Graco Inc 288046, 311052E, 288217, G40 important safety instructions TI8173b

Service

10.If gasket (15) needs to be replaced, unscrew the two screws (18) and separate the fluid housing (2) and piston housing (1). Inspect gasket (16) and replace if needed.

Gasket (16) is attached to assembly with adhesive; therefore, if you are replacing gasket (16), ensure that a replacement gasket is available.

18

2

18

1

TI8173b

FIG. 16

11.Remove the large o-ring (22) from the piston and the smaller o-ring (23) from the piston shaft. Remove the two o-rings (25, 26) from each of the piston stems. Check that the stems are solidly in place. If they are loose, replace the entire piston assembly (20).

12.Perform the following applicable step:

a.Non-circulating guns: Remove the fluid outlet port plug (5) and gasket (4) from the fluid hous- ing (2). Remove the o-ring (6) and backup o-ring

(7) from the plug.

b.Circulating guns: Remove the gasket (4) from the fluid housing (2).

13.Clean all parts and replace any worn parts. When assembling, lubricate the threads with anti-seize lubricant.

311052E 21