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321D LCR |
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Hydraulic Excavator |
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Engine |
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Operating Weight – |
24 180 kg |
53,308 lb |
Engine Model |
Cat® C6.4 ACERT™ |
Long Undercarriage 2 |
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Net Flywheel Power |
110 kW |
148 hp |
• Reach boom, R2.9B1 (9 ft 6 in) Stick, 0.9 m3 (1.18 yd3) |
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Weights |
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Bucket, 800 mm (32 in) Shoes |
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Operating Weight – |
23 530 kg |
51,875 lb |
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Long Undercarriage |
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•Reach boom, R2.9B1 (9 ft 6 in) Stick, 0.9 m3 (1.18 yd3) Bucket, 600 mm (24 in) Shoes
321D LCR Hydraulic Excavator
The D Series incorporates innovations for improved performance and versatility.
Compact Radius |
C6.4 with ACERT™ Technology |
Hydraulics |
The 321D LCR is a “Compact Radius” machine developed so that it can work in the narrow job-site. The cylindrical upper frame and cylindrical operator station, allow the 321D LCR to rotate in the narrower job-sites. pg. 4
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
The hydraulic system has been designed to provide reliability and outstanding controllability. An optional Tool Control System provides enhanced flexibility. pg. 6
Work Tools – Attachments |
Versatility |
A variety of work tools, including |
Caterpillar offers a wide variety of |
buckets, couplers, hammers, and shears |
factory-installed attachments that |
are available through Cat® Work Tools. |
enhance performance and job site |
pg. 11 |
management. pg. 12 |
The Caterpillar 321D LCR 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 321D LCR offer you the tools to help lower your owning and operating costs.
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Structures
Caterpillar® design and manufacturing techniques assure outstanding durability and service life from these important components. pg. 7
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
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. 13
Booms, Sticks and Bucket Linkages
The bucket linkage pins on the mass excavation configuration have been enlarged to improve reliability and durability. pg. 10
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. 14
New Feature
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Compact Radius
The 321D LCR delivers exceptional performance and comfort.
Compact Radius. The 321D LCR features a compact radius design, which makes it ideal for working in space restricted areas such as: close to buildings, road construction – limiting lane closures
or logging roads. The tail swing is just 1.68 m (5'6") as compared to the
2.75 m (9'0") on the 320D. When rotated
90 degrees and working over the side, a minimal amount of counterweight extends beyond the track width.
Operator Confidence. Due to the 321D LCR’s compact working envelope, operators can work confidently knowing that the counterweight will not swing into any object behind them.
Comfort. The cab on the 321D LCR is a comfortable place to work, with low sound levels, good visibility and convenient access to switches and controls. The 321D LCR cab offers many of the same amenities and options found in the cab of the 320D/320D LRR.
Working Envelope. To further minimize the working envelope, the boom is repositioning more towards the center of the machine as compared to a standard excavator. This reduced the front swing radius when the boom is pulled all the way up and the stick brought in completely. This design also increases the lift capacity of the 321D LCR over the front as it has a better mechanical advantage when compared to a standard excavator.
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C6.4 with ACERT™ Technology
The Cat® C6.4 gives the 321D LCR exceptional power and fuel efficiency unmatched in the industry for consistently high performance in all applications.
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 321D LCR, equipped with the C6.4 engine with ACERT™ Technology, provides 7% more power as compared to the 3066TA in the 321C LCR. 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.
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Hydraulics
Cat® hydraulics deliver power and precise control to keep material moving.
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 321C LCR) 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 321D LCR 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 321D LCR. 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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Structures
321D LCR is designed to handle the most rugged operating conditions, while providing long life and value.
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 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% 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 321D LCR’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.
Engine Hood. The 321D LCR features a one-piece, flat engine hood. The engine hood opens backwards and is located in a place that does not obstruct access to inspection points in the engine compartment.
Counterweight. The counterweight is split into two pieces for improved serviceability. The top piece weighs
approximately 2268 kg (5,000 lb), and the bottom weighs 3832 kg (8,450 lb). The counterweight is a rounded cast structure that minimizes the amount of overhang.
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Operator Comfort
Caterpillar offers the most intuitive and easy to operate excavators while providing great all around visibility and exceptional operator comfort.
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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.
Climate Control. 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 cab is made of pressed-steel plates. The pillars, beams and crossbeam, are formed box-shape, which improves the resistance of fatigue and vibration.
Hand Control Pattern Changer (Optional). Switches the joystick pattern between ISO and SAE patterns. For easy access, the pattern changer is located in the cab, underneath the floor mat. In order to change positions, simply remove the bolt, slide the lever into the appropriate location, then secure the bolt.
Sliding Door. The cab door slides alongside the cab and takes less space to open and close than a hinged door. This unique design allows the operator to easily get in and out of the cab when working next to objects or walls.
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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