Graco ProMix PD2K Repair Parts Manual page 51

Replacing the Solvent Flow Switch
1. Follow the steps in Before Servicing, page 36.
2. Remove the screws (56) holding the cover (8)
to the front of the unit.
3. Disconnect the solvent flow switch wires
from J6 pins 11–12 on the EFCM. See
Electrical Schematics, page 29.
4. Disconnect the solvent lines.
5. Unscrew the adapter (45) from the solvent flow
switch (19).
6. Unscrew the solvent flow switch from the elbow
(18).
7. Remove the solvent flow switch (159).
8. Screw the new solvent flow switch onto the elbow
(18).
9. Screw the adapter (45) into the solvent flow
switch (19).
10. Connect the wires to J6 pins 11–12. Reconnect
the solvent lines.
11. Install the cover (8) to the front of the unit with
the screws (56).
12. Open the main air shutoff valve on the air supply
line.
13. Restore power to the unit. Turn on the power
switch (P) at the electrical control box.
3A2800B
Replacing the Solvent Valve
1. Follow the steps in Before Servicing, page 36.
2. Disconnect the air lines from the solvent valve
(25).
3. Disconnect the solvent inlet and outlet lines.
4. Unscrew the solvent valve (25) from the adapter
(21).
5. Remove the seat (23) and o-rings (22, 24).
6. See manual 312782 to repair the valve.
7. Reassemble in the reverse order.
Figure 39 Solvent Valve and Solvent Flow Switch
Repair
51