Graco 312781E Repair the Valves and Seats ProMix 2KS and ProMix 3KS only, Dispense Valve Cap

Repair the Valves and Seats (ProMix 2KS and ProMix 3KS only)

Valve Seat Kit 24A861 is available. See page 15. Parts included in the kit are marked with a symbol, for exam- ple (16‡). For best results, use all parts included in the kit.

See the Parts drawings on pages 14 and 16. Clean and inspect all parts. Apply pipe sealant to all pipe threads when reassembling.

1.Relieve pressure.

2.Disconnect the fluid line from the valve adapter (17).

3.Disconnect the air lines from the valve (19).

4.Unscrew the cap (C) to remove spring pressure on the valve. See FIG. 5.

NOTE: Another method of removing spring pres- sure is by applying air to the ON port, to lift the valve needle off the seat.

C

ON Port

TI11581a

FIG. 5. Dispense Valve Cap

Repair

5.Remove the screws (20). Lift the adapter (17) and valve (19) off the shutoff valve manifold (11 or 36).

6.Remove the seat (16) and o-rings (15).

7.Unscrew the valve (19) from the adapter (17). Remove the o-ring (18).

NOTE: See manual 312782 to repair the valve (19).

8.Install the new seat (16‡) and o-rings (15‡).

9.Reinstall the adapter (17) and screws (20).

10.Before performing step 11, install the new o-ring (18*) and screw the valve (19) securely into the adapter (17).

11.Install the spring and valve cap (C). See manual 312782 to adjust the spring tension and needle travel.

12.Reconnect the fluid and air lines.

312781E 11