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Page 23
12. Be sure the O-ring is installed on the
seat and snap the valve seat into the
taper by hand to fit tightly.
13. Place the valve on the top of the valve
seat.
14. Bump the seat into the taper 2-3 times
with a heavy bar to make the fit tight.
15. Inspect the valve guide bore diameters
for excessive wear. And replace as
required.
16. Reinstall the suction valve guide,
spring, and keeper to the bottom of the
fluid end, compress the spring (See
Step 8 above) and install the valve
keeper pin into the valve stem. Slowly
release the compression on the valve
spring until the valve keeper comes to
rest on the keeper pin.
17. Install a new roll pin into the valve
stem to hold the keeper pin in place.
18. Raise the suction manifold to the
bottom of the fluid end and re-install
the suction manifold bolts to the torque
specified on page 34.
19. Install new seals on the covers and
reinstall the suction valve covers and
retainer nuts.
14. Install new seals on the discharge
covers and reinstall the discharge
valves, springs, covers and nuts.
15. Run the pump at 80% maximum
discharge pressure or until the seats
“pop” into the fluid end tapered holes.
(Listen for 10 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.
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.
Remove the plunger clamps and slide
the plungers forward.
3.
Remove the Oil Stop Head retainer
cap screws and remove the Head.
4.
Disconnect the input drive-line and
remove the input drive flange from the
pinion shaft.
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 4-3)
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
Содержание C2500Q QUINTUPLEX
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