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18 308200
Service
5. Lubricate the o-rings (10*) and install them on the
cylinder (11). Apply thread lubricant to the top
threads of the cylinder. Using a 24 in. adjustable
wrench on the flats of the cylinder, screw it into the
outlet housing (9). Torque to 159–221 N.m
(117–163 ft-lb).
6. Lubricate the throat packings and glands, and
install them in the outlet housing (9) one at a time
in the following order, with the lips of the v-pack-
ings facing down: male gland (6n), UHMWPE
v-packing (5n), PTFE v-packing (3n), UHMWPE
(5n), PTFE (3n), UHMWPE (5n), and female
gland (4n). Apply thread lubricant to the packing
nut (2) and install it loosely in the outlet housing.
7. Carefully insert the displacement rod (1) into the
bottom of the cylinder (11). Push the rod up into
the cylinder and through the outlet housing (9),
until it protrudes from the packing nut (2). Be
careful not to damage the piston seal (14*) while
performing this step.
8. Apply thread lubricant to the bottom threads of the
cylinder (11). Be sure the o-ring (10*) is in place on
the cylinder. Guide the intake valve housing (16)
up onto the priming piston rod (21). Screw the
valve housing onto the cylinder, using a 24 in.
adjustable wrench. Torque to 159–221 N.m
(117–163 ft-lb).
9. If the rod guide (17) was removed from the intake
valve housing (16), reinstall it with the open end
facing down toward the pump intake.
10. With the beveled side facing up, press the seal
(30*) into the recess of the intake packing nut (27)
until it snaps into place. The nose of the seal
should be flush with or slightly recessed into the
face of the packing nut. With the threads facing
down toward the pump intake, slide the nut up
onto the priming piston rod (21) until it clears the
flats of the rod.
11. Lubricate a new intake valve seal (26*) and slide it
onto the rod, being careful not to damage the seal
when passing over the flats of the rod. Slide the
seal up until it reaches the packing nut (27). Apply
thread lubricant to the female threads of the intake
valve body (25), and slide it onto the rod until it
reaches the nut (27).
12. Place a 7/8 in. wrench on the hex of the packing
nut (27) and a 25 mm wrench on the flats of the
valve body (25). Screw the nut into the body,
making certain they remain in position above the
flats of the rod (21). Torque to 35–41 N.m (26–30
ft-lb). Slide the assembled intake check valve (U)
up the priming piston rod and into the rod guide
(17) as far as possible; this may be difficult due to
high friction between the seal (26*) and rod (21).
13. Position the intake valve seat (18) so its large
beveled side faces down toward the pump intake.
Slide the seat (18) onto the priming piston rod (21)
and into the intake valve housing (16) until it seats
on the rod guide (17) . Lubricate a new seal (19*)
and push it up into the beveled gap around the
bottom outer edge of the seat (18). Be sure the
seal is fully and uniformly positioned in the gap.
14. Apply thread lubricant to the threads of the intake
cylinder (20) and screw the cylinder into the intake
valve housing (16), using a 24 in. adjustable
wrench. Torque to 159–221 N.m (117–163 ft-lb).
Installation of the intake cylinder (20) will seat the
parts of the intake valve assembly (U) securely in
the proper position.
15. Slide the priming piston guide (24) onto the rod
(21) until it stops. Then install the priming piston
(23), with the flat side facing up toward the pump.
Apply thread lubricant to the female threads of the
priming piston nut (22). Hold the rod (21) steady
with an 8 mm wrench on the flats, and screw the
priming piston nut (22) onto the rod with a 3/4 in.
wrench. Torque to 35-41 N.m (26-30 ft-lb).
16. Reconnect the displacement pump to the air motor
as explained on page 13.