Compact Excavator:

The compact hydraulic excavator can be a tracked or wheeled vehicle with an approximate operating weight
of 13,300 pounds.  Normally, it includes a standard backfill blade and features an independent boom swing.  The compact hydraulic excavator is also known as a mini excavator. A compact hydraulic excavator is different from other types of heavy machinery in the sense that all movement and functions of the machine are accomplished through the transfer of hydraulic fluid.

Caterpillar D-11:

The D-11 from Caterpillar is among the series of tracked type tractors are among the largest conventional bulldozers in the world, second to the Komatsu D575.  It comes in two variations, the standard D-11R and the bigger and heavier D-11R CD.

The D-11 bulldozer is among the upper end of  Caterpillars track type tractors, which range in power and size from the D-3 (77 HP) to the D-11R (935 HP).The primary use for the D-11 is for moving large quantities of rock, dirt, etc. short distances in confined spaces.  The D-11 is often times used in quarries.  The price, size, power and weight of the D11 dictate that they are used primarily for major products.  You can normally find the D11 used in forestry, mining, excavation, and quarry operations.

The 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 carbody that will now completely enclose the swing system. 

Bulldozer

The bulldozer is a very powerful crawler that is  equipped with a blade.  The term bulldozer is often used to mean any type of heavy machinery, although the term actually refers to a tractor that is fitted with a dozer blade. Often times, bulldozers are large and extremely powerful tracked vehicles.  The tracks give them amazing ground mobility and hold through very rough terrain.  Wide tracks on the other hand, help to
distribute the weight of the dozer over large areas, therefore preventing it from sinking into sandy or muddy ground. 

Backhoe Loader:

Also referred to as a loader backhoe, the backhoe loader is an engineering and excavation vehicle that consists of a tractor, front shovel and bucket and a small backhoe in the rear end.  Due to the small
size and versatility, backhoe loaders are common with small construction projects and excavation type work. Originally invented in Burlington Iowa back in 1857, the backhoe loader is the most common variation of
the classic farm tractor.  As the name implies, it has a loader assembly on the front and a backhoe attachment on the back.