Graco 308149P important safety instructions Service

Service

10.Pull the seal (39) and seat (11) out the top of the intake housing (17). See Fig. 10. If the seat is difficult to remove, turn the housing upside down and drive the seat out using a hammer and brass rod.

11.Examine the mating surfaces of the seat (11) and the intake valve body (10) for damage.

12.Slide the rod guide (18) off the priming piston rod (12). Unscrew the priming piston rod from the piston (6). Run a finger over the surface of the rod to check for scratches or scoring.

5

8

113 mm (1/2 in.) Diameter Brass Rod.

2When reassembling items 5 and 8, ap- ply thread sealant and torque to approx. 125–137 N.m (92–101 ft–lb).

NOTE: Service Tool 109508 is available as an acces- sory. The tool fits over the top of the displacement rod (1), making it easier to apply a 24 inch adjustable

Fig. 9

01173

wrench or 3/4 in. drive socket when disconnecting the rod from the piston (6).

13.Place the flats of the piston (6) in a vise. Unscrew the displacement rod (1) from the piston (6). Lift the piston seat and guide assembly off the piston. Inspect the mating surfaces of the piston (6) and piston seat (8) for damage. See the Detail in Fig. 10.

14.Remove the displacement rod (1) from the vise and inspect it for scratches and scoring by running a finger over the surface.

15.Place the piston seat and guide assembly in the vise and close the jaws on the flats of the seat (8) just tight enough to hold the part. Slide a brass rod through the openings in the piston guide (5) and unscrew it from the seat as shown in Fig. 9. Re- move the piston seal (7).

16.Take the intake valve assembly removed in step 9 and unscrew the packing nut (9) from the valve body (10). Using an o-ring pick, remove the glands (16, 41) and v-packings (40 and 42) from the valve body. Remove the seal (43) from the packing nut. See the Detail in Fig. 10.

NOTE: The seal (43) is press-fit in the packing nut and may require cutting to ease removal.

17.Unscrew the bleeder valve plug (35) completely from the valve housing (34). Clean the valve threads and the bleed hole in the valve housing. It is not necessary to remove the valve housing from the outlet housing (19).

18.Remove the packing nut (2) from the outlet hous- ing (19). Remove the throat packings (22, 24) and glands (21, 23) from the outlet housing (19). Do not remove the fluid outlet nipple (20) and o-ring (25) from the outlet housing unless they need replacement.

19.Inspect all parts for damage. Clean all parts and threads with a compatible solvent. Reassemble as explained on page 22.

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