300FWF996 Page 22
NOTICE
While the stay rods are available to
inspect, check loose stay rods and
cracked threads in all stay rods. The
connection between the power end
and the fluid end is a critical one.
To reinstall the fluid end proceed as follows:
1.
Check all twenty stay rods for thread
damage or cracks. If replacement is
required, refer to TORQUES on page
36. This connection is critical.
2.
Thoroughly clean the ends of the stay
rods. Grease or never-seize the
threads.
3.
Position the fluid end on the stay rods
and slide the fluid end onto the stay
rods until it bottoms out on the stay rod
shoulders.
4.
Install the two outer-most heavy hex
nuts and hand tighten. Now it is safe
to remove the lift and sling. Screw all
heavy hex nuts in hand tight.
5.
Using a hydraulic tensioning tool or
torque wrench, torque all hex nuts to
the Torque Requirements shown on
page 36, using the sequence illustrated
in FIGURE 4-1. These nuts MUST be
kept tight. Under torqued nuts will lead
to thread fatigue failure of the stay rods.
6.
Reinstall the plunger clamps, piping
connections and auxiliary equipment.
FIGURE 4-1 GD-2500Q Fluid End
Tightening Sequence
Plunger and Packing Replacement
This service procedure can be performed
with the fluid cylinder in place on the pump,
and consists of the following steps:
1.
Remove the suction cover retainer nut
with the appropriate male hex wrench.
2.
Remove the suction cover with a
threaded "slide hammer type" puller. If
necessary, also remove the suction
valve spring retainer.
3.
Remove any covers over the top of the
plungers to get access to the plunger
clamp / extension rod area.
4.
Remove both cap screws holding the
plunger clamp, then remove the clamp.
5.
Loosen the packing nut to free the
plunger from packing pre-load.
6.
Remove the plunger through the
suction cover opening.
7.
Remove the packing nut, lantern gland,
packing, header ring and spacer.
8.
Inspect the plunger, lantern gland,
packing, header ring and spacer for
excessive wear, nicks, burrs, or any
other defects. Replace expendable
parts as necessary.
9.
Clean and oil the packing bore in the
stuffing box.
10. Install the spacer, header ring, packing
rings (2) and the lantern gland in the
stuffing box with the packing lips
toward the front of the fluid end. See
FIGURE 4-2.
FIGURE 4-2 Typical Packing Assembly
HALLIBURTON EXHIBIT 1013, Page 28
