Gardner Denver C2500Q QUINTUPLEX, Operating And Service Manual

Page: 27 / 46

Page 21
NOTICE
While the stay-rod are available to
inspection, 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
34. 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 1-3/4” Hvy.
Hex. Nuts and hand tighten. Now it is
safe to remove the lift and sling.
Screw all Hvy. 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 34, using a “Cylinder-Head”
sequence. 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 C-2500 Fluid End
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.
3.
Remove any covers on top of the
plunger-clamp area to get access to
the plunger/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 Packing Assembly