Milton CAT 320D L - Manual (Page 8)

Robust Undercarriage. A solid
foundation built tough to absorb the
stresses of everyday work.
• Rollers and idlers are sealed and
lubricated to extend service life.
• Track links are assembled and sealed
with grease to decrease internal
bushing wear and increase life by
as much as 25 percent, when
compared to dry seal undercarriages.
• Spring recoil system stroke has been
increased to better relieve excess
track tension, which can occur when
material builds up between the track
and sprocket.
Undercarriage Options. Choose the
undercarriage option that best matches
your application.
• Standard undercarriage – Works
well in restricted work spaces and
on uneven, rocky terrain. It’s also
preferred on jobs that require frequent
repositioning of the machine.
• Long undercarriage – Allows for
maximum stability and lift capacity.
Rugged Structures. Structural
components and the undercarriage
are the backbone of the machine’s
durability. Caterpillar places a lot of
emphasis on the machine’s durability
during the designing and manufacturing
of its excavators.
• Up to 95 percent of the structural
welds are welded by robots, which
achieve up to three times the
penetration of a manual weld and
improving overall durability of
the machine.
• The 320D’s main frame utilizes
high-tensile strength steel and a
one-piece swing table, which
improves strength and reliability.
• The carbody has a X-shaped, box
section design to resist bending and
twisting forces.
• Track roller frames are press-formed
in a pentagonal shape for additional
strength.
8
Structures
320D is designed to handle the most rugged operating conditions, while providing long life
and value.