Milton CAT 320D FM - Manual (Page 8)

Rugged main frame design maximizes
durability.
• Outer frame utilizes curved side
rails, which are di-formed for
excellent uniformity and strength.
• Box-section channels improve upper
frame rigidity under the cab.
• Inverted U-channels span the width
of the main frame and are formed,
rather than fabricated, for superior
strength and reduced weight.
• Boom tower and main rails are
constructed of solid, high-tensile
strength, steel plates.
• Boom foot and engine mount areas
are reinforced for additional strength.
• Sheet metal supporting structure is
improved by integrating the mounting
into the upper frame structure.
Carbody Design. Advanced, reinforced,
purpose-built carbody design stands up
in the toughest forest applications.
Carbody Structure. Wide, tall, and thick
carbody structure provides operating
stability and durability while improving
operation’s effectiveness.
• Upper structure weight and stresses
are distributed evenly across the full
length of the track roller frame.
• Smooth transitions and long welds
help reduce stresses at the carbody-
to-roller frame junctions for
excellent durability.
• Robot welding helps ensure consistent,
high-quality welds throughout the
manufacturing process.
8
Purpose-built forest applications with reinforced carbody, rugged swing bearing, heavy
doors and extra guarding.
Structures
Caterpillar guarding protects your forestry machine investment.
Guarding
Shoe Support Guards. Standard full-
length track shoe support guards help
protect rollers and provide increased
rigidity to track links in rough
underfoot conditions. Factory Forestry Cab. Caterpillar factory
forestry designed and built FOPS cab
has options for windshield guard and
window guards to meet local guarding
requirements. The right side and rear
windows are made from impact-
resistant polycarbonate.
Heavy-Duty Access Doors.
Heavy-duty access doors are standard
on the 320D FM and are made from
6 mm (0.24 in), high-strength, low alloy
steel. Positive locking latch stays closed
in forestry applications. Hinges have
larger diameter pins over standard
doors. The smooth door profile
enhances machine appearance.