Structures – CAT Hydraulic Excavator 328D LCR User Manual

Page 8

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Robotic Welding. Up to 95% of the
structural welds on a Caterpillar

®

Excavator are completed by robots.
Robotic welds achieve over three times
the penetration of manual welds.

Carbody Design and Track Roller
Frames.
X-shaped, box-section carbody
provides excellent resistance to torsional
bending. Robot-welded track roller
frames are press-formed, pentagonal
units to deliver exceptional strength
and service life.

Main Frame. Rugged main frame is
designed for maximum durability and
efficient use of materials.

Swing Bearing. The swing bearing
utilizes cross roller bearings versus the
traditional ball bearing design. The cross
roller bearing design allows for more
surface contact to absorb the stresses
that are a result of the high swing torque
that Cat offers. It provides exceptional
machine stability and reduces machine
pitching during boom down operation.

Undercarriage. Durable Cat
undercarriage absorbs stresses and
provides excellent stability.

Rollers and Idlers. Sealed and lubricated
track rollers, carrier rollers, and idlers
provide excellent service life, to keep
the machine in the field longer.

Long Undercarriage. The long (L)
undercarriage maximizes stability and
lift capacity. Two additional track links
have been added to the 328D LCR.
This long, wide, and sturdy undercarriage
offers a very stable work platform.

8

Structures

328D LCR structural components and undercarriage are the backbone of the
machine’s durability.

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