Contractors World

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Contractors World 2011 Volume 2 Issue 9
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Tracked excavators

Four from Caterpillar - Page 2 of 2

Almost gonei s the sleek curved design on the latest Cat excavators as designers try to make space for the after-engine treatment and filets the new engines demand. A common feature to the new engines is great output with less fuel but to benefit from this hydraulic systems need to be optimised and in communication with the engine management systems.

Almost gone are the sleek curves of former models as designers try to make space for the after-engine treatment and filets the new engines demand.

The Cat excavators have ‘one-touch’ idle control and an engine shut down setting via the monitor control panel which effectively stops the engine after it has idled for a pre-set time.

Other features include load sensing to deliver power where its required and economy mode which maintains a constant engine speed regardless of load - a useful option in many truck loading applications.

Looking after the operatorLooking after the operator

There seems to be no end to the level of comfort, space and safety that is being built in to operator cabs today. More space has generally been made available by electronic controls and integrated digital display units which enable the operator to sit in a more comfortable position.

Additional space is made possible using new, less bulky components for soundproofing and composite structural materials which are also lighter and stronger.

The latest cabs from Cat feature new cab seals and a new roof-lining material to lower in-cab sound levels. The LCD monitor is larger and simpler to use - a positive move to encourage operators to fully use the settings available. For most operators, the simpler the better.

Caterpillar ever since the Cat Comfort Seat has put a lot of R&D in to providing what they consider to be the best seats in the industry. New seat options include new heated and air-cooled options while the automatic climate control system has improved air flow. Dual 12-v power outlets add convenience.

All four new excavators have a redesigned motor housing that prevents mud packing and debris buildup around seals.Undercarriage

There are some changes to the basic undercarriage. The 329E, for instance, has a grease-lubricated undercarriage that has a press-fit master link (instead of the slip-fit type) to improve durability. A new optional three-piece guiding guard assists in maintaining track alignment.

All four new excavators have a redesigned motor housing that prevents mud packing and debris buildup around seals. With the exception of the 349E, the new models have two counterweights options. The counterweight removal system comes with new integrated links to enable easy removal for maintenance or shipping. The 349E has the option of either fixed or variable gauge configuration.

A benefit of the larger engine housing is that it has enabled bigger access doors to be fitted and an improved hood providing easy access to the engine and cooling compartments. Servicing

A benefit of the larger engine housing is that it has enabled bigger access doors to be fitted and an improved hood providing easy access to the engine and cooling compartments.

Filters within the cooling package tilt out for easier cleaning and replacement and, as with fuel and engine filters, are accessible from the ground.

Cat ‘Quick-Evac’ port facilitate easy changing of engine and hydraulic oil as well as fluid sampling ports for Cat’s SOS fluid analysis service.


 

 

 

 
Click here for more information>>> Caterpillar E-Series Excavators
 

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Publisher: Roger Lindley
Content compiled and edited by:
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Page updated: October, 2011

 

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