20 308149
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.
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
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).
Fig. 9
1
2
01173
5
8
13 mm (1/2 in.) Diameter Brass Rod.
When reassembling items 5 and 8, ap-
ply thread sealant and torque to approx.
125–137 N.m (92–101 ft–lb).
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.
