Graco 310692C manual Replacing the fluid valve packings

Replacing the fluid valve packings

1.Remove the fluid adjustment knob (21) and fluid spring (23).

2.Pull the fluid needle (13) out the back of the gun.

16 26 13 21

23 22 37 20 19

ti4850a

FIG. 33

3.Remove the fluid valve nut (19), air valve spring (22), and air valve assembly (26). Discard the air valve assembly. Using a mechanical pick, remove the u-cup packing (16) from the gun body.

Service

4.Place the new u-cup packing (16) on the packing installation tool (29), with the u-cup lips facing the tool as shown.

16

29

ti4851a

FIG. 34

5.Push the packing (16) into the back of the gun until a definite snap is felt.

6.Using a mechanical pick, remove the u-cup packing (20) and spacer (37) from the fluid valve nut (19). Be careful not to damage the seal surface or the nut's internal threads.

7.Using the packing installation tool (29), install the new u-cup packings (20) into the fluid valve nut (19). The u-cup lips must face toward the tool as shown. This will help apply even pressure to the u-cup lips and avoid damaging them.

19

20

ti4852a

FIG. 35

8.Push the u-cup packings (20) into the fluid valve nut (19) until a definite snap is felt.

22 310692C