88
Tracks. The 329D comes standard with
grease lubricated tracks. The track links
are assembled and sealed with grease
to decrease internal bushing wear,
reduce travel noise and extend service
life lowering operating costs.
Structure

329D structural components and undercarriage are the backbone

of the machine's durability.

Structures. Proven structural
manufacturing techniques, assure
outstanding durability and service
life from these important components.
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.
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.
Undercarriage Options. Two under-
carriage options, long (L) and long
narrow (LN) allow you to choose
the best machine for your application
and business needs.
Long Undercarriage. The long under-
carriage (L) maximizes stability and
lift capacity. This long, wide and
sturdy undercarriage offers a very
stable work platform.
Long Narrow Undercarriage.
The long and narrow undercarriage
(LN) provides the best choice when
ease of transport is important while
maintaining excellent lift capacity.