Milton CAT 345D L - Manual (Page 9)

Carbody. The 345D L has three
undercarriage options to meet regional
transportation requirements and
application needs.
• Fixed gauge for narrow transport
and weight sensitive areas.
• Variable gauge for increased
track and ground clearance and
over-side lift.
• Wide variable gauge, provided as
an attachment to the variable gauge
machine, provides a significant
increase in over-side lift with the
capability for handling larger buckets.
The carbody utilizes a columnless
design that allows the swing bearing
to be directly mounted on the top plate
for excellent rigidity and strength.
Upper Frame. The rugged main frame
is designed for maximum durability.
Robot welding is used for consistent,
high-quality welds. The main channels
are box sections connected by a large
diameter tube in the boom foot area to
improve rigidity and strength. The outer
frame utilizes curved side rails for rigidity
against bending and torsional loads.
Counterweights. The 345D L has
several counterweight options to best
match the machine to your application.
Counterweight removal device is
available for the 7.6 mt (16,760 lb)
and 8.7 mt (19,180 lb) counterweights
to facilitate transport when needed.
Track Roller Frame. Fixed Gauge
Undercarriage
• Uses a press-formed, pentagonal
section for the track frame that is
robot-welded for weld consistency
and quality. The track frame has
been designed so that the top of
the track frame has a steep angle
to help prevent accumulation
of mud and debris.
Variable Gauge Undercarriage
• The track roller frame is made of
thick steel plate that is bent into a
U shape and welded to the bottom
plate to create a box structure.
The box structure design increases
rigidity and impact resistance.
9
Structures
The 345D L structural components are the backbone of the machine’s durability.