3-1-618 Page 23
11. Install and hand tighten the packing nut
to align the packing in the bore.
12. Loosen the packing nut to allow for
installation of the plunger.
13. Insert the plunger through the suction
cover hole into the packing. It may be
necessary to bump the plunger through
the packing with a slide hammer.
14. Tighten the packing nut.
15. Inspect the clamp surfaces, plungers,
and extension rods for cleanliness.
16. Install the clamp and tighten the clamp
screws with 58 ft-lbs. torque.
17. Tighten the packing nut again.
18. Replace the seals on the suction cover.
19. Install the suction cover and tighten the
suction cover retainer nut.
20. Make sure that the plunger lube line is
in place before restarting the pump.
Stuffing Box Replacement
This procedure is to be performed if it is
determined that the plunger size must be
changed to meet job performance
requirements.
1.
Follow steps 1 through 8 of the
“Plunger and Packing Replacement”
section on page 22.
2.
Loosen and remove the plunger
lubrication lines from the stuffing box.
3.
Support the stuffing box using a nylon
sling attached to a hoist. (The sling
should be loose, to prevent twisting,
while loosening the stuffing box.)
4.
Loosen the stuffing box using the
stuffing box wrench.
5.
Carefully remove the stuffing box from
the cradle area.
6.
Clean and oil the packing bore in the
stuffing box.
7.
Install the stuffing box seal, lubricating
with a light coat of grease.
8.
Lubricate the stuffing box threads with
Dow-Corning 1000 anti-seize or
equivalent.
9.
Install sling on stuffing box and position
to install in the fluid end.
10. Install and tighten the stuffing box in
the fluid end. (Note: The stuffing box
will “bottom out” in the fluid end bore
when tightened properly.)
11. Complete installation by following steps
10 through 20 of the “Plunger and
Packing Replacement” section on page
22.
12. Repeat this procedure for each
cylinder.
Valve and Seat Replacement
This procedure may be performed with the
fluid end on the pump.
WARNING
Never try to remove or cut a valve
seat with a torch. Severe damage to
the fluid end may occur.
Before starting, make sure that special tools
required for this procedure are available.
For part numbers of the tools see the Parts
Manual.
1.
Remove the discharge cover retainer
nut with a 2” hex wrench.
2.
Remove the discharge cover with a
threaded “slide hammer” type puller.
3.
Remove the suction cover retainer nut
with a 2" hex wrench.
4.
Remove the suction cover with a "slide
hammer
type"
puller.
