Graco LubePro A4000 Instructions Manual page 23

5. Remove the piston (302◆). Remove the u-cup seals
(308†◆) from each end and the detent assembly
(303◆) and detent cam (304◆) from the center.
◆❊310
1
1
1
◆303
1
◆312
†◆309
◆305
1
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3A5266G
†❊◆306
❊307
301
◆304
◆311
†◆308
1
1
◆302
†◆308
1
❊307
†❊◆306
◆❊310
Reassemble the Air Valve (F
1. Lubricate the detent cam (304◆) and install into the
housing.
2. Lubricate the u-cups (308†◆) and install on the pis-
ton (302◆) with the lips facing toward the center of
the piston.
Lips face down
Lips face up
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3. Lubricate both ends of the piston (302◆) and install
it in the housing.
4. Lubricate and install the detent assembly (303◆)
into the piston.
5. Lubricate new o-rings (306†◆❊) and install on the
end caps (307❊). Install the end caps into the hous-
ing.
6. Install a snap ring (310◆❊) on each end to hold end
caps in place.
ti16213
7. Install the spring (311◆). Lubricate and install the
air valve cup (312◆). Align the small round magnet
with the air inlet.
8. Install the valve plate (305◆). Tighten the screws
(309†◆) to hold it in place.
◆312
Magnet
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†◆308
◆302
†◆308
Parts: Oil Models
. 28)
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