Case Cx330

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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

carbody that will now completely enclose the swing


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


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.

Hydraulic power

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 genious

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


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 excavtor 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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