Milton CAT 320D L - Manual (Page 5)

Component Layout. To optimize
efficiency of hydraulic performance,
the hydraulic components are located
close together, which reduces friction
loss and pressure drops in the lines.
System Pressure. System pressure has
been increased to 35,000 kPa (5,076 psi),
which attributes to improved
performance:
• Increased stick and bucket forces
(up 7 percent higher than the 320C)
to better handle those tight digging
conditions
• More drawbar pull (206 kN –
46,322 lb) to provide more ability
to climb slopes, easier spot turns and
improved travel in poor underfoot
conditions
• More lift capacity, generally over
the front where you are generally
hydraulically limited
Heavy Lift. The 320D features the
addition of a heavy lift, which increases
system pressure to 36,000 kPa (5,220 psi),
giving even more lift capacity over
the front. Heavy Lift is activated be
depressing the soft switch on the right
hand console. As the pressure increases,
the engine speed is reduced, which allows
better control while lifting objects.
Pilot System. The pilot pump is
independent from the main pumps and
controls the front linkage, swing and
travel operations.
Hydraulic Cross Sensing System.
The hydraulic cross sensing system
utilizes each of two hydraulic pumps to
100 percent of engine power, under all
operating conditions. This improves
productivity with faster implement
speeds and quicker, stronger pivot turns.
Boom and Stick Regeneration Circuit.
Boom and stick regeneration circuit
saves energy during boom-down and
stick-in operation which increases
efficiency, reduces cycle times and
pressure loss for higher productivity,
lower operating costs and increased
fuel efficiency.
Auxiliary Hydraulic Valve. The auxiliary
valve is standard on the 320D. Control
Circuits are available as attachments,
allowing for operation of high and
medium pressure tools such as shears,
grapples, hammers, pulverizers,
multi-processors and vibratory plate
compactors.
Hydraulic Cylinder Snubbers. Snubbers
are located at the rod-end of the boom
cylinders and both ends of the stick
cylinders to cushion shocks while
reducing sound levels and extending
component life.
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Hydraulics
Cat ® hydraulics deliver power and precise control to keep material moving.