3-1-618 Page 24
5.
Remove the suction valve spring
retainer, suction valve and valve
spring.
6.
Remove the suction valve seat or
discharge valve seat with a seat puller
and a seat puller jack. These tools are
available from Gardner Denver.
7.
Clean the valve seat deck thoroughly.
8.
Be sure the O-ring is installed on the
seat and snap the valve seat into the
taper by hand to fit tightly.
9.
Place the winged valve on the top of
the valve seat.
10. Bump the seat into the taper 2-3 times
with a heavy bar to make the fit tight.
11. Reinstall the valve spring retainer and
suction valve spring.
12. Install new seals on the cover and
reinstall the suction valve cover and
retainer nut.
13. Install new seals on the discharge
cover and reinstall the discharge valve,
spring, cover and retainer nut.
14. Run the pump at maximum discharge
pressure to secure the valve seats into
the fluid end tapered holes.
POWER END SERVICE
DANGER
Before attempting to service the
power end of the pump, the following
safety
precautions
must
be
observed:
1. Shift the pump transmission into
the neutral gear.
2. Shut off the pump engine and
remove the key from the ignition
to prevent starting the engine
inadvertently.
The power end service procedures deal first
with major assemblies, namely crosshead,
connecting rod, crankshaft, and knuckle
joints and then describe how to access all
individual parts.
Oil Stop Head Seal Retainer and
Crosshead Guide End Plate (FIGURE 2-2
and FIGURE 2-3)
1.
Remove the fluid end following the
procedure described in "Fluid End
Removal and Installation,” page 21.
2.
Remove the hinged crosshead cradle
inspection cover.
3.
Remove the drip pan and stroke
counter bracket.
4.
Remove the tie rod sleeves.
5.
Remove the extension rods using a
3/4” drive x 2” six point socket.
6.
Remove
the
extension
rod
seal
retainers and inspect seals and O-rings
for wear or damage.
7.
Remove the crosshead guide end
plate.
Crosshead Assembly (FIGURE 4-3)
1.
Remove the fluid end following the
procedure described in "Fluid End
Removal and Installation,” page 21.
2.
Remove the oil stop head seal retainer
and
crosshead
guide
end
plate
following the procedure described in
“Oil Stop Head Seal Retainer and
Crosshead Guide End Plate,” page 24.
3.
Remove the rear inspection covers
from power frame and inspect the
gaskets.
4.
Remove rod cap bolts.
5.
Install rod cap removal tool in rod cap.
6.
Prior to removing rod cap, one person
should hold pressure against extension
rod to prevent the crosshead and rod
assembly from moving forward away
from
the
crank
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