Graco M18xxx, M34xxx, M04xxx, M02xxx, M12xxx, M07xxx Disconnect the Air Motor, Coupling nut removal

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Replace Pilot Valves

1.Stop the pump at the middle of its stroke. Relieve the pressure. See page 9.

2.Disconnect the air line to the motor.

3.Remove the tie rod shield (TS). Slide the drip shield (DS) down on the tie rods.

DS

TS

ti12916a

4.Use a 10 mm socket wrench to remove the old pilot valves (19) from the top and bottom covers.

5.Lubricate and install the new pilot valves (19). Torque to 95-105 in-lb (11-12 N•m).

Repair Air Motor

NOTE: Air Motor Seal Kits are available. See page 21 for the correct kit for your motor. Parts included in the kit are marked with an asterisk (*). For best results, use all the parts in the kit.

Disconnect the Air Motor

1.Flush the pump, if possible. (See package manual) Relieve the pressure. (See page 9.)

2.Disconnect the air and fluid hoses, the ground wire, and the tie rod shield.

3.Hold the flats of the air motor piston rod with a wrench. Use another wrench to loosen the coupling nut (CN).

Repair

CN

TN

ti12815a

FIG. 10: Coupling nut removal

4.Remove the tie rod nuts (TN).

5.Use a socket to remove the mounting screws (MS).

MS

ti12818a

FIG. 11: Air motor removal

6.Lift up on the air motor to remove it. The tie rods and drip shield will remain attached.

Cart Mount: Remove the two screws on the arms and tip back or remove the air control panel for eas- ier removal of the air motor.

312796R

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Contents NXT Air Motor Important Safety InstructionsRelated Manuals ContentsFire and Explosion Hazard Pressurized Equipment Hazard Uses a smaller muffler. Limited use ModelsModel M04LT0 shown Component IdentificationM18xxx models have two mufflers C Air regulator Bleed-type master air valveAir filter Problem Cause Solution TroubleshootingReplace Complete Air Valve RepairDisassemble the Air Valve Replace Seals or Rebuild Air ValveAir valve assembly Reassemble the Air Valve Air valve u-cup installationCoupling nut removal Disconnect the Air MotorReassemble the Air Motor Disassemble the Air MotorTie Bolt 13 mmAir Motor Torque Air motor u-cup installationParts Description Qty M02xxx M04xxx M07xxx M12xxx M18xxx M34xxx Air Motor Parts All ModelsSOLENOID/REED Switch Air Valve Parts End Cap Kit Other Air Valve AirValve Description Qty Repair KitKits and Accessories Air Motor Weight Model Inch mm Lb kg M02xxx M04xxx M07xxx DimensionsM02xxx 2.5 M04xxx 3.5 Mounting Hole DiagramsM07xxx 4.5 M18xxx 7.5 in. and M34xxx 7.5 M12xxx 6Technical Data Graco Information Graco Standard Warranty