Graco 406828B User Manual download pdf (Page 2)

2 406828B

Assembly

NOTE: Apply lithium-based grease whenever instructed

to grease.

1. Use all parts in the repair kits, as applicable to your

pump. Clean other parts and inspect for damage.

Replace as needed.

2. Grease the detent cam (204) and install into

housing.

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 install it in

the housing, with the flat side toward the cup (213).

Be careful not to tear u-cups (208) when sliding pis-

ton into housing.

5. Grease new o-rings (206) and install on the end

caps. Install the end caps into the housing.

6. Install a retaining ring on each end to hold end caps

in place.

7. Grease and install the detent assembly (203) into

the piston. Install the o-ring (214) on the cup (213).

Apply a light film of grease to the outside surface of

the o-ring and the inside mating surface of the base

(212). Install the cup (213) on the base (212). Install

the spring (211) onto protrusion on the 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.

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Graco 406828B User Manual Page 2