Graco 308652Y important safety instructions Replacing Diaphragms

Service

Replacing Diaphragms

Replace the diaphragms as follows. See Fig. 6 and Fig 7.

1.Relieve the pressure, and disconnect the air line from the pump.

WARNING

To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 8.

5.Remove the diaphragm pins (8), remove and replace the o-rings (9), and reinstall the diaphragm pins in the center housing (1).

6.Reinstall the diaphragm shaft (10).

7.Install the new diaphragms (30) with the concave side toward the center housing (1).

8.Screw the diaphragm plates (50) onto the shaft (10), and torque to 28–33 in-lb (3.2–3.7 NSm).

2.Remove the eight screws (58) that fasten the two fluid covers (51) to manifold (52), and remove the fluid cover/center housing assembly from the manifold.

3.Remove the six screws (58) that fasten each fluid cover (51) to the center housing (1), and pull the fluid covers off of the center housing.

4.Remove the diaphragm plates (50) from the shaft (10), and remove the diaphragms (30), and air- side diaphragm plates (11).

9

8

1

12 13

10

11

57

Fig. 6

9.Reinstall the fluid covers (51) on the center hous- ing (1), install the screws (58) that fasten the fluid covers to the center housing, and torque to 42–47 in-lb (4.7–5.3 NSm). See Torque Sequence on page 18.

10.Reinstall the fluid covers/center housing assembly on the manifold (52), install the screws (58) that fasten the fluid covers/center housing assembly to the manifold, and torque to 42–47 in-lb (4.7–5.3 NSm). See Torque Sequence on page 18.

11.Reconnect the pump.

58

30 50

51

58

06180D

308652 13