Repair
4
311391F
4. Remove the four screws (225) joining the upper
(237) and lower (236) pump bases. Remove the
upper base and two o-rings (207, 213).
5. Remove the inlet valve assembly from the lower
pump base:
a. Remove the ball stop (232) and spring (228)
from the cavity.
b. Remove the inlet valve ball (211), using a mag-
net.
c. Using the 5/8 hex of the ball seat removal tool
(Part No. 296608), loosen and remove the inlet
ball seat (216) by turning it counterclockwise.
d. Remove the valve seat seal (217) from the bot-
tom of the cavity.
e. Thoroughly clean all metal parts in a compatible
solvent and inspect for wear or damage. Inspect
each ball and seat for nicks or scratches;
replace as required.
f. Inspect all seals and o-rings and replace as
required.
Pump Base Reassembly
1. Install the inlet valve in the lower pump base:
a. Apply Blue Loctite
®
242 to the threads of the
inlet ball seat (216). See the parts drawing on
page 6.
b. Install the inlet seal (217) and seat (216) by
threading the seat (216) into the lower base
(236) by hand, until the seal bottoms in the
base. Using a torque wrench on the ball seat
removal tool, tighten the seat to 100 ft-lb (135
N•m).
c. Install the valve ball (211), spring (228), and ball
stop (232) in the cavity.
2. Install the two o-rings (207, 213) into the grooves on
the top of the lower pump base (236). Then install
and tighten the upper pump base (237) to the lower
base, using the four screws (225).
3. Install the outlet valve in the upper pump base
(237):
a. Coat the threads of the outlet valve seat (223)
liberally with Lubriplate grease.
b. Install the outlet seal (224) and seat (223) by
threading the seat (223) into the upper base
(237) by hand, until the seal bottoms in the
base. Use a 6 in. adjustable wrench on the ball
seat removal tool to snug the seat approxi-
mately 1/4 turn.
Do not overtighten.
It may be
necessary to periodically retighten the seat
throughout the life of the seat seal.
c. Install the valve ball (205) into the cavity.
d. Install the o-ring (207) on the outlet valve
retainer (222). Install and tighten the retainer.
