321D LCR Hydraulic Excavator

Specifications

Engine

Engine Model

Cat® C6.4 ACERT™

Cat® C6.4 ACERT™

Net Flywheel Power

148 hp

110 kW

Net Power – ISO 9249

148 hp

110 kW

Bore

4.02 in

102 mm

Stroke

5.12 in

130 mm

Displacement

389 in3

6.4 L

Net Power – EEC 80/1269

148 hp

110 kW

Net Power – SAE J1349

148 hp

110 kW

Weights

Operating Weight

51875 lb

23530 kg

Operating Weight – Std. Undercarriage

51875 lb

23530 kg

Operating Weight – Long Undercarriage

51875 lb

23530 kg

Operating Weight – Long Undercarriage 2

53308 lb

24180 kg

Service Refill Capacities

Fuel Tank Capacity

87 gal

330 L

Cooling System

6.6 gal

25 L

Engine Oil

8 gal

30 L

Swing Drive

2.1 gal

8 L

Final Drive (each)

2.1 gal

8 L

Hydraulic System (including tank)

55 gal

208 L

Hydraulic Tank

32 gal

120 L

Hydraulic Tank (Including suction pipe)

35 gal

133 L

Swing Mechanism

Swing Speed

11.5 RPM

11.5 RPM

Swing Torque

45612 lb ft

61.8 kN·m

Drive

Maximum Drawbar Pull

46311 lb

206 kN

Maximum Travel Speed

3.5 mph

5.7 km/h

Hydraulic System

Main Implement System – Maximum Flow (2x)

54 gal/min

205 L/min

Max. Pressure – Equipment

5076 psi

35000 kPa

Max. pressure – Heavy Lift

5221 psi

36000 kPa

Max. Pressure – Travel

5076 psi

35000 kPa

Max. Pressure – Swing

3626 psi

25000 kPa

Pilot System – Maximum Flow

9 gal/min

32.4 L/min

Pilot System – Maximum Pressure

566 psi

3900 kPa

Boom Cylinder – Bore

4.7 in

120 mm

Boom Cylinder – Stroke

49.6 in

1260 mm

Reach Stick Cylinder – Bore

5.5 in

140 mm

B1 Family Bucket Cylinder – Bore

4.7 in

120 mm

Reach Stick Cylinder – Stroke

59.8 in

1518 mm

B1 Family Bucket Cylinder – Stroke

43.5 in

1104 mm

Sound Performance

Performance

ANSI/SAE J1166 APR 90

ANSI/SAE J1166 APR 90

Standards

Brakes

SAE J1026 APR90

SAE J1026 APR90

Cab/FOGS

SAE J1356 FEB88

SAE J1356 FEB88

Track

Number of Shoes (each side) – Long Undercarriage

49

49

Number of Track Rollers (each side) – Long Undercarriage

8

8

Number of Carrier Rollers (each side) – Long Undercarriage

2

2

Dimensions

Transport width

125.2 in

3180 mm

Shipping Height

9.9 ft

3030 mm

Benefits & Features

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. Compact Radius The 321D LCR delivers outstanding performance and comfort. » Learn More 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. 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. 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. 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. » Learn More 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 (5076 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 (5220 psi), giving even more lift capacity over the front. Heavy Lift is activated be depressing the soft switch on the right hand conslole. 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. 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. Hydraulics Cat® hydraulics deliver power and precise control to keep material moving. » Learn More 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. Operator Comfort Caterpillar offers the most intuitive and easy to operate excavators while providing great all around visibility and exceptional operator comfort. » Learn More 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. Structures 321D LCR is designed to handle the most rugged operating conditions, while providing long life and value. » Learn More Front Linkage Options The Reach Boom allows excellent all-around versatility and a large working envelope. It can be equipped with the following two sticks: R2.9B1 - performs well in a mid-range working envelope R2.5B1 - a good match when the job requires a larger bucket or a hammer Booms, Sticks and Bucket Linkages Built for Performance and long service life, Caterpillar® booms and sticks are large, welded, box-section structures with thick, multi-plate fabrications in high stress areas. » Learn More Wide Variety of Work Tools Caterpillar offers a complete line of work tools to match all of your application needs: Hammers - matched to Cat machines for optimum performance Thumbs, Stiff Link, Full Rotation - transforms your 321D LCR into a versatile material handling machine Grapples - choose from a large variety of grapples that best suit your application Multi-processors - does the work of many types of demolition tools by use of interchangeable jaws Shears - features 360 degree rotation and high force to weight ratio Pulverizers - ideally suited for rapid, non-explosive demolition applications Vibratory Plate Compactors - provide superior compaction force in a reliable, low maintenance package Rippers - perfectly suited for trenching and pipeline applications where conditions aren't favorable to traditional ripping methods Caterpillar Buckets The most extensive choice of buckets that can optimize machine performance and match your application needs. General Purpose Buckets - for digging in low impact, moderately abrasive materials such as dirt, loam, gravel and clay. Heavy-Duty Buckets - for use in abrasive applications such as mixed dirt, clay and rock. Heavy-Duty power Buckets - for use in abrasive applications where breakout force and cycle times are critical - good for materials such as mixed dirt, clay and rock. Ditch Cleaning Buckets - wide and shallow for ditch cleaning, bank forming and finishing. Caterpillar Ground Engaging Tools (GET) Choose from a wide variety of tips that maximize bucket and machine performance. Sidecutters and sidebar protectors are also available. Couplers Multiply the versatility and utility of 321D LCR. Hydraulic Pin Grabber Plus - allows quick and easy tool changes without having to leave the cab. Picks up a large variety of tools equipped with standard pins. Dedicated Coupler - no loss of tip radius, maximizing the breakout forces on your 321D LCR. Product Link Both the PL121 and PL321 are available as factory installed attachments.PL121 gives you Asset Watch, which includes the following features: Engine hours Machine location Time based fences (when the machines can operate) Geo-based fences (boundaries that the machine can operate)PL321 gives you all of the features listed for PL121, plus the ability to include Health and Maintenance Watch. Health Watch ° Codes from on-board EDM's/Sensors ° Estimated Fuel Consumption ° Fuel Watch Maintenance Watch ° Preventative Maintenance Planning ° Preventative Maintenance Checklists ° Overdue PM Notification ° PM History Recording Machine Security An optional Machine Security System is available from the factory on the 321D LCR. This system controls when the machine can be operated and utilizes specific keys to prevent unauthorized machine use, a significant theft deterrent. More Attachments The 321D LCR offers the most options available to equip your machine to best match your application and work environment requirements. From track shoe size to guarding packages to operator comfort options, the 321D LCR offers more options. Pump Compartment A service door on the right side allows for ground level access to the hydraulic pump, case drain and pilot filters. Greasing Points A concentrated remote greasing block on the boom delivers grease to hard-to-reach locations on the front. Anti-Skid Plate Anti-skid plate covers top of storage box and upper structure to prevent slipping during maintenance. Diagnostics and Monitoring The 321D LCR is equipped with S•O•SSM sampling ports and hydraulic test ports for the hydraulic system, engine oil, and for coolant. A test connection for the Cat Electronic Technician (Cat ET) service tool is located in the cab. Work Tools - Attachments The 321D LCR has an extensive selection of work tools to optimize machine performance. » Learn More Auxiliary Hydraulic Options Allows you to configure your 321D LCR to meet your work tools needs, while increasing its versatility. Single Function Circuit - suited for tools that require one-way flow with both pumps, such as hammers, vibratory plate compactors. Double Function Circuit - suited for tools that require two-way flow, utilizing one pump, such as thumbs or non-rotation grapples or shears. Tool Control System - accommodates single or double function tools, as well as rotating tools when equipped with medium pressure. – Stores pressure and flow information for up to 10 tools – Cat tools selectable that have preset flows and pressures – Shortcut button on right hand console, making tool selection easier. Versatility A wide variety of optional factory-installed attachments are available to enhance performance and improve job site management. » Learn More Ground Level Service The design and layout of the 321D LCR was made with the service technician in mind. Many service locations are easily accessible at ground level allowing critical maintenance to get done quickly and efficiently. Air Filter/Radiator Compartment The left rear service door allows easy access to the engine radiator, oil cooler and air-to-air-aftercooler. A wire mesh screen is provided between the aftercooler and radiator/oil cooler, where these is enough clearance to blow off debris using a wand. The air filter, also located within this compartment, features a double-element construction for superior cleaning efficiency. When the air cleaner plugs, a warning is displayed on the monitor screen inside the cab. Access to the washer tank and maintenance points for the electric components, such as the battery, circuit breaker and controller are also located in this compartment. the jump-start receptacle, which is an attachment for the cold weather package, is located near the battery. Service and Maintenance Simplified service and maintenance features save you time and money. » Learn More Product Support You will find nearly all parts at our dealer parts counter. Cat dealers utilize a worldwide computer network to find in-stock parts to minimize machine down time. Save money with remanufactured components. Machine Selection Make detailed comparisons of the machines you are considering before you buy. What are the job requirements, machine attachments and operating hours? What production is needed? Your Cat dealer can provide recommendations. Customer Support Agreements Cat dealers offer a variety of product support agreements, and work with customers to develop a plan the best meets specific needs. These plans can cover the entire machine, including attachments, to help protect the customer’s investment. Operation Improving operating techniques can boost your profits. Your Cat dealer has videotapes, literature and other ideas to help you increase productivity, and Caterpillar offers certified operator training classes to help maximize the return on your investment. Maintenance Services Repair option programs guarantee the cost of repairs up front. Diagnostic programs such as Scheduled Oil Sampling, Coolant Sampling and Technical Analysis help you avoid unscheduled repairs. Replacement Repair, rebuild, or replace? Your Cat dealer can help you evaluate the cost involved so you can make the right choice. Complete Customer Support Cat® dealer services help you operate longer with lower costs. » Learn More

Standard / Optional Equip.

321D LCR Standard Equipment

Electrical

50 Ampere alternator

Base machine light (frame)

Horn

Pre-start monitoring system - checks for low fluids

Operator Environment (Mandatory Attachment)

Air conditioner, heater, defroster with automatic climate control

AM/FM Radio with antenna and 2 speakers

Ashtray with 24 volt lighter

Beverage/cup holder

Bolt-on Falling object Guarding System (FOGS) capability

Cab Glass Openable and retractable two- piece front windshield Sky-light, pop-up, polycarbonate

Coat hook

Floor mat

Instrument panel and gauges

Joysticks, console mounted, pilot operated

Light, interior

Literature compartment

Monitor, full graphic color display

Neutral lever (lock out) for all controls

Polycarbonate side windows

Positive filtered ventilation

Pressurized cab

Seat, suspension, with high back and head rest

Seat belt, retractable – 76 mm (3 in)

Storage compartment suitable for lunch box cooler

Sun shade (for skylight)

Travel control pedals with removable hand levers

Windows, Polycarbonate (mandatory attachment)

Windshield wiper and washer (upper and lower)

Engine/Power Train

C6.4 with ACERT™ Technology

Automatic engine speed control with one touch low idle

Cooling

Priming pump

Straight line travel

Two-speed auto-shift travel

Water separator in fuel line

Undercarriage

Grease lubricated track

Hydraulic track adjusters

Idler and center section track guards

Long undercarriage

Other Standard Equipment

Automatic swing parking brake

Auxiliary hydraulic valve

Capability of stackable valves (max of 3) for main valve

Capability of auxiliary circuit

Counterweight with lifting eyes

Door locks, cap locks and Caterpillar® one key security system

Fine swing control

Fully pressurized hydraulic system

Heavy lift

Mirrors (frame-right, cab left)

S•O•SSM quick sampling valves for engine and hydraulic oil

Wave fin radiator

Wiring provision for Product Link

321D LCR Optional Equipment

Front Linkage

Booms

Sticks

Bucket Linkage

Boom Lowering Control Device

Electrical

Light, Boom - Right side

Lights, Cab mounted (2)

Machine Security System (MSS)

Power supply (12V-5 AMP)

Product Link (PL121SR/PL321SR

Travel Alarm (Mandatory attachment)

Guarding

Falling Object Guarding System (FOGS)

Front windshield guard

Heavy-duty bottom guards

Track guiding guards

Vandalism guards

Operator Environment

Hand control pattern changer (ISO-SAE)

Rear window, secondary exit

Seat, high back with air suspension and heater

Engine/Power Train

Starting, Cold weather package

Water level indicator (Fuel)

Undercarriage

Track shoes

Heavy-duty rollers

Auxiliary Hydraulics

Hammer Circuit

Hydraulic pin grabber quick coupler and controller

Lines for booms and sticks

Thumb Circuit

Tool Control System

Work Tools

Wide offering of buckets, tips and sidecutters