Gardner Denver HD-2250, Руководство по эксплуатации и обслуживанию

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Page 25
10. Bump the seat into the taper 2-3 times
with a heavy bar to make the fit tight.
11. Reinstall the valve spring and suction
valve spring retainer.
12. Reinstall the suction valve cover and
retainer nut.
13. Reinstall the discharge valve, spring,
cover, and retainer nut.
14. Run the pump at 80% to 100% of the
maximum discharge pressure until the
seats “pop” into the fluid end tapered
holes. (Listen for 6 distinct loud “pops”)
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, knuckle joints
and gear and pinion sets and then describe
how to access all individual parts.
Oil Stop Head Seal Retainer and Gear
Covers (FIGURE 2-2 and FIGURE 2-3)
1.
Remove any plunger / cradle-chamber
covers or guards.
2.
Disconnect the input drive-line and
remove the input drive flange from the
pinion shaft.
3.
Remove the plunger clamps and slide
the plungers forward.
4. Remove the Oil Stop Head retainer
cap screws and remove the Head.
5.
Remove roto-seals and oil hoses from
gear covers.
6.
Remove input seal housing from left-
hand cover.
7.
Remove the cap screws in gear covers.
Covers can now be removed.
Crosshead Assembly (FIGURE 4-4)
1.
Remove the fluid end following the
procedure described in "Fluid End
Removal and Installation,” page 20.
2.
Remove the oil stop head seal retainer
and off-drive gear cover following the
procedure described in “Oil Stop Head
Seal Retainer and Gear Covers”, page
23.
3.
Remove the rear inspection cover from
power frame. (inspect the gaskets)
4. Rotate crankshaft until rod bearing
housing is in highest position. Using
socket and impact wrench or
special conn-rod wrench, remove
bottom 3 lock-nuts.
5. Remove three nuts on top of conn-rod.
6.
Screw ¾”-10 all-thread into conn-rod
bearing housing as a handle.
7. While another person is moving the ¾”
all-thread in an up and down motion,
pull the crosshead assembly forward,
out of the front of the pump.
8. Remove the Pony Rod from the
crosshead assembly by using a spanner
wrench
to rotate the rod
counterclockwise.
9. To remove the wrist pin, remove one of
the wrist-pin snap rings.
10. Remove the wrist pin through the side
of the crosshead. The crosshead may
now be removed from the conn rod.