AEHQ6092, 321D LCR Hydraulic Excavator Specalog · Compact Radius. The 321D LCR features a compact radius design, which makes it ideal for working in space restricted areas such as:

®®

EngineEngine Model Cat® C6.4 ACERT™ Net Flywheel Power 110 kW 148 hp

WeightsOperating Weight – 23 710 kg 52,271 lbLong Undercarriage

• Reach boom, R2.9B1 (9 ft 6 in) Stick, 0.9 m3 (1.18 yd3)Bucket, 600 mm (24 in) Shoes

Operating Weight – 24 360 kg 53,704 lbLong Undercarriage 2

• Reach boom, R2.9B1 (9 ft 6 in) Stick, 0.9 m3 (1.18 yd3)Bucket, 790 mm (31 in) Shoes

321D LCRHydraulic Excavator

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321D LCR Hydraulic ExcavatorThe D Series incorporates innovations for improved performance and versatility.

The Caterpillar 321D LCR excavatorprovides all the elements to give you thelowest cost to own and operate. At the endof the day, it all comes down to how muchwork you got done and how much did it costyou. Caterpillar and the 321D LCR offeryou the tools to help lower your owningand operating costs.

Versatility

Caterpillar offers a wide variety offactory-installed attachments thatenhance performance and job sitemanagement. pg. 12

Hydraulics

The hydraulic system has been designedto provide reliability and outstandingcontrollability. An optional ToolControl System provides enhancedflexibility. pg. 6

C6.4 with ACERT™ Technology

ACERT™ Technology works at thepoint of combustion to optimize engineperformance and provide low exhaustemissions to meet U.S. EPA Tier 3emission regulations, with exceptionalperformance capabilities and provenreliability. pg. 5

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Compact Radius

The 321D LCR is a “Compact Radius”machine developed so that it can workin the narrow job-site. The cylindricalupper frame and cylindrical operatorstation, allow the 321D LCR to rotatein the narrower job-sites. pg. 4

Work Tools – Attachments

A variety of work tools, includingbuckets, couplers, hammers, and shearsare available through Cat® Work Tools.pg. 11

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✔ New Feature

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Complete Customer Support

Your Cat® dealer offers a wide rangeof services that can be set up under acustomer support agreement when youpurchase your equipment. The dealerwill help you choose a plan that can covereverything from machine configurationto eventual replacement. pg. 14

Service and Maintenance

Fast, easy service has been designedin with extended service intervals,advanced filtration, convenient filteraccess and user-friendly electronicdiagnostics for increased productivityand reduced maintenance costs. pg. 13

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Booms, Sticks and Bucket Linkages

The bucket linkage pins on the massexcavation configuration have beenenlarged to improve reliability anddurability. pg. 10

Operator Comfort

A ROPS cab provides maximum space,wider visibility and easy access toswitches. The monitor is a full-colorgraphical display that allows the operatorto understand the machine informationeasily. Overall, the new ROPS cabprovides a comfortable environmentfor the operator. pg. 8

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Structures

Caterpillar® design and manufacturingtechniques assure outstanding durabilityand service life from these importantcomponents. pg. 7

Compact Radius. The 321D LCR featuresa compact radius design, which makesit ideal for working in space restrictedareas such as: close to buildings, roadconstruction – limiting lane closuresor logging roads. The tail swing isjust 1.68 m (5'6") as compared to the2.75 m (9'0") on the 320D. When rotated90 degrees and working over the side,a minimal amount of counterweightextends beyond the track width.

Operator Confidence. Due to the321D LCR’s compact workingenvelope, operators can workconfidently knowing that thecounterweight will not swinginto any object behind them.

Comfort. The cab on the 321D LCR isa comfortable place to work, with lowsound levels, good visibility andconvenient access to switches andcontrols. The 321D LCR cab offersmany of the same amenities andoptions found in the cab of the320D/320D LRR.

Working Envelope. To further minimizethe working envelope, the boom isrepositioning more towards the centerof the machine as compared to astandard excavator. This reduced thefront swing radius when the boom ispulled all the way up and the stickbrought in completely. This designalso increases the lift capacity of the321D LCR over the front as it has abetter mechanical advantage whencompared to a standard excavator.

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Compact RadiusThe 321D LCR delivers exceptional performance and comfort.

Cat C6.4. The Cat C6.4 with ACERT™Technology introduces a series ofevolutionary, incremental improvementsthat provide breakthrough enginetechnology. The building blocks ofACERT Technology are fuel delivery,air management and electronic control.ACERT Technology optimizes engineperformance while meeting U.S. EPATier 3 emission regulations. With itsproven technology, robust componentsand precision manufacturing, you cancount on this engine to power up at starttime and keep working productively allshift long.

Performance. The 321D LCR, equippedwith the C6.4 engine with ACERT™Technology, provides 7% more poweras compared to the 3066 TA in the321C LCR. The additional powerdelivers a speed and efficiency advantagein high production applications.

Automatic Engine Speed Control.The two-stage, one-touch controlmaximizes fuel efficiency and reducessound levels.

ADEM™ A4 Engine Controller.The ADEM A4 electronic control modulemanages fuel delivery to get the bestperformance per liter of fuel used.The engine management system providesflexible fuel mapping, allowing theengine to respond quickly to varyingapplication needs. It tracks engine andmachine conditions while keeping theengine operating at peak efficiency.

Electronic Control Module.The Electronic Control Module (ECM)works as the “brain” of the engine’scontrol system, responding quickly tooperating variables to maximize engineefficiency. Fully integrated with sensorsin the engine’s fuel, air, coolant, andexhaust systems, the ECM stores andrelays information on conditions suchas rpm, fuel consumption, anddiagnostic information.

Fuel Delivery. The Cat C6.4 featureselectronic controls that govern the fuelinjection system. Multiple injectionfuel delivery involves a high degreeof precision. Precisely shaping thecombustion cycle lowers combustionchamber temperatures, generatingfewer emissions and optimizing fuelcombustion. This translates into morework output for your fuel cost.

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C6.4 with ACERT™ TechnologyThe Cat® C6.4 gives the 321D LCR exceptional power and fuel efficiency unmatched in theindustry for consistently high performance in all applications.

Component Layout. To optimizeefficiency of hydraulic performance,the hydraulic components are locatedclose together, which reduces frictionloss and pressure drops in the lines.

System Pressure. System pressure hasbeen increased to 35 000 kPa (5,076 psi),which attributes to improvedperformance:

• Increased stick and bucket forces(up 7% higher than the 321C LCR)to better handle those tight diggingconditions

• More drawbar pull (206 kN/46,322 lb)to provide more ability to climbslopes, easier spot turns andimproved travel in poor underfootconditions

• More lift capacity, generally overthe front where you are generallyhydraulically limited

Heavy Lift. The 321D LCR features theaddition of a heavy lift, which increasessystem pressure to 36 000 kPa (5,220 psi),giving even more lift capacity overthe front. Heavy Lift is activated bedepressing the soft switch on the righthand console. As the pressure increases,the engine speed is reduced, which allowsbetter control while lifting objects.

Pilot System. The pilot pump isindependent from the main pumps andcontrols the front linkage, swing andtravel operations.

Hydraulic Cross Sensing System.The hydraulic cross sensing systemutilizes each of two hydraulic pumps to100 percent of engine power, under alloperating conditions. This improvesproductivity with faster implementspeeds and quicker, stronger pivot turns.

Boom and Stick Regeneration Circuit.Boom and stick regeneration circuitsaves energy during boom-down andstick-in operation which increasesefficiency, reduces cycle times andpressure loss for higher productivity,lower operating costs and increasedfuel efficiency.

Auxiliary Hydraulic Valve. The auxiliaryvalve is standard on the 321D LCR.Control Circuits are available asattachments, allowing for operation ofhigh and medium pressure tools such asshears, grapples, hammers, pulverizers,multi-processors and vibratory platecompactors.

Hydraulic Cylinder Snubbers.Snubbers are located at the rod-end ofthe boom cylinders and both ends of thestick cylinders to cushion shocks whilereducing sound levels and extendingcomponent life.

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

Robust Undercarriage. A solidfoundation built tough to absorb thestresses of everyday work.

• Rollers and idlers are sealed andlubricated to extend service life.

• Track links are assembled and sealedwith grease to decrease internalbushing wear and increase life byas much as 25%, when comparedto dry seal undercarriages.

• Spring recoil system stroke has beenincreased to better relieve excesstrack tension, which can occur whenmaterial builds up between the trackand sprocket.

Rugged Structures. Structuralcomponents and the undercarriageare the backbone of the machine’sdurability. Caterpillar places a lot ofemphasis on the machine’s durabilityduring the designing and manufacturingof its excavators.

• Up to 95% of the structural weldsare welded by robots, which achieveup to three times the penetration of amanual weld and improving overalldurability of the machine.

• The 321D LCR’s main frameutilizes high-tensile strength steeland a one-piece swing table, whichimproves strength and reliability.

• The carbody has a X-shaped, boxsection design to resist bending andtwisting forces.

• Track roller frames are press-formedin a pentagonal shape for additionalstrength.

Engine Hood. The 321D LCR features aone-piece, flat engine hood. The enginehood opens backwards and is located ina place that does not obstruct access toinspection points in the enginecompartment.

Counterweight. The counterweightis split into two pieces for improvedserviceability. The top piece weighsapproximately 2268 kg (5,000 lb), andthe bottom weighs 3832 kg (8,450 lb).The counterweight is a rounded caststructure that minimizes the amountof overhang.

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Structures321D LCR is designed to handle the most rugged operating conditions, while providing longlife and value.

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

Operator Comfort

Operator Station. The layout of theinterior has been redesigned tomaximize operator comfort andreduce operator fatigue.

• Frequently used switches havebeen relocated for easier access.

• Consoles and armrests have beenredesigned for better comfort andadjustability.

• More seat options – choose fromthe standard mechanical suspensionseat, or the optional air suspensionseat with heater. Both provideexcellent comfort.

Standard Cab Equipment. To enhanceoperator comfort and productivity,the cab includes a lighter, drink holder,coat hook, service meter, literatureholder, magazine rack and storagecompartment.

Joystick Control. Joystick controls havelow lever effort and are designed tomatch the operator’s natural wrist andarm position.

Hydraulic Activation Control Lever.For added safety, this lever must bein the operate position to activate themachine control functions.

Climate Control. Climate control adjuststemperature and flow, and determineswhich air outlet is best in each situationwith a touch of a button.

ROPS Certified Operator Station.Features a new ROPS (Roll OverProtective Structure) compliant cabstructure as standard with 10% improvedvisibility and more head room spaceover previous non-ROPS cab.

The cab air filter is now located onthe side of the cab and is accessibleat ground level.

This design also allows for a FallingObject Guard System (FOGS) or frontwindshield guard to be bolted directlyto the cab, either at the factory or in thefield, enabling the machine to meet alljob site requirements.

Hand Control Pattern Changer(Optional). Switches the joystickpattern between ISO and SAE patterns.For easy access, the pattern changer islocated in the cab, underneath the floormat. In order to change positions, simplyremove the bolt, slide the lever into theappropriate location, then secure the bolt.

Sliding Door. The cab door slidesalongside the cab and takes less spaceto open and close than a hinged door.This unique design allows the operatorto easily get in and out of the cab whenworking next to objects or walls.

Skylight. An enlarged skylight withsunshade provides excellent visibilityand ventilation.

Monitor. The monitor is a full colorLiquid Crystal Display that givesyou vital operating and performanceinformation, alerts in text, all in asimple, east to navigate format.

Default Display. Three analog gauges,fuel level, hydraulic oil temperatureand coolant temperature, are displayedin this area.

Main Menu. Four menu optionsto choose from:

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

Maintenance – Displays serviceintervals and hours accumulated sincelast serviced.

Performance – Displays machineperformance attributes such as EngineSpeed, Coolant and Hydraulic OilTemperature.

Service – Allows access to machineparameters for service intervals,diagnostic information and informationrelated to the machines software.

Event Display. Machine information isdisplayed in this area with the icon andlanguage.

Multi-information Display. This areais reserved for displaying variousinformation which is convenient for theoperator. The “CAT” logo is displayedwhen no information is available to bedisplayed.

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Front Linkage Options. The Reach Boomallows excellent all-around versatilityand a large working envelope. It can beequipped with the following two sticks:

• R2.9B1 – performs well in a mid-range working envelope

• R2.5B1 – a good match when the jobrequires a larger bucket or a hammer

Bucket Linkage. The power linkimproves durability, increases machine-lifting capability in key lifting positionsand with the integrated lift-eye it iseasier to use than compared to theprevious power link. The lift eye alsogives you the optimum lift performance.It allows you to lower the load point,which maximizes the use of the boomcylinders.

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Booms, Sticks and Bucket LinkagesBuilt 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.

Wide Variety of Work Tools. Caterpillaroffers a complete line of work tools tomatch all of your application needs:

• Hammers – matched to Catmachines for optimum performance

• Thumbs, Stiff Link, Full Rotation –transforms your 321D LCR into aversatile material handling machine

• Grapples – choose from a largevariety of grapples that best suityour application

• Multi-processors – does the workof many types of demolition toolsby use of interchangeable jaws

• Shears – features 360 degreerotation and high force to weightratio

• Pulverizers – ideally suited forrapid, non-explosive demolitionapplications

• Vibratory Plate Compactors – providesuperior compaction force in areliable, low maintenance package

• Rippers – perfectly suited fortrenching and pipeline applicationswhere conditions aren’t favorableto traditional ripping methods

Caterpillar Buckets. The most extensivechoice of buckets that can optimizemachine performance and match yourapplication needs.

• General Purpose Buckets – fordigging in low impact, moderatelyabrasive materials such as dirt, loam,gravel and clay.

• Heavy-Duty Buckets – for use inabrasive applications such as mixeddirt, clay and rock.

• Heavy-Duty power Buckets – foruse in abrasive applications wherebreakout force and cycle times arecritical – good for materials suchas mixed dirt, clay and rock.

• Ditch Cleaning Buckets – wide andshallow for ditch cleaning, bankforming and finishing.

Caterpillar Ground Engaging Tools(GET). Choose from a wide variety oftips that maximize bucket and machineperformance. Sidecutters and sidebarprotectors are also available.

Pin Grabber Plus Hydraulic Pin Grabber

Couplers. Multiply the versatility andutility of 321D LCR.

• Hydraulic Pin Grabber Plus – allowsquick and easy tool changes withouthaving to leave the cab. Picks up alarge variety of tools equipped withstandard pins.

• Dedicated Coupler – no loss of tipradius, maximizing the breakoutforces on your 321D LCR.

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Work Tools – AttachmentsThe 321D LCR has an extensive selection of work tools to optimize machine performance.

Auxiliary Hydraulic Options. Allowsyou to configure your 321D LCR tomeet your work tools needs, whileincreasing its versatility.

• Single Function Circuit – suited fortools that require one-way flow withboth pumps, such as hammers,vibratory plate compactors.

• Double Function Circuit – suited fortools that require two-way flow,utilizing one pump, such as thumbsor non-rotation grapples or shears.

• Tool Control System

– Accommodates single or doublefunction tools, as well as rotating toolswhen equipped with medium pressure.

– Stores pressure and flow informationfor up to 10 tools

– Cat tools selectable that have presetflows and pressures

– Shortcut button on right hand console,making tool selection easier.

Product Link. Both the PL121 andPL321 are available as factory installedattachments. PL121 gives you AssetWatch, which includes the followingfeatures:

• Engine hours

• Machine location

• Time based fences (when themachines can operate)

• Geo-based fences (boundaries thatthe machine can operate) PL321gives you all of the features listedfor PL121, plus the ability to includeHealth and Maintenance Watch.

• Health Watch

° Codes from on-boardEDM’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 MachineSecurity System is available from thefactory on the 321D LCR. This systemcontrols when the machine can beoperated and utilizes specific keysto prevent unauthorized machine use,a significant theft deterrent.

More Attachments. The 321D LCRoffers the most options available toequip your machine to best match yourapplication and work environmentrequirements. From track shoe sizeto guarding packages to operatorcomfort options, the 321D LCRoffers more options.

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VersatilityA wide variety of optional factory-installed attachments are available to enhanceperformance and improve job site management.

Ground Level Service. The design andlayout of the 321D LCR was madewith the service technician in mind.Many service locations are easilyaccessible at ground level allowingcritical maintenance to get done quicklyand efficiently.

Air Filter/Radiator Compartment.The left rear service door allows easyaccess to the engine radiator, oil coolerand air-to-air-aftercooler.

A wire mesh screen is provided betweenthe aftercooler and radiator/oil cooler,where these is enough clearance to blowoff debris using a wand. The air filter,also located within this compartment,features a double-element constructionfor superior cleaning efficiency.When the air cleaner plugs, a warningis displayed on the monitor screeninside the cab.

Access to the washer tank andmaintenance points for the electriccomponents, such as the battery, circuitbreaker and controller are also locatedin this compartment. The jump-startreceptacle, which is an attachment forthe cold weather package, is locatednear the battery.

Pump Compartment. A service door onthe right side allows for ground levelaccess to the hydraulic pump, case drainand pilot filters.

Greasing Points. A concentrated remotegreasing block on the boom deliversgrease to hard-to-reach locations onthe front.

Anti-Skid Plate. Anti-skid plate coverstop of storage box and upper structureto prevent slipping during maintenance.

Diagnostics and Monitoring.The 321D LCR is equipped with S•O•SSM

sampling ports and hydraulic test portsfor the hydraulic system, engine oil,and for coolant. A test connection forthe Cat Electronic Technician (Cat ET)service tool is located in the cab.

Extended Service Interval. 321D LCRservice and maintenance intervalshave been extended to reduce machineservice time and increase machineavailability.

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Service and MaintenanceSimplified service and maintenance features save you time and money.

Product Support. You will find nearlyall parts at our dealer parts counter.Cat dealers utilize a worldwide computernetwork to find in-stock parts tominimize machine down time.Save money with remanufacturedcomponents.

Machine Selection. Make detailedcomparisons of the machines you areconsidering before you buy. What arethe job requirements, machineattachments and operating hours?What production is needed? Your Catdealer can provide recommendations.

Customer Support Agreements.Cat dealers offer a variety of productsupport agreements, and work withcustomers to develop a plan the bestmeets specific needs. These plans cancover the entire machine, includingattachments, to help protect thecustomer’s investment.

Operation. Improving operatingtechniques can boost your profits.Your Cat dealer has videotapes, literatureand other ideas to help you increaseproductivity, and Caterpillar offerscertified operator training classes tohelp maximize the return on yourinvestment.

Maintenance Services. Repair optionprograms guarantee the cost of repairsup front. Diagnostic programs such asScheduled Oil Sampling, CoolantSampling and Technical Analysishelp you avoid unscheduled repairs.

Replacement. Repair, rebuild, or replace?Your Cat dealer can help you evaluatethe cost involved so you can make theright choice.

SAFETY.CAT.COM™.

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Complete Customer SupportCat® dealer services help you operate longer with lower costs.

15321D LCR Hydraulic Excavator specifications

Swing Mechanism

Swing Speed 11.5 rpmSwing Torque 61.8 kN·m 45,612 lb ft

Drive

Maximum Drawbar Pull 206 kN 46,311 lbMaximum Travel Speed 5.7 km/h 3.5 mph

Hydraulic System

Main Implement System – 205 L/min 54 gal/minMaximum Flow (2x)Max. pressure – Equipment 35 000 kPa 5,076 psiMax. pressure – Equipment – 36 000 kPa 5,221 psiHeavy Max. pressure – Travel 35 000 kPa 5,076 psiMax. pressure – Swing 25 000 kPa 3,626 psiPilot System – Maximum flow 32.4 L/min 9 gal/minPilot System – Maximum 3900 kPa 566 psipressureBoom Cylinder – Bore 120 mm 4.7 inBoom Cylinder – Stroke 1260 mm 49.6 inReach Stick Cylinder – Bore 140 mm 5.5 inReach Stick Cylinder – Stroke 1518 mm 59.8 inB1 Family Bucket Cylinder – 120 mm 4.7 inBoreB1 Family Bucket Cylinder – 1104 mm 43.5 inStroke

Sound Performance

Performance ANSI/SAE J1166 APR 90

• When properly installed and maintained, the cab offeredby Caterpillar, when tested with doors and windows closedaccording to ANSI/SAE J1166 OCT 98, meets OSHA andMSHA requirements for operator sound exposure limitsin effect at time of manufacture.

• Hearing protection may be needed when operating withan open operator station and cab (when not properlymaintained or doors/windows open) for extended periodsor in noisy environment.

Standards

Brakes SAE J1026 APR90Cab/FOGS SAE J1356 FEB88Cab/ROPS ISO 12117-2:2008

Engine

Engine Model Cat® C6.4 ACERT™ Net Flywheel Power 110 kW 148 hpNet Power – ISO 9249 110 kW 148 hpNet Power – SAE J1349 110 kW 148 hpNet Power – EEC 80/1269 110 kW 148 hpBore 102 mm 4.02 inStroke 130 mm 5.12 inDisplacement 6.4 L 389 in3

• The 321D LCR meets U.S. EPA Tier 3 emissions requirements.

• Net flywheel power advertised is the power available at theflywheel when the engine is equipped with fan, air cleaner,muffler and alternator.

• No engine power derated below 2300 m (7,500 ft).

Weights

Operating Weight – Long 23 710 kg 52,271 lbUndercarriageOperating Weight – Long 24 360 kg 53,704 lbUndercarriage 2

• Reach boom, R2.9B1 (9 ft 6 in) Stick, 0.9 m3 (1.18 yd3) Bucket,600 mm (24 in) Shoes

• Reach boom, R2.9B1 (9 ft 6 in) Stick, 0.9 m3 (1.18 yd3) Bucket,790 mm (31 in) Shoes

Service Refill Capacities

Fuel Tank Capacity 330 L 87 galCooling System 25 L 6.6 galEngine Oil 30 L 8 galSwing Drive 8 L 2.1 galFinal Drive (each) 8 L 2.1 galHydraulic System (including tank) 208 L 55 galHydraulic Tank 120 L 32 galHydraulic Tank (Including 133 L 35 galsuction pipe)

Track

Number of Shoes Each Side – 49Long UndercarriageNumber of Track Rollers Each 8Side – Long UndercarriageNumber of Carrier Rollers Each 2Side – Long Undercarriage

16 321D LCR Hydraulic Excavator specifications

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DimensionsAll dimensions are approximate.

Boom Options Reach — Reach — 5.68 m (18'7") Stick 5.68 m (18'7") Stick

Stick Options R2.9B1 m (9'7") Std/SA R2.5B1 m (8'2") Std/SA1 Shipping Height 3030 mm (9'11") 3030 mm (9'11")2 Shipping Length 8880 mm (29'2") 8880 mm (29'2")3 Tail Swing Radius 1676 mm (5'6") 1676 mm (5'6")4 Length to Center of Rollers

Long 3650 mm (12'0") 3650 mm (12'0")5 Track Length

Long 4455 mm (14'7") 4455 mm (14'7")6 Ground Clearance 450 mm (1'6") 450 mm (1'6")7 Track Gauge

Long 2380 mm (7'10") 2380 mm (7'10")8 Transport Width 790 mm Shoes 600 mm Shoes

Long 3180 mm (10'5") 2980 mm (9'9")9 Cab Height 2980 mm (9'9") 2980 mm (9'9")

Note: All numbers are approximate


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2.9 m (9'7")

2.5 m (8'2")Pin Grabber

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Reach Reach Reach Reach5.68 m (18'7") 5.68 m (18'7") 5.68 m (18'7") 5.68 m (18'7")

Stick Length R2.9B1 m (9'7") R2.5B1 m (8'2") R2.9B1 m (9'7") R2.5B1 m (8'2")Bucket 1.0 m3 (1.31 yd3) 1.0 m3 (1.31 yd3) Pin Grabber Pin Grabber

Quick Coupler with Quick Coupler with1.0 m3 (1.31 yd3) 1.0 m3 (1.31 yd3)

1 Maximum Reach @ 9790 mm (32'1") 9390 mm (30'10") 10 050 mm (33'0") 9650 mm (31'8")Ground Level

2 Maximum Digging Depth 6710 mm (22'0") 6290 mm (20'8") 6970 mm (22'10") 6550 mm (21'6")3 Minimum Loading Height 2960 mm (9'9") 3380 mm (11'1") 2710 mm (8'11") 3120 mm (10'3")4 Maximum Loading Height 7890 mm (25'11") 7600 mm (24'11") 7630 mm (25'0") 7340 mm (24'1")5 Maximum Vertical Wall 5890 mm (19'4") 5490 mm (18'0") 5200 mm (17'1") 4810 mm (15'9")

Digging Depth6 Maximum Cutting Height 11 010 mm (36'1") 10 720 mm (35'2") 11 260 mm (36'11") 10 970 mm (35'0")7 Maximum Depth Cut for 6280 mm (20'7") 5880 mm (19'3") 6560 mm (21'6") 6140 mm (20'2")

a 2440 mm (8 ft) Level Bottom8 Minimum Front Swing Radius 2340 mm (7'8") 2280 mm (7'6") 2340 mm (7'8") 2280 mm (7'6")

Working Ranges


General Purpose Buckets R2.9B1 Stick R2.9B1 Stick w/Coupler R2.5B1 Stick R2.5B1 Stick w/CouplerBucket Digging Force (ISO) 140 kN (31,361 lb) 116 kN (26,145 lb) 140 kN (31,361 lb) 116 kN (26,145 lb)

Bucket Digging Force (SAE) 125 kN (28,079 lb) 108 kN (24,189 lb) 125 kN (28,079 lb) 108 kN (24,189 lb)

Stick Digging Force (ISO) 106 kN (23,897 lb) 100 kN (22,436 lb) 118 kN (26,460 lb) 110 kN (24,706 lb)

Stick Digging Force (SAE) 103 kN (23,223 lb) 98 kN (22,009 lb) 114 kN (25,628 lb) 107 kN (24,144 lb)

Power Buckets R2.9B1 Stick R2.9B1 Stick w/Coupler R2.5B1 Stick R2.5B1 Stick w/CouplerBucket Digging Force (ISO) 163 kN (36,711 lb) 124 kN (27,809 lb) 163 kN (36,711 lb) 124 kN (27,809 lb)




Heavy Duty/Rock Buckets R2.9B1 Stick R2.9B1 Stick w/Coupler R2.5B1 Stick R2.5B1 Stick w/CouplerBucket Digging Force (ISO) 140 kN (31,563 lb) 117 kN (26,258 lb) 140 kN (31,563 lb) 117 kN (26,258 lb)




Bucket and Stick ForcesBucket and Stick force are calculated with different buckets than those calculated for working range.

Major Component Weights

Base machine with counterweight and shoes (without front linkage)

Long undercarriage with 790 mm shoes 20 380 kg 44,929 lb

Two boom cylinders 344 kg 758 lb

Counterweight 6100 kg 13,448 lb

Boom (includes lines, pins and stick cylinder)

Reach boom 5.68 m (18'7") 1660 kg 3,660 lb

Stick (includes lines, pins, bucket cylinder and linkage)

R2.9B1 (9'7") 970 kg 2,138 lb

R2.5B1 (8'2") 940 kg 2,072 lb

Undercarriage [includes carbody, swing bearing, trackframe, rollers, idlers, steps, guards, final drive]

L undercarriage with 790 mm shoes 7850 kg 17,306 lb

All weights are approximate.


321D LCR Bucket Options

Weight Adapter Capacity* Width Tip Radius (without tips) Teeth

R2.9B1 R2.5B1m3 yd3 mm in mm in kg lb Qty R2.9B1 w/QC R2.5B1 w/QC

B FamilyGeneral Purpose K80 0.55 0.72 610 24 1565 61.6 629 1,387 3 s s s s

(GP) K80 0.75 0.98 762 30 1565 61.6 718 1,583 4 s s s s

K80 0.95 1.24 914 36 1565 61.6 790 1,742 5 s s s s

K80 1.17 1.53 1067 42 1565 61.6 852 1,878 5 n n s n

K80 1.39 1.82 1219 48 1565 61.6 926 2,041 6 * * n *

K80 1.57 2.05 1372 54 1565 61.6 1000 2,205 6 j j * j

Heavy Duty (HD) K90 0.47 0.61 610 24 1578 62.1 650 1,433 3 s s s s

K90 0.64 0.84 762 30 1578 62.1 743 1,638 4 s s s s

K90 0.82 1.07 914 36 1578 62.1 813 1,792 5 s s s s

K90 1.00 1.31 1067 42 1578 62.1 866 1,909 5 s s s s

K90 1.19 1.56 1219 48 1578 62.1 956 2,108 6 n * s n

K90 1.38 1.80 1372 54 1578 62.1 1030 2,271 6 * j n *

Heavy Duty K90 0.54 0.70 610 24 1578 62.1 696 1,534 3 s s s s

Rock (HDR) K90 0.77 1.00 762 30 1578 62.1 781 1,722 4 s s s s

K90 0.84 1.10 914 36 1578 62.1 863 1,903 5 s s s s

K90 1.07 1.40 1067 42 1578 62.1 933 2,057 5 s n s s

Heavy Duty K90 0.79 1.03 914 36 1458 57.4 811 1,788 5 s s s s

Power (HDP) K90 0.96 1.26 1067 42 1458 57.4 875 1,929 5 s s s s

K90 1.14 1.49 1219 48 1458 57.4 954 2,103 6 n n s n

Ditch Cleaning n/a 1.02 1.33 1524 60 1139 44.8 726 1,601 0 s s s s

(DC) n/a 1.24 1.62 1830 72 1139 44.8 823 1,814 0 n n s n

s 2100 kg/m3 (3,500 lb/yd3) max material densityn 1800 kg/m3 (3,000 lb/yd3) max material density* 1500 kg/m3 (2,500 lb/yd3) max material densityj 1200 kg/m3 (2,000 lb/yd3) max material density

Assumptions for maximum material density rating:1. Front Linkage fully extended at ground line2. Machine positioned 90 degrees over the side3. Bucket curled4. 100% Bucket Fill FactorPlease consult with your Cat dealer personnel for optimum selection of buckets and work toolsthat best match your application.* Based on SAE J296, some calculations of capacity specs fall on borderlines. Rounding may

allow two buckets to have the same English rating, but different metric ratings.


321D LCR Work Tool Matching Guide

Boom Options Reach Boom5.68 m (18'7")

Stick Options R2.9B1 R2.5B1(9'7") (8'2")

Hydraulic Hammer H115s/ H115s/H120Cs/ H120Cs/H130s H130s

Vibratory Plate Compactor CVP110 CVP110

Multi-Processor MP15 MP15

360 Scrap Shear S320 S320

Trash Grapple 2.7 m3 (3.5 yd3) 2.7 m3 (3.5 yd3)

Contractor’s Grapple yes yes

Hydraulic Thumb yes yes

Dedicated Quick Coupler yes yes

Pin-Grabber Quick Coupler yes yes


STICK – 2.9 m (9'7")BUCKET – 0.82 m3 (1.07 yd3)

UNDERCARRIAGE – LongSHOES – 790 mm (31") triple grouser

BOOM – 5.68 m (18'7")HEAVY LIFT – On

* Indicates that the load is limited by hydraulic lifting capacity rather than tipping load. The above loads are in compliance with hydraulic excavator lift capacitystandard ISO 10567:2007. They do not exceed 87% of hydraulic lifting capacity or 75% of tipping load. Weight of all lifting accessories must be deducted fromthe above lifting capacities. Lifting capacities are based on the machine standing on a firm, uniform supporting surface.

1.5 m (5.0 ft) 3.0 m (10.0 ft) 4.5 m (15.0 ft) 6.0 m (20.0 ft) 7.5 m (25.0 ft)

mft

9.0 m kg *2100 *2100 5.7830.0 ft lb *4,550 *4,550 18.35

7.5 m kg *3600 *3600 *2450 *2450 7.2125.0 ft lb *7,400 *7,400 *5,350 *5,350 23.36

6.0 m kg *5100 *5100 *5000 4800 *3900 3200 *2400 *2400 8.0420.0 ft lb *11,100 *11,100 *10,950 10,300 *7,750 6,850 *5,300 *5,300 26.25

4.5 m kg *7000 *7000 *6600 *6600 *5650 4650 *5200 3100 *2500 2450 8.5115.0 ft lb *14,600 *14,600 *14,150 *14,150 *12,250 10,000 *11,150 6,650 *5,500 5,350 27.86

3.0 m kg *8850 7000 *6650 4400 5200 3000 *2750 2250 8.6910.0 ft lb *19,000 15,050 *14,350 9,450 11,100 6,400 *6,000 4,950 28.49

1.5 m kg *10 850 6450 7300 4150 5050 2900 *2950 2150 8.765.0 ft lb *23,350 13,900 15,650 8,900 10,850 6,150 *6,450 4,750 28.75

Ground kg 11 550 6200 7100 4000 4950 2800 *3250 2200 8.59Line lb 24,700 13,350 15,200 8,550 10,600 5,950 *7,150 4,850 28.17

–1.5 m kg *9450 *9450 *11 250 6150 7000 3900 4900 2750 *3800 2400 8.12–5.0 ft lb *21,550 *21,550 *24,350 13,200 15,050 8,400 10,550 5,850 *8,400 5,300 26.60

–3.0 m kg *13 500 12 700 *10 100 6250 7050 3950 *4850 2900 7.29–10.0 ft lb *29,300 27,200 *21,750 13,400 15,100 8,450 *10,750 6,450 23.82

–4.5 m kg *10 050 *10 050 *7700 6450 *5250 4150 5.95–15.0 ft lb *21,450 *21,450 *16,300 13,850 *11,500 9,400 19.26


Always refer to the appropriate Operation and Maintenance Manual for specific product information.


mft

9.0 m kg *2700 *2700 4.9130.0 ft lb *5,950 *5,950 *5,950 *5,950 15.39

7.5 m kg *3300 *3300 *2950 *2950 6.5825.0 ft lb *7,000 *7,000 *6,450 *6,450 21.26

6.0 m kg *5200 5150 *3150 *3150 *2800 *2800 7.6120.0 ft lb *11,350 11,050 *6,150 *6,150 24.80

4.5 m kg *6500 *6500 *5800 4950 *4950 3450 *2800 *2800 8.2515.0 ft lb *14,050 *14,050 *12,600 10,600 *10,150 7,350 *6,200 *6,200 26.98

3.0 m kg *6750 *6750 *8500 7250 *6750 4650 5500 3300 *2950 2650 8.5710.0 ft lb *15,300 *15,300 *18,350 15,600 *14,600 10,050 11,750 7,050 *6,500 5,800 28.10

1.5 m kg *5450 *5450 *7050 6700 7500 4400 5350 3150 *3250 2550 8.635.0 ft lb *12,000 *12,000 *15,850 14,400 16,150 9,450 11,450 6,750 *7,100 5,550 28.30

Ground kg *4650 *4650 *5500 *5500 *6150 *6150 7300 4200 5200 3050 *3700 2550 8.41Line lb *10,200 *10,200 *12,000 *12,000 *13,650 13,650 15,650 9,000 11,200 6,550 *8,150 5,650 27.60

–1.5 m kg *6800 *6800 *5450 *5450 *6000 *6000 7150 4100 5150 3000 *4600 2800 7.91–5.0 ft lb *14,750 *14,750 *11,950 *11,950 *13,300 *13,300 15,400 8,800 11,050 6,400 *10,100 6,100 25.92

–3.0 m kg *5750 *5750 *5450 *5450 *6200 *6200 7200 4100 5650 3300 7.06–10.0 ft lb *12,550 *12,550 *12,000 *12,000 *13,850 13,400 15,450 8,800 12,550 7,250 23.05

–4.5 m kg *5450 *5450 *5700 *5700 *7050 6400 *6750 4550 5.70–15.0 ft lb *11,950 *11,950 *12,650 *12,650 *15,950 13,800 *14,900 10,250 18.42

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Load atMaximum Reach

Load PointHeight

Load RadiusOver Front

Load RadiusOver Side

Reach Boom Lift Capacities

STICK – 2.9 m (9'7")BUCKET – No Bucket, Bare Quick Coupler



Load at MaximumReach – Coupler Curled

Load PointHeight



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STICK – 2.5 m (8'2")BUCKET – 0.82 m3 (1.07 yd3)





mft

9.0 m kg *2050 *2050 5.1530.0 ft lb

7.5 m kg *3200 *3200 *2650 *2650 6.7025.0 ft lb *5,650 *5,650 21.68

6.0 m kg *5750 *5750 *5450 4750 *2900 *2900 7.6020.0 ft lb *12,500 *12,500 *11,900 10,200 *6,350 *6,350 24.79

4.5 m kg *10 350 *10 350 *7250 *7250 *6050 4600 5250 3050 *3050 2650 8.0915.0 ft lb *21,750 *21,750 *15,550 *15,550 *13,100 9,850 *10,800 6,550 *6,700 5,850 26.50

3.0 m kg *9550 6850 *7000 4350 5150 2950 *3350 2450 8.2810.0 ft lb *20,400 14,700 *15,100 9,300 11,050 6,350 *7,350 5,400 27.16

1.5 m kg *11 250 6350 7250 4100 5050 2850 *3600 2350 8.375.0 ft lb *24,200 13,650 15,550 8,800 10,800 6,100 *7,850 5,150 27.47

Ground kg 11 500 6200 7050 3950 4950 2800 *4000 2400 8.19Line lb 24,600 13,300 15,150 8,500 10,600 5,950 *8,750 5,300 26.86

–1.5 m kg *9650 *9650 *10 950 6200 7000 3900 4950 2750 *4700 2650 7.69–5.0 ft lb *22,350 *22,350 *23,700 13,250 15,050 8,400 *10,300 5,850 25.21

–3.0 m kg *12 200 *12 200 *9500 6300 7100 4000 *5800 3300 6.82–10.0 ft lb *26,450 *26,450 *20,550 13,500 15,250 8,550 *12,700 7,300 22.24

–4.5 m kg *6600 6550 *5150 5000 5.34–15.0 ft lb *13,850 *13,850 *11,150 *11,150 17.22


Always refer to the appropriate Operation and Maintenance Manual for specific product information.


mft

9.0 m kg *2700 *2700 4.1530.0 ft lb

7.5 m kg *3050 *3050 *3000 *3000 6.0425.0 ft lb *7,500 *7,500 *6,550 *6,550 19.44

6.0 m kg *5800 *5800 *5000 *5000 *3300 *3300 7.1520.0 ft lb *12,650 *12,650 *10,300 *10,300 *7,250 *7,250 23.28

4.5 m kg *9250 *9250 *7150 *7150 *6200 4900 *4700 3400 *3350 3150 7.8215.0 ft lb *19,650 *19,650 *15,450 *15,450 *13,500 10,500 *9,050 7,250 *7,300 7,000 25.58

3.0 m kg *5900 *5900 *9100 7100 *7100 4600 5450 3250 *3550 2850 8.1610.0 ft lb *13,300 *13,300 *19,650 15,300 *15,400 9,900 11,700 7,000 *7,750 6,250 26.77

1.5 m kg *5600 *5600 *6650 6600 7450 4350 5300 3150 *3900 2750 8.225.0 ft lb *12,200 *12,200 *14,950 14,200 16,050 9,350 11,400 6,750 *8,550 6,000 26.98

Ground kg *5650 *5650 *5950 *5950 7250 4200 5200 3050 *4550 2800 8.00Line lb *12,350 *12,350 *13,300 *13,300 15,600 9,000 11,200 6,550 *10,050 6,100 26.24

–1.5 m kg *7600 *7600 *5500 *5500 *5950 *5950 7200 4100 5200 3050 7.47–5.0 ft lb *16,400 *16,400 *12,050 *12,050 *13,250 *13,250 15,450 8,850 11,500 6,700 24.46

–3.0 m kg *5800 *5800 *5450 *5450 *6350 6300 7250 4150 6350 3700 6.56–10.0 ft lb *12,650 *12,650 *12,000 *12,000 *14,150 13,550 15,550 8,950 14,100 8,150 21.39

–4.5 m kg *5800 *5800 *7700 6500 *7050 5500 5.06–15.0 ft lb *12,950 *12,950 *17,050 14,050 *15,450 12,450 16.29

Load atMaximum Reach

Load PointHeight



Reach Boom Lift Capacities

STICK – 2.5 m (8'2")BUCKET – No Bucket, Bare Quick Coupler



Load at MaximumReach – Coupler Curled

Load PointHeight



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Standard EquipmentStandard equipment may vary. Consult your Cat dealer for details.

UndercarriageGrease lubricated trackHydraulic track adjustersIdler and center section track guardsLong undercarriage

Other Standard EquipmentAutomatic swing parking brakeAuxiliary hydraulic valveCapability of stackable valves (max of 3) for main valveCapability of auxiliary circuitCounterweight with lifting eyesDoor locks, cap locks and Caterpillar® one key security

systemFine swing controlFully pressurized hydraulic systemHeavy liftMirrors (frame-right, cab left)S•O•SSM quick sampling valves for engine and hydraulic oilWave fin radiatorWiring provision for Product Link

Electrical50 Ampere alternatorBase machine light (frame)HornPre-start monitoring system – checks for low fluids

(engine oil, coolant, hydraulic oil) prior to starting machine

Operator Environment (Mandatory Attachment)Air conditioner, heater, defroster with automatic

climate controlAM/FM Radio with antenna and 2 speakersAshtray with 24 volt lighterBeverage/cup holderBolt-on Falling object Guarding System (FOGS) capabilityCab GlassOpenable and retractable two-piece front windshieldSky-light, pop-up, polycarbonate

Coat hookFloor matInstrument panel and gaugesJoysticks, console mounted, pilot operatedLight, interiorLiterature compartmentMonitor, full graphic color displayNeutral lever (lock out) for all controlsPolycarbonate side windowsPositive filtered ventilationPressurized cabROPS cabSeat, suspension, with high back and head restSeat belt, retractable – 76 mm (3 in)Storage compartment suitable for lunch box coolerSun shade (for skylight)Travel control pedals with removable hand leversWindows, Polycarbonate (mandatory attachment)Windshield wiper and washer (upper and lower)

Engine/Power TrainC6.4 with ACERT™ Technology

Air intake heaterAir-to-air aftercooler (ATAAC)24 volt electric startHEUI™ injectors2300 m (7,500 ft) altitude capability without derate

Automatic engine speed control with one touch low idleCooling

Protection of 43° C (110° F) to –18° C (0° F) at 50% concentration

Priming pumpStraight line travelTwo-speed auto-shift travelWater separator in fuel line

Optional EquipmentOptional equipment may vary. Consult your Cat dealer for details.

UndercarriageTrack shoes

600 mm (24 in) triple grouser700 mm (28 in) triple grouser790 mm (31 in) triple grouser

Heavy-duty rollersAuxiliary Hydraulics

Hammer CircuitFor single function (1 way/2 pump) hydraulic tools

Hydraulic pin grabber quick coupler and controllerLines for booms and sticksThumb Circuit

For double function (2 way/1 pump) hydraulic toolsTool Control System

Capability of adding medium pressureFor single or double function, (1 or 2 way, 1 or 2 pump)

hydraulic toolsHydraulic Pin Grabber Quick Coupler and controllerJoysticks with additional switchesLines for booms and sticksMedium pressure circuit (added to Tool Control only)

for tools requiring medium pressureProgram up to 10 tools in memory

Work ToolsWide offering of buckets, tips and sidecutters

Front LinkageBooms

Reach 5.68 m (18 ft 7 in)Sticks

Reach 2.9 m (9 ft 7 in)Reach 2.5 m (8 ft 2 in)

Bucket LinkageB1 Family

Boom Lowering Control DeviceElectrical

Light, Boom – Right sideLights, Cab mounted (2)Machine Security System (MSS)Power supply (12V-5 AMP)Product Link (PL121SR/PL321SR)Travel Alarm (Mandatory attachment)

GuardingFalling Object Guarding System (FOGS)Front windshield guard

Full length, wire meshHeavy-duty bottom guardsTrack guiding guards

Sprocket end, idler end guardTwo-piece full length (center guard removed)

Vandalism guardsOperator Environment

Hand control pattern changer (ISO-SAE)Rear window, secondary exitSeat, high back with air suspension and heater

Engine/Power TrainStarting, Cold weather package

Two additional maintenance free batteriesHigh capacity starter motorHeavy-duty cableJump-start receptacle

Water level indicator (Fuel)



Notes

321D LCR Hydraulic Excavator specifications26

Notes

321D LCR Hydraulic Excavator specifications 27

Notes

R

For more complete information on Cat products, dealer services, and industry solutions, visit us on the web at www.cat.com

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Printed in U.S.A.

Materials and specifications are subject to change without notice.Featured machines in photos may include additional equipment.

See your Caterpillar dealer for available options.

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AEHQ6092 (1-10)

(D-ROPS)

NACD

321D LCR Hydraulic Excavator

Documents

AEHQ6092, 321D LCR Hydraulic Excavator Specalog · Compact Radius. The 321D LCR features a compact radius design, which makes it ideal for working in space restricted areas such as: