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

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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

ti12754a

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

ti12752a

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

ti12752b

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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312796R

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Contents Important Safety Instructions NXT Air MotorContents Related ManualsFire and Explosion Hazard Pressurized Equipment Hazard Models Uses a smaller muffler. Limited useComponent Identification Model M04LT0 shownM18xxx models have two mufflers C Bleed-type master air valve Air regulatorAir filter Troubleshooting Problem Cause SolutionRepair Replace Complete Air ValveReplace Seals or Rebuild Air Valve Disassemble the Air ValveAir valve assembly Air valve u-cup installation Reassemble the Air ValveDisconnect the Air Motor Coupling nut removalDisassemble the Air Motor Reassemble the Air MotorTie Bolt 13 mmAir motor u-cup installation Air Motor TorqueParts Air Motor Parts All Models Description Qty M02xxx M04xxx M07xxx M12xxx M18xxx M34xxxSOLENOID/REED Switch Air Valve Parts Air Valve AirValve Description Qty Repair Kit End Cap Kit OtherKits and Accessories Dimensions Air Motor Weight Model Inch mm Lb kg M02xxx M04xxx M07xxxMounting Hole Diagrams M02xxx 2.5 M04xxx 3.5M07xxx 4.5 M12xxx 6 M18xxx 7.5 in. and M34xxx 7.5Technical Data Graco Standard Warranty Graco Information