Graco Husky 3300 - Page 11

Repair
3A0411A 11
Reassemble the Air Valve
NOTE: Apply lithium-based grease whenever instructed
to grease. Order Graco PN 111920.
1. Use all parts in the repair kits. Clean other parts and
inspect for damage. Replace as needed.
2. Grease the detent cam (204◆) and install into hous-
ing (201).
3. Grease the u-cups (208◆†) and install on the piston
with lips facing toward the center of the piston.
4. Grease both ends of the piston (202◆) and the
housing bore. Install the piston in the housing (201),
with the flat side toward the cup (213◆). Be careful
not to tear u-cups (208◆†) when sliding piston into
housing.
5. Grease new o-rings (206◆†✠) and install on the end
caps (207✠). Install the end caps into the housing.
6. Install a retaining ring (210✠) on each end to hold
end caps in place.
7. Grease and install the detent assembly (203◆) into
the piston. Grease and install the o-ring (214◆) on
the cup (213◆), then install the cup (213◆) on the
base (212◆). Install the spring (211◆) onto protru-
sion on cup. Install the cup assembly. Align the
small round magnet in the base with the air inlet.
8. Grease the cup side and install the valve plate
(205◆). Align the small hole in the plate with the air
inlet. Tighten the screws (209◆†) to hold it in place.
F
IG. 1. Air valve u-cup installation
Lips face down
Lips face up
208◆†
208◆†
202◆
ti12754a
FIG. 2. Air valve assembly
210✠
210✠
207✠
206◆†✠
206◆†✠
208◆†
202◆
209◆†
205◆
212◆
◆ 211
203 ◆
204◆
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201
Apply lithium-based grease.
1
1
1
1
1
1
U-cup lips must face piston.
2
2
207✠
1
1
214◆
213◆
1
Apply lithium-based grease to contact surface.
3
3
3