9. Using a wrench, turn the jam
nut counterclockwise to loosen
it from the pump housing.
10. Turn the fluid section
counterclockwise to remove it
from the pump housing.
11. Place the fluid section cylinder
upright in a vise by clamping
on the wrench flats.
12. Loosen and remove the inlet
valve housing from the
cylinder.
13. Remove the inlet cage, inlet
valve ball, inlet valve seat, and
o-ring from the inlet valve.
14. Clean out any debris in the inlet valve housing and
examine the housing and the inlet valve seat. If the seat
is damaged, reverse to the unused side or replace the
seat.
15. Using a wrench, remove the upper seal retainer.
16. Slide the piston rod out through the bottom of the cylinder.
17. Inspect the piston rod for wear
and replace if necessary.
18. Remove the adapter ring and
upper packing assembly from
the top of the cylinder.
19. Remove the seal washer, lower
support ring and lower packing
assembly from the bottom of
the cylinder.
20. Remove the cylinder from the
vise.
21. Insert the connection pin
through the hole at the top of
the piston rod and clamp each
end of the connecting pin in the
vise. This will hold the piston
rod in position for disassembly.
22. Using a 3/8” hex wrench, loosen
and remove the outlet valve
retainer from the piston rod.
23. Remove the outlet valve seal,
outlet cage, outlet valve ball,
nylon washer, and outlet valve
seat from the outlet valve
retainer.
24. Clean out any debris and
examine the retainer and outlet
valve seat. If the seat is
damaged, reverse to the unused
side or replace the seat.
25. Clean and inspect the outlet cage and outlet valve ball.
Replace if they are worn or damaged.
NOTE: Do not clamp the
piston rod directly in
the vise. Damage to
the piston rod will
occur.
NOTE: Be careful not to
scratch, score, or
otherwise damage the
cylinder during
removal of the packing
assemblies.
Piston Rod
Cylinder
Upper
Seal
Retainer
Adapter
Ring
Seal
Washer
Upper
Packing
Assembly
Lower
Packing
Assembly
Outlet Valve
Seat
Nylon Washer
Outlet Cage
Outlet Valve
Ball
Outlet Valve
Seal
Outlet Valve
Retainer
Lower
Support
Ring
NOTE: Do not over-tighten
the vise. Damage to
the cylinder may
occur.
Inlet Valve
Housing
Viton
O-Ring
O-ring
PTFE
Back-Up
Ring
Inlet Valve
Seat
Inlet Valve
Ball
Inlet Cage
Cylinder
26. Reassemble the outlet valve assembly into the piston rod
in the reverse order of how it was disassembled. Use the
new parts supplied with the packing kit during reassembly.
Apply blue Loctite #242 to the threads of the outlet valve
retainer. Torque the outlet valve retainer to 144 in./lbs.
27. Remove the piston rod from the vise.
28. Clean the cylinder. Inspect the cylinder for damage and
replace if necessary.
29. Place the cylinder upright in a vise by clamping on the
wrench flats.
30. Locate the new upper and lower packing assemblies and
pack the areas between the packing lips with grease.
Lubricate the o-rings on the exterior of the packings with
grease.
31. Insert the upper packing
assembly into the top of the
cylinder with the large beveled
edge facing down.
32. Insert the new adapter ring into
the top of the cylinder with the
small, center protrusion facing
down. The adapter ring should
rest on the upper packing
assembly.
33. Apply blue Loctite #242 to the threads of the upper seal
retainer. Thread the upper seal retainer into the cylinder
but do not tighten.
34. Rotate the cylinder in the vise so that the bottom end is
facing up.
35. Pre-form the lower packing using the lower packing sizing
tool (included in the repacking kit).
36. Insert the lower packing
assembly partially into the
bottom of the cylinder with the
large beveled edge facing
toward the cylinder (beveled
edge will be facing up when the
cylinder is upright).
37. Push the lower packing
assembly into position using the
lower packing insertion tool (see Fluid Section Assembly
parts list for lower packing insertion tool P/N).
38. Place the piston insertion tool (included in the repacking
kit) over the top of the piston rod.
39. Insert the piston rod into the bottom of the cylinder,
through the lower packing assembly, through the upper
packing assembly, and out through the upper seal
retainer.
40. Tighten the upper seal retainer. Torque to 450–480 in./lbs.
41. Apply blue Loctite to the bottom 3–4 threads on the
cylinder. Turn the jam nut clockwise until it is flush against
the top of the cylinder.
42. Lubricate the first several threads at the top of the cylinder
with anti-seize compound. Remove the cylinder from vise.
43. Thread the cylinder into the pump housing, turning
clockwise. When the connecting pin hole on the piston
rod lines up with the hole in the slider assembly, insert the
connecting pin.
44. Slide the retaining ring down on the slider assembly to
cover the connecting pin.
NOTE: When repacking the fluid section, make sure the
raised lip on the bottom of the lower packing
assembly is fully outside the packing around the
piston rod after insertion of the piston rod.
Install lower packing so
large beveled edge will
be facing up when the
cylinder is upright.
Large Beveled Edge
Install upper packing
with large beveled
edge facing down.
Large Beveled Edge
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