3-1-618 Page 22
NOTICE
The
procedure
for
fluid
end
installation is presented separately
due to the special and critical nature
of the connection between the power
end and the fluid end.
To reinstall the fluid end proceed as follows:
1.
Check all eight tie rods for thread
damage. If replacement is required,
refer to “Crosshead Guide and Tie
Rods,” page 25.
2. Remove tie rod sleeves and thoroughly
clean tie rods. Grease and reinstall
sleeves.
3.
Position the fluid end on the tie rods
and slide the fluid end onto tie rods
until it bottoms on tie bolt sleeves.
4.
Lubricate the tie rod threads and the
threads and splines of the HYTORC
inner and outer sleeve and washer with
Dow-Corning
1000
anti-seize
or
equivalent. Install HYTORC nuts on tie
rods by hand.
5.
Using the HYTORC T-240K tensioning
tool and the torquing sequence in Fig.
4-1, torque all eight nuts with a
pressure setting of 1500 psi. Repeat
this procedure using 3400 psi for a final
torque of 7000 ft-lbs. on each nut.
6.
Reinstall the plunger clamps, piping
connections and auxiliary equipment.
FIGURE 4-1 Tightening Sequence for Fluid
End Nuts
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.
Open the hinged cover on the top of
the crosshead housing to get access to
the plunger/extension rod area.
4.
Remove both cap screws holding the
extension rod clamp, then remove the
clamp.
5.
Loosen the packing nut to free the
plunger from packing pressure.
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
