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.

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Graco M34xxx, M18xxx, M04xxx, M02xxx, M12xxx, M07xxx Reassemble the Air Valve, Air valve u-cup installation