320D LRR Hydraulic Excavator

Increased work tool options, new powerful engine and easier operation lead to increased productivity and lower operating costs.

Download Product Brochure

Engine Model Cat® C6.4 ACERT™
Net Flywheel Power 148 hp (110 kW)
Net Power - ISO 9249 148 hp (110 kW)
Net Power - SAE J1349 148 hp (110 kW)
Net Power - EEC 80/1269 148 hp (110 kW)
Bore 4.02 in (102 mm)
Stroke 5.12 in (130 mm)
Displacement 389 in3 (6.4 L)
Operating Weight 52249 lb (23700 kg)
Operating Weight-Minimum 46755 lb (21210 kg)
Operating Weight-Maximum 55093 lb (24990 kg)
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)
B1 Family Bucket Cylinder - Bore 4.7 in (120 mm)
B1 Family Bucket Cylinder - Stroke 43.5 in (1104 mm)
Maximum Drawbar Pull 46311 lb (206 kN)
Maximum Travel Speed 3.5 mph (5.7 km/h)
Number of Shoes Each Side - Long Undercarriage 49
Number of Track Rollers Each Side - Long Undercarriage 8
Number of Carrier Rollers Each Side - Long Undercarriage 2
Fuel Tank Capacity 77 gal (290 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) 56 gal (211 L)
Hydraulic Tank (Including suction pipe) 41 gal (155 L)
Performance ANSI/SAE J1166 APR 90
Brakes SAE J1026 APR90
Cab/FOGS SAE J1356 FEB88
Swing Speed 11.5 RPM (11.5 RPM)
Swing Torque 45612 lb ft (61.8 kN·m)
Transport width 125.2 in (3180 mm)
  • Imageservlet?imageid=c208515&imagetype=1

    Reduced Radius

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

    • 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.

    • Imageservlet?imageid=c633304&imagetype=1


      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.

  • Imageservlet?imageid=c184461&imagetype=1

    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.

    • Imageservlet?imageid=c633049&imagetype=1

      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.

    • Imageservlet?imageid=c195883&imagetype=1

      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.

    • 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.

  • Imageservlet?imageid=c207320&imagetype=1


    Cat® hydraulics deliver power and precise control to keep material moving.

    • Imageservlet?imageid=c633279&imagetype=1

      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.

    • Imageservlet?imageid=c631885&imagetype=1

      System Pressure

      System pressure has been increased to 35 000 kPa (5076 psi), which attributes to improved performance: <ul><li> Increased stick and bucket forces (up 7% higher than the 320C LU) to better handle those tight digging conditions</li><li> 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</li><li> More lift capacity, generally over the front where you are generally hydraulically limited</li></ul>

    • Heavy Lift

      The 320D LRR 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.

    • Imageservlet?imageid=c205712&imagetype=1

      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.

    • Imageservlet?imageid=c203056&imagetype=1


      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.

  • Imageservlet?imageid=c206975&imagetype=1

    Operator Comfort

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

    • Operator Station

      The layout of the interior has been redesigned to maximize operator comfort and reduce operator fatigue. <ul><li> Frequently used switches have been relocated for easier access.</li><li> Consoles and armrests have been redesigned for better comfort and adjustability.</li><li> More seat options - choose from the standard mechanical suspension seat, or the optional air suspension seat with heater. Both provide excellent comfort.</li></ul>

    • Imageservlet?imageid=c343004&imagetype=1

      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.

    • Imageservlet?imageid=c154130&imagetype=1

      Hydraulic Activation Control Lever

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

    • Imageservlet?imageid=c092235&imagetype=1

      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.

  • Imageservlet?imageid=c200515&imagetype=1


    320D LRR 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. <ul><li> Rollers and idlers are sealed and lubricated to extend service life.</li><li> 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.</li><li> 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.</li></ul>

  • Imageservlet?imageid=c203943&imagetype=1

    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.

    • Front Linkage Options

      The Reach Boom allows excellent all-around versatility and a large working envelope. It can be equipped with the following three sticks: <ul><li> R3.9B1 - offers maximum reach and digging depth</li><li> R2.9B1 - performs well in a mid-range working envelope</li><li> R2.5B1 - a good match when the job requires a larger bucket or a hammer</li></ul>

  • Imageservlet?imageid=c200521&imagetype=1

    Work Tools - Attachments

    The 320D LRR has an extensive selection of work tools to optimize machine performance.

    • Imageservlet?imageid=c028787&imagetype=1

      Wide Variety of Work Tools

      Caterpillar offers a complete line of work tools to match all of your application needs: <ul><li> Hammers - matched to Cat machines for optimum performance</li><li> Thumbs, Stiff Link, Full Rotation - transforms your 320D LRR into a versatile material handling machine</li><li> Grapples - choose from a large variety of grapples that best suit your application</li><li> Multi-processors - does the work of many types of demolition tools by use of interchangeable jaws</li><li> Shears - features 360 degree rotation and high force to weight ratio</li><li> Pulverizers - ideally suited for rapid, non-explosive demolition applications</li><li> Vibratory Plate Compactors - provide superior compaction force in a reliable, low maintenance package</li><li> Rippers - perfectly suited for trenching and pipeline applications where conditions aren't favorable to traditional ripping methods</li></ul>

    • Caterpillar Buckets

      The most extensive choice of buckets that can optimize machine performance and match your application needs. <ul><li> General Purpose Buckets - for digging in low impact, moderately abrasive materials such as dirt, loam, gravel and clay.</li><li> Heavy-Duty Buckets - for use in abrasive applications such as mixed dirt, clay and rock.</li><li> 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.</li><li> Ditch Cleaning Buckets - wide and shallow for ditch cleaning, bank forming and finishing.</li></ul>

    • 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.

    • Imageservlet?imageid=c017125&imagetype=1


      Multiply the versatility and utility of 320D LRR. <ul><li> 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.</li><li> Dedicated Coupler - no loss of tip radius, maximizing the breakout forces on your 320D.</li></ul>

    • Imageservlet?imageid=c060889&imagetype=1

      Machine Security

      An optional Machine Security System is available from the factory on the 320D LRR. This system controls when the machine can be operated and utilizes specific keys to prevent unauthorized machine use, a significant theft deterrent.

    • Imageservlet?imageid=c028786&imagetype=1

      Product Link

      PL321 is standard from the factory and includes the following features: <ul><li> Engine hours</li><li> Machine location</li><li> Time based fences (when the machines can operate)</li><li> Geo-based fences (boundaries that the machine can operate)</li><li> Health Watch ° Codes from on-board EDM's/Sensors ° Estimated Fuel Consumption ° Fuel Watch</li><li> Maintenance Watch </li></ul> ° Preventative Maintenance Planning ° Preventative Maintenance Checklists ° Overdue PM Notification ° PM History Recording

    • More Attachments

      The 320D LRR 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 320D LRR offers more options.

    • Extended Service Interval

      320D LRR service and maintenance intervals have been extended to reduce machine service time and increase machine availability.

  • Imageservlet?imageid=c200514&imagetype=1


    A wide variety of optional factory-installed attachments are available to enhance performance and improve job site management.

    • Auxiliary Hydraulic Options

      Allows you to configure your 320D LRR to meet your work tools needs, while increasing its versatility. <ul><li> Single Function Circuit - suited for tools that require one-way flow with both pumps, such as hammers, vibratory plate compactors.</li><li> Double Function Circuit - suited for tools that require two-way flow, utilizing one pump, such as thumbs or non-rotation grapples or shears.</li><li> Tool Control System - accommodates single or double function tools, as well as rotating tools when equipped with medium pressure. </li></ul> – 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.

  • Imageservlet?imageid=c060889&imagetype=1

    Service and Maintenance

    Simplified service and maintenance features save you time and money.

    • Imageservlet?imageid=c343334&imagetype=1

      Ground Level Service

      The design and layout of the 320D LRR 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.

    • Imageservlet?imageid=c343334&imagetype=1

      Air Filter/Radiator Compartment

      The left rear service door allows easy access to the engine radiator, oil cooler and air-to-air-after-cooler. A wire mesh screen is provided between the aftercooler and radiator/oil cooler, where there is a wide 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. The air filter, the access point for the washer tank, and maintenance points for electric components, such as the battery, circuit breaker and controller, are positioned behind the cab, in the air cleaner compartment. The jump-start receptacle, which is an attachment, is near the battery. When equipped, the hand control pattern changer is located within this compartment.

    • Pump Compartment

      A service door on the right side allows for ground level access to the hydraulic pump, case drain and pilot filters.

    • Imageservlet?imageid=c200524&imagetype=1

      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.

    • Imageservlet?imageid=c200518&imagetype=1

      Diagnostics and Monitoring

      The 320D LRR 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.

  • Imageservlet?imageid=c444463&imagetype=1

    Complete Customer Support

    Cat® dealer services help you operate longer with lower costs.

    • 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.

    • Imageservlet?imageid=c324639&imagetype=1

      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.

  • Imageservlet?imageid=c195751&imagetype=2

    Complete Customer Support

    Cat® dealer services help you operate longer with lower costs.

    • Imageservlet?imageid=c200518&imagetype=2


      Repair, rebuild, or replace? Your Cat dealer can help you evaluate the cost involved so you can make the right choice.

Standard Equipment

  • Electrical
    • 50 Ampere alternator
    • Base machine light (frame)
    • Horn
    • Pre-start monitoring system - checks for low fluids
  • Operator Environment
    • 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
    • Electric 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

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-7 AMP)
    • Product Link (PL121SR/PL321SR
    • Travel Alarm (Mandatory attachment)
  • Guarding
    • Falling Object Guarding System (FOGS)
    • Front windshield guard
    • Heavy-duty bottom guards
    • Rubber bumpers (Side)
    • Track guiding guards
    • Vandalism guards
  • Operator Environment
    • Hand control pattern changer (ISO-SAE)
    • Rear window, secondary exit
    • Sunscreen - roller type
    • Seat, high back with air suspension and heater
    • Third pedal, straight travel
    • Wiper, Lower windshield
    • Washer, windshield
  • Engine/Power Train
    • High ambient cooling
    • Prefilter, air
    • Starting, Cold weather package
    • Water level indicator (Fuel)
  • Undercarriage
    • Track shoes
  • Auxiliary Hydraulics
    • Hammer Circuit
    • Thumb Circuit
    • Tool Control System
    • Hydraulic pin grabber quick coupler and controller
    • Lines for booms and sticks
  • Work Tools
    • Wide offering of buckets, tips and sidecutters