Repair

4.For motors with DataTrak: If equipped with a run- away protection solenoid, remove two screws (18) and the solenoid bracket (26). Pull the solenoid (25) out of the air valve.

26

Use a

10 mm hex

25

ti12728a

FIG. 4: Solenoid removal

5.Remove screws (18). Remove the air valve (17) and gasket (16*).

6.To repair the air valve, go to Disassemble the Air Valve, step 1 at right. To install a replacement air valve, continue with step 7.

7.Align the new air valve gasket (16*) on the mani- fold, then attach the air valve (17).

8.For motors with DataTrak: If equipped with a run- away protection solenoid, remember to reattach the solenoid bracket and the solenoid.

9.For motors with DataTrak: Use screw to attach the reed switch assembly to the new air valve. Be sure the sensor cables are connected properly (see pump or package manual).

10.Reconnect the air line to the motor.

Replace Seals or Rebuild Air Valve

Air Valve Seal Kits are available. See page 21 to order the correct kit for your pump. Parts are marked †.

Air Valve Repair Kits are available. See page 21 to order the correct kit for your pump. Parts are marked .

Air Valve End Cap Kits are available. See page 21 to order the correct kit for your pump. Parts are marked .

Disassemble the Air Valve

1.Perform steps 1-5 under Replace Complete Air Valve, page 9.

2.See FIG. 5. Use a 2 mm or 5/64 hex key to remove two screws (109†). Remove the valve plate (105).

3.M02xxx and M04xxx Motors: Remove the cup (112) and spring (111).

M07xxx, M12xxx, and M18xxx Motors: Remove the two-piece cup assembly (112a, b, and c), and spring (111).

111

112

112a

112b

112c ti12751a

105109†

FIG. 5: Air plate removal

4.Remove the snap ring (110◆✠) from each end. Use the piston to push the end caps (107, 117) out of the ends. Remove end cap o-rings (106†✠◆, 119†✠◆).

5.Remove the piston (102). Remove the u-cup seals (108†) from each end and the detent assembly (103) and detent cam (104) from the center.

10

312796R

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Graco M12xxx, M34xxx, M18xxx, M04xxx, M02xxx, M07xxx Replace Seals or Rebuild Air Valve, Disassemble the Air Valve