Clean Mix Chamber Nozzle; Clean Passages; Clean Impingement Ports - Graco 309550Y Instructions - Parts Manual

Clean Mix Chamber Nozzle

1.
Engage piston safety lock, page 10.
2.
Refer to T 1. Also see identification chart
ABLE
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
Table 1: Nozzle Drill Bit Sizes
Round Spray
Mix Chamber Drill Size
Part No. in. (mm)
AR2020 #58, .042
(1.00)
AR2929 #55, .052
(1.30)
AR3737 #55, .052
(1.30)
AR4242 #53, .060
(1.50)
AR5252 #50, .070
(1.75)
AR6060 #44, .086
(2.15)
AR7070 3/32, .094
(2.35)
AR8686 #32, 0.116
(2.90)
309550Y
TI2409A
TI2418A
Flat Spray
Mix Chamber Drill Size
Part No. in. (mm)
AF2020 3/32, .094
(2.35)
AF2929 3/32, .094
(2.35)
AF4242 3/32, .094
(2.35)
AF5252 3/32, .094
(2.35)

Clean Passages

If necessary, clean out passages in fluid housing and
handle with drill bits. Refer to T
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
Passage Description
Optional Air Inlet
Purge Air
Piston Air
Air Exhaust
Air Valve Bore
Cleanoff Air
Check Valve Holes
Grease

Clean Impingement Ports

1.
Follow Pressure Relief Procedure, page 15.
2.
Disconnect air (D) and remove fluid manifold (M).
M
3.
Flush Gun, page 20. If gun will not flush, see page
29.
4.
Remove Front End, page 27.
Maintenance
2 and to Cutaway
ABLE
Ref. Letter Diameter,
(page 26) in. (mm)
C 7/16, 1/8
(11.0, 3.1)
D 1/8 (3.1)
E, F 1/8 (3.1)
G 11/32, 1/8
(8.7, 3.1)
H 9/32 (7.1)
Not Shown 3/32 (2.35)
Not Shown 3/32 (2.35)
Not Shown 3/32 (2.35)
D
TI2554A
21