Graco M34xxx, M18xxx, M04xxx, M02xxx, M12xxx Reassemble the Air Valve, Air valve u-cup installation

Repair

Reassemble the Air Valve

1.Lubricate detent cam (104◆) and install into hous- ing.

2.Lubricate the u-cups (108†◆) and install on the pis- ton (102◆) with lips facing toward the center of the piston.

108†◆ Lips face down

102◆

108†◆ Lips face up

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FIG. 7: Air valve u-cup installation

3.Lubricate both ends of the piston (102◆) and install it in the housing.

4.Lubricate and install the detent assembly (103◆) into the piston.

5.Standard models (No DataTrak or DataTrak with cycle count only): Lubricate new o-rings (106†✠◆) and install on the end caps (107✠). Install the end caps into the housing.

DataTrak models with runaway protection sole- noid: Lubricate and install new o-ring (106†✠◆) on bottom end cap (107✠). Lubricate and install new o-ring (119†✠◆) and runaway reset button (118) on top end cap (117✠). Install the end caps (107✠, 117✠) into the housing.

6.Install a snap ring (110◆✠) on each end to hold end caps in place.

7.Install the spring (111◆).

8.M02xxx and M04xxx Motors: Lubricate and install the air valve cup (112◆). Align the small round mag- net with the air inlet.

112◆

Magnet

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FIG. 8: Cup installation

M07xxx, M12xxx, and M18xxx Motors: Lubricate and install the cup o-ring (◆112b) on the cup body (◆112a), then assemble the cup body to the cup base (◆112c). Lubricate and install the cup assem- bly. Align the small round magnet with the air inlet.

◆112a

◆112b

◆112c

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FIG. 9: Two-piece cup installation

9.Install the valve plate (105◆). Tighten the screws (109†◆) to hold it in place.

12 312796R