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

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 13