CAT Hydraulic Excavator 325DL - Manual (Page 8)

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.
Undercarriage. Durable Cat ®
undercarriage absorbs stresses and
provides excellent stability.
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.
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 325D L.
This long, wide, and sturdy undercarriage
offers a very stable work platform.
8
Structures
325D structural components and undercarriage are the backbone
of the machine’s durability.