Replace Seals Or Rebuild Air Valve - Graco Husky 1050HP Repair Parts

Repair

Replace Seals or Rebuild Air Valve

Follow these instructions to service the air valve with
one of the available repair kits. Air Valve Seal Kit
parts are marked with a †. Air Valve Repair Kit parts
are marked with a ♦. Air Valve End Cap Kit parts
are marked with a ‡. Kit 24W952 also is available to
replace the 6 o-rings between the air valve and the
High/Low manifold.
Disassemble the Air Valve
1. Perform steps 1-3 under
Replace Complete Air Valve, page
2. Use a T8 Torx screwdriver to remove two
screws (309). Remove the valve plate (305), cup
assembly (312-314), spring (311), and detent
assembly (303).
3. Pull the cup (313) off of the base (312). Remove
the o-ring (314) from the cup.
4. Remove the retaining ring (310) from each end
of the air valve. Use the piston (302) to push
the end cap (307) out of one end. Remove the
u-cup seal (308) from the piston. Pull the piston
out of the end and remove the other u-cup seal
(308). Remove the other end cap (307) and the
end cap o-rings (306).
5. Remove the detent cam (304) from the air valve
housing (301).
Reassemble the Air Valve
NOTE: Apply lithium-based grease when instructed
to grease. Order Graco PN 111920.
12
Springer Pumps, LLC
Telford, PA 18969
1. Use all parts in the repair kits. Clean other parts
2. Grease the detent cam (304♦) and install into
3. Grease the u-cups (308♦†) and install on the
10.
4. Grease both ends of the piston (302♦) and the
5. Grease new o-rings (306♦†‡) and install on the
6. Install a retaining ring (310‡) on each end to hold
Tel: 866-777-6060 / Int'l: 215-949-2900
Fax: 866-777-6383 / Int'l: 215-721-1296
and inspect for damage. Replace as needed.
housing (301).
piston with lips facing toward the center of the
piston.
Lips face
down.
Lips face
up.
housing bore. Install the piston in the housing
(301), with the flat side toward the cup (313♦).
Be careful not to tear u-cups (308♦†) when
sliding piston into housing.
end caps (307‡). Install the end caps into the
housing.
end caps in place.
334390B
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