Repair
8311827G
Reassembly
1. If it was necessary to remove the piston ball guide
(9) from the displacement rod (1), clean the threads
of the rod and ball guide. Screw the ball housing
onto the rod, handtight. Place the flats of the ball
guide in a vise and torque as noted in FIG. 4.
2. See FIG. 4. Install the piston packings on the piston
(15) in the correct order for your lower, see Repair
Kits, pages 14-17. Install the v-packings (P) one at
a time with the lips facing up.
3. See FIG. 2. Place the flats of the piston (15) in a
vise. Place the ball (10*) on the piston seat (E).
Screw the piston ball guide (9) onto the piston hand
tight, then torque as noted.
4. See FIG. 4. Lubricate the throat packings (T). Install
the throat packings in the outlet housing (7) in the
correct order for your lower, see Repair Kits, pages
14-17. Install the v-packings (T) one at a time with
the lips facing down.
5. Lubricate the threads of the packing nut (2), and
loosely install it in the outlet housing (7).
6. Lubricate the piston packings (P). Slide the dis-
placement rod (1) and piston assembly down into
the cylinder (8). The cylinder is symmetrical, so
either end may face up. Use a rubber mallet to drive
the rod into the cylinder, until the piston (15) is near
the bottom of the cylinder.
7. Install the seal (24*) on the top of the cylinder (8).
Lubricate the seal and the top threads of the cylin-
der.
8. Place the outlet housing (7) in a vise, see FIG. 1.
Slide the rod (1) into the housing, then screw the
cylinder (8) into the housing handtight. The threads
will engage easily until the seal (24*) contacts the
sealing surface of the outlet housing. The top of the
rod will protrude from the packing nut (2).
9. See FIG. 4. Install the seal (24*) on the bottom of the
cylinder (8). Lubricate the seal and the threads of
the cylinder. With the beveled ball stop surfaces
(S) facing down, screw the intake housing (16)
onto the cylinder handtight. The threads will engage
easily until the seal (24*) contacts the sealing sur-
face of the intake housing.
10. See FIG. 3. Install the seal (30*) on the intake valve
(18). Lubricate the seal and the threads of the intake
valve. Place the intake ball (17*) in the intake hous-
ing (16), then screw the intake valve (18) into the
intake housing handtight. The threads will engage
easily until the seal (30*) contacts the sealing sur-
face of the intake housing.
11. Torque the intake housing (16) as noted in FIG. 4.
This will torque both cylinder joints A and B.
12. Torque the intake valve (18) as noted in FIG. 4.
13. Torque the packing nut (2) as noted in FIG. 4.
14. Reconnect the lower to the motor as explained in
your separate pump assembly manual.
To convert the lower to a different packing material,
see Repair Kits, pages 14-17.
To convert the lower to a different packing material,
see Repair Kits, pages 14-17.
CAUTION
To reduce the possibility of costly damage to the rod
(1) and cylinder (8), always use a rubber mallet to
drive the rod into the cylinder. Never use a hammer to
drive the rod.
FIG. 3
16
18
1
2
17*
30*
Orient so the end with the ball cavity (S, see FIG. 4)
faces the ball (17*).
Lubricate.
1
22
4493a
