Gardner Denver HD-2250, Руководство по эксплуатации и обслуживанию

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Page 24
11. Install and hand tighten the packing nut
to align the packing in the borehole.
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 of the
plunger, and the extension rod for
cleanliness.
16. Install the clamp and tighten the clamp
screws to the specified torque on page
34.
17. Tighten the packing nut again.
18. Replace the O-ring and back-up rings
on the suction cover and apply grease
or O-ring lube.
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.
Valve and Seats Replacement
This procedure can be performed with the
fluid cylinder on the pump. Before starting,
make sure that special tools required for this
procedure are available. For part number of
the tools see Parts Manual.
WARNING
Never try to remove or cut a valve
seat with a torch. Severe damage to
the fluid end may occur.
1.
Remove the discharge cover retainer
nut with the proper hex wrench.
2.
Remove the discharge cover with a
“slide hammer type” puller.
3. Remove the suction cover retainer nut
with the proper hex wrench.
4.
Remove the suction cover with a “slide
hammer type” puller.
5.
Remove the suction valve spring
retainer. The suction valve spring and
valve can now be removed by hand.
FIGURE 4-3: Valve Cage Spring Retainer
FIGURE 4-4: Gunsight Spring Retainer
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.
Snap the replacement valve seat into
the taper by hand to fit tightly.
9.
Place the winged valve on the top of
the valve seat.