun will not flush, see page

29.

4. Remove Front End, page 27.

309550Y 21