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Case
CX330
As you may know, the
CX330 is the upgrade to the 9050B model from Case. The CX330 is
quite an upgrade, being much bigger than the 9050B. In standard
form, the CX330 is almost 5,000 pounds heavier than the 9050B. This
added weight comes from a larger counterweight and from a redesigned
car body that will now completely enclose the swing system.
These added pounds will also contribute to the boost in the CX330s
over-front capacity, and in combination with higher hydraulic
pressures the travel circuit, give the excavator a very impressive
16% boost in draw bar pull, which means more power for negotiating
poor underfoot conditions and very steep grades.In addition to the new features, the CX330s digging linkage has been
enhanced in many ways. The boom and arm, deeper in cross section to
accommodate higher digging forces, now incorporate V-groove type
welds that are placed by robots and 100 percent ultra sound
inspected.The boom foot and
boom to arm pivots use improved bushings, new plated pins, and new
dust seals that combine to make a more durable and easier to take
care of assembly. The newly hardened chrome pins will also
contribute to the overall digging linkage durability. Even though
the basic 6 cylinder, 8.3 liter engine in the CX330 has been used in
Case products since 1985, continual refinement over the years has
changed nearly 85% of the original engine's part numbers. The CX330
features 259 net HP with an air to air intercooler and a free
breathing 24 valve cylinder head.
The electronic logic that controls the new engine's fuel system
tracks the machine's operating parameters and keeps the system
continually armed to respond instantly and precisely to the fuel
requirements of each individual cylinder. The total electronic
design of the engine will also eliminate cable and step motor
controls from the fuel system, with a large gain in reliability.
Even though modest changes in the CX330s digging linkage geometry
will contribute to the higher forces of digging, the big guns here
are the refinement of the trench with it's open center hydraulic
system. The main pressure in the implement circuit is up almost 8%,
with the hydraulic cylinder diameter up 7% as well.
The increase in hydraulic power combines with the more efficient
linkage geometry to yield almost 20% more bucket digging force and
15% more arm force. With 19 more HP, the CX330 can drive it's main
hydraulic pumps with much better force. In addition, the new pumps
will produce about 6% more flow for increased hydraulic speed at
much lower system pressures.
The new PCS (Pro Control System) will manage the hydraulic system
and interface with the 6TAA-830 engine, and does it with more
electronic genius than the 9050B did. Similar to the 9050B, the
CX330 does have manually selected working modes, although it departs
from previous designs by adding a new automatic work mode. By
working in the new automatic mode, the CX330 can analyze load
demands and operator input at the joystick, then adjust the engine
and hydraulic pumps to balance power and speed with efficiency and
even with the economy.
Other PCS features include a high speed assistance system, which
will speed up boom and arm functions, and an automatic power boost
system as well. The power boost system will increase main pressure
by 10% for 8 seconds if the implement system reaches the standard
relief pressure for more than 1 second in tough digging conditions.
With everything the CX330 from Case offers, it's truly the best
excavator in years. Case has outdone themselves this time, doing
their part to make excavating both fun and exciting. If you've been
looking for the perfect upgrade from the 9050B, the CX330 is all
that and a bag of chips.
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