Milton CAT 320D LRR User Manual

Engine

Engine Model Cat®C6.4 ACERT™

Net Flywheel Power 110 kW 148 hp
Weights
Minimum Operating Weight 21 210 kg 46,755 lb

• Reach boom, R2.5B1 (8 ft 2 in) Stick, 0.47 m3(0.61 yd3)
Bucket, 600 mm (24 in) Double grouser shoes

Maximum Operating Weight 24 990 kg 55,093 lb

• Heavy-duty reach boom, Heavy-duty R2.9B1 (9 ft 6 in)
stick, 1.38 m3(1.80 yd3) Bucket, 600 mm (24 in) Triple
grouser shoes

320D LRR

Hydraulic Excavator

®

®

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320D LRR Hydraulic Excavator

The D Series incorporates innovations for improved performance and versatility.

The Caterpillar

®

320D LRR excavator provides
all the elements to give you the lowest cost
to own and operate. At the end of the day, it
all comes down to how much work you got
done and how much did it cost you.
Caterpillar and the 320D LRR offer
you the tools to help lower your
owning and operating costs.

Versatility

Caterpillar offers a wide variety of
factory-installed attachments that
enhance performance and job site
management. pg. 12

Work Tools – Attachments

A variety of work tools, including
buckets, couplers, hammers, and shears
are available through Cat®Work Tools.

pg. 11

✔

Hydraulics

The hydraulic system has been designed
to provide reliability and outstanding
controllability. An optional Tool Control
System provides enhanced flexibility.

pg. 6

C6.4 with ACERT™ Technology

ACERT™ Technology works at the
point of combustion to optimize engine
performance and provide low exhaust
emissions to meet U.S. EPA Tier 3
emission regulations, with exceptional
performance capabilities and proven
reliability. pg. 5

✔

Reduced Radius

The 320D LRR features a reduced tail
swing design that allows it to work well
in space restricted areas, while providing
maximum comfort. pg. 4

✔ New Feature

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Service and Maintenance

Fast, easy service has been designed in
with extended service intervals, advanced
filtration, convenient filter access and
user-friendly electronic diagnostics for
increased productivity and reduced
maintenance costs. pg. 14

✔

Complete Customer Support

Your Cat®dealer offers a wide range
of services that can be set up under a
customer support agreement when you
purchase your equipment. The dealer will
help you choose a plan that can cover
everything from machine configuration
to eventual replacement. pg. 13

Booms, Sticks and Bucket Linkages

One boom and two sticks are available,
offering a range of configurations suitable
for a wide variety of application
conditions. pg. 10

Operator Comfort

Provides maximum space, wider visibility
and easy access to switches. The monitor
is a full-color graphical display that
allows the operator to understand
the machine information easily.
Overall, the new cab provides
a comfortable environment for
the operator. pg. 8

✔

Structures

Caterpillar®design and manufacturing
techniques assure outstanding durability
and service life from these important
components. pg. 7

Reduced Radius. The tail swing of this
machine has been reduced where the
back end of the machine won’t extend
beyond the length of the tracks. The tail
swing is just 2.0 m (6'7") as compared
to the 2.75 m (9'0") on the 320D. When
rotated 90 degrees and working over the
side, just 600 mm (2'0") hangs over the
side. This allows the 320D LRR to work
well in road construction applications
and other space restricted areas.

Stability. The 320D LRR offers a very
stable platform providing great stability
for all applications. When compared
to 320D L, the 320D LRR delivers up
to 6% additional lift over the side with
the heavier counterweight. One of the
main contributors is the additional
counterweight used on the 320D LRR.
This allows for the balance of the machine
to be comparable to a standard machine
with a longer tail swing.

Comfort. The cab of the 320D LRR is the
same full-sized cab with all the amenities
and attachments found on the cab of the
320D L.

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Reduced Radius

The Caterpillar 320D LRR is designed for high maneuverability in confined spaces.

Cat C6.4. The Cat C6.4 with ACERT™
Technology introduces a series of
evolutionary, incremental improvements
that provide breakthrough engine
technology. The building blocks of
ACERT Technology are fuel delivery,
air management and electronic control.
ACERT Technology optimizes engine
performance while meeting U.S. EPA
Tier 3 emission regulations. With its
proven technology, robust components
and precision manufacturing, you can
count on this engine to power up at start
time and keep working productively all
shift long.

Performance. The 320D LRR, equipped
with the C6.4 engine with ACERT™
Technology, provides 7% more power as
compared to the 3066TA in the 320C LU.
The additional power delivers a speed and
efficiency advantage in high production
applications.

Automatic Engine Speed Control.

The two-stage, one-touch control
maximizes fuel efficiency and
reduces sound levels.

ADEM™ A4 Engine Controller.

The ADEM A4 electronic control module
manages fuel delivery to get the best
performance per liter of fuel used.
The engine management system provides
flexible fuel mapping, allowing the engine
to respond quickly to varying application
needs. It tracks engine and machine
conditions while keeping the engine
operating at peak efficiency.

Electronic Control Module.

The Electronic Control Module (ECM)
works as the “brain” of the engine’s
control system, responding quickly to
operating variables to maximize engine
efficiency. Fully integrated with sensors
in the engine’s fuel, air, coolant, and
exhaust systems, the ECM stores and
relays information on conditions such
as rpm, fuel consumption, and
diagnostic information.

Fuel Delivery. The Cat C6.4 features
electronic controls that govern the fuel
injection system. Multiple injection
fuel delivery involves a high degree
of precision. Precisely shaping the
combustion cycle lowers combustion
chamber temperatures, generating fewer
emissions and optimizing fuel combustion.
This translates into more work output
for your fuel cost.

Cooling System. The cooling fan
is directly driven from the engine.
An electrically controlled viscous clutch
fan is available as an attachment to reduce
fan noise. The optimum fan speed is
calculated based on the target engine
speed, coolant temperature, hydraulic
oil temperature and actual fan speed.
When fan speed is reduced, there’s
more power available for other
functions – and less fuel is burned.

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C6.4 with ACERT™ Technology

The Cat®C6.4 gives the 320D LRR exceptional power and fuel efficiency, unmatched in the
industry, for consistently high performance in all applications.

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% higher than the 320C LU)
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 LRR 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 by
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 LRR.
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.

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%, 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.

Rugged Structures. Structural components
and the undercarriage are the backbone
of the machines’s durability. Caterpillar
places a lot of emphasis on the machine’s
durability during the designing and
manufacturing of its excavators.

• Up to 95% 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 LRR’s main frame utilizes
high-tensile strength steel and a one­piece 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.

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Structures

320D LRR is designed to handle the most rugged operating conditions, while providing long
life and value.

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Caterpillar offers the most intuitive and easy to operate excavators while providing great all
around visibility and exceptional operator comfort.

Operator Comfort

Operator Station. The layout of the interior

has been redesigned to maximize operator
comfort and reduce operator fatigue.

• Frequently used switches have been
relocated for easier access.

• Consoles and armrests have been
redesigned for better comfort and
adjustability.

• More seat options – choose from the
standard mechanical suspension seat,
or the optional air suspension seat with
heater. Both provide excellent comfort.

Standard Cab Equipment. To enhance
operator comfort and productivity, the
cab includes a lighter, drink holder, coat
hook, service meter, literature holder,
magazine rack and storage compartment.

Joystick Control. Joystick controls have
low lever effort and are designed to match
the operator’s natural wrist and arm
position.

Hydraulic Activation Control Lever.

For added safety, this lever must be in the
operate position to activate the machine
control functions.

Automatic Climate Control.

Fully automatic climate control adjusts
temperature and flow, and determines
which air outlet is best in each situation
with a touch of a button.

Cab Exterior. The exterior design uses
thick steel tubing along the bottom
perimeter of the cab, improving the
resistance of fatigue and vibration.

Cab Mounts. The cab shell is attached
to the frame with viscous rubber cab
mounts, which dampen vibrations and
sound levels while enhancing operator
comfort.

Windows. All glass is affixed directly to
the cab for excellent visibility eliminating
window frames.

Wipers. Pillar-mounted wipers increase
the operator’s viewing area and offer
continuous and intermittent modes.

Skylight. An enlarged skylight with
sunshade provides excellent visibility
and ventilation.

Monitor. The monitor is a full color Liquid
Crystal Display that gives you vital
operating and performance information,
alerts in text, all in a simple, east to
navigate format.

Default Display. Three analog gauges,
fuel level, hydraulic oil temperature
and coolant temperature, are displayed
in this area.

Main Menu. Four menu options to
choose from:

Settings – Adjust monitor settings, select
work tool or choose video mode (when
equipped with a camera)

Maintenance – Displays service intervals
and hours accumulated since last serviced.

Performance – Displays machine
performance attributes such as Engine
Speed, Coolant and Hydraulic Oil
Temperature.

Service – Allows access to machine
parameters for service intervals,
diagnostic information and information
related to the machines software.

Event Display. Machine information is
displayed in this area with the icon and
language.

Multi-information Display. This area
is reserved for displaying various
information which is convenient for the
operator. The “CAT” logo is displayed
when no information is available to be
displayed.

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