Graco 309550ZAE important safety instructions Impingement Port Drill Bit Sizes, Cbip

Maintenance

5. Push mix chamber forward until impingement ports

(IP) are visible. See TABLE 3 for appropriate size drill to clean ports. Also see identification chart under Drill Bit Kits, page 39. Some mix chambers have counterbored holes (CB) and require two drill sizes to clean impingement ports completely.

Table 3: Impingement Port Drill Bit Sizes

Mix Chamber	Impingement Port (IP)	Counterbore (CB)
Part No.	Drill Bit Size	Drill Bit Size
	in. (mm)	in. (mm)
AR2020	#76, .020 (0.50)	#53, .060 (1.50)
AR2929	#69, .029 (0.70)	#53, .060 (1.50)
AR3737	#63, .037 (0.94)	N/A
AR4242	#58, .042 (1.00)	N/A
AR5252	#55, .052 (1.30)	N/A
AR6060	#53, .060 (1.50)	N/A
AR7070	#50, .070 (1.75)	N/A
AR8686	#44, .086 (2.15)	N/A

IP

TI2420A

CBIP

CB

	TI3533a
Mix Chambers AR and AF,	Mix Chambers AR and AF,
2020 and 2929	4242 or larger

AF2020	#76, .020 (0.50)	#53, .060 (1.50)
AF2929	#69, .029 (0.70)	#53, .060 (1.50)
AF4242	#58, .042 (1.00)	N/A
AF5252	#55, .052 (1.30)	N/A

6. Push mix chamber back in position.

7. Attach Front End, page 28.

8. Attach fluid manifold. Connect air. Return gun to service.

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