Gardner Denver HD-2250, Operating And Service Manual

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Page 23
Installation:
1. Loosen the jackbolts so that they do not
extend from the mating face of the
retainer. This allows the retainer to mate
flush against the valve cover when
properly installed
2. Install
the suction/discharge cover
retainer nut in the fluid cylinder and
tighten using a socket or wrench.
NOTE: Power driven or impact wrenches
are not permitted.
3. Torque alternate jackbolts in two steps.
Torque to 30 ft.lbs in step 1. Following
same pattern, torque the jackbolts to 60
ft.lbs in step 2.
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.
If equipped, 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
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, packing, and
spacers.
8. Inspect the plunger, the packing, the
rod wiper, and the packing nut for
excessive wear, nicks, burrs, or any
other defects. Replace expendable
parts as necessary.
9. Clean and grease the packing bore in
the fluid end.
10. Install the packing in the packing bore
with the packing lips toward the front of
the fluid end. See FIGURE 4-2.
FIGURE 4-2 Packing Assembly
1
2
3
4 5
6