Graco Inc 312900C, 247936, 247937 Repair Fluid Adjustment Valve, Repair Air Valve

Gun Repair

Repair Fluid Adjustment Valve

1.Prepare the gun for repair, page 27.

2.Remove the fluid adjustment valve (25). It can only be replaced as a complete assembly. See FIG. 20..

3.Screw the valve (25) into the gun handle. Torque to 15-25 in-lb (1.7-2.8 N•m).

25

ti11931

Fig. 20. Fluid Adjustment Valve

Repair Air Valve

1.Prepare the gun for service, page 27.

2.Remove the barrel, page 31.

3.Remove the fluid adjustment valve (25) from the handle (17). Remove the spring (15). See FIG. 21.

NOTICE

Clean all parts in non-conductive solvent compati- ble with the fluid being used, such as xylol or min- eral spirits. Use of conductive solvents can cause the gun to malfunction.

4.Remove the air valve (21) with a pliers. Inspect the rubber sealing surface and replace the air valve if damaged.

NOTICE

When removing the air valve (21) be careful not to damage the seat area.The rubber seal is not removable.

5.Inspect the u-cup (6*). Do not remove the u-cup unless damaged. If removed, install the new one with its lips facing into the gun handle (17).

6.Install the air valve (21) and spring (15) into the gun handle (17).

7.Install the fluid adjustment valve (25). Torque to 15-25 in-lb (1.7-2.8 N•m).

8.Install the barrel, page 31.

25

21 15

17

*6

ti12717

Fig. 21. Air Valve

34 312900C