305C CR

305C CRMini HydraulicExcavator®EngineModelMitsubishi S4Q2-TRated net power 35 kW 47 hp(ISO 9249)WeightsOperating weight 5200 kg 11,465 lbwith canopyOperating weight 5320 kg 11,725 lbwith cab• Weight with counterweight, rubber tracks, bucket,operator, full fuel and auxiliary lines.• Weight varies depending on machine configuration.

305C CR Mini Hydraulic ExcavatorEngineered by Caterpillar ® to deliver high levels of productivity, versatility and serviceability.Comfort and Ease of OperationCab or canopy, the 305C CR offers aspacious and comfortable work areawith expansive legroom. Compactradius design gives greater machineversatility and the capability to workwithin confined areas. pg. 4Performance and VersatilityHigh dig forces, fast cycle times andhigh bucket rotation angles deliver theproductivity that customers demand.A choice of stick lengths and Cat ® WorkTools makes the 305C CR even moreversatile. pg. 5Low Operating CostsRobust, reliable and easily serviced arekey attributes of the C Series CR design.Service points are easily accessedthrough rear door and side cover anda 500-hour engine oil change periodlowers operating costs. pg. 6Versatile PerformanceThe Cat 305C CR delivershigh levels of performance andoperator comfort with the versatility andlow maintenance costs of Compact Radius.2

Angle Blade ConfigurationThe versatility and productivity of theCat C Series machine can be increasedeven further by ordering the hydraulicangling dozer blade configuration. pg. 7Customer SupportCaterpillar dealers offer unmatchedcustomer support with excellentequipment management services andfast parts availability, resulting inmaximum uptime and minimumrepair costs. pg. 83

Comfort and Ease of OperationClass leading space and top level features lead to a comfortable and productiveenvironment.Impressive Cab Dimensions.The CR C Series gives the operatora comfortable and spacious workingenvironment with excellent visibility.The clear flat floor space and superioroperator legroom provide high levelsof operator comfort and helpminimize fatigue.Optional Air Conditioning. Optional airconditioning or fan and sun blindpackage offers further operator comfort.Sliding Cab Door. The sliding doorsystem offers good access andmaintains the machine's compactdimensions to reduce the risk of damage.Fully Pilot Operated Controls.Pilot operated controls on all servicesincluding travel levers and dozerfunction ensure that “as new” levelsof controllability are maintainedthroughout the machine life.Automatic Two Speed Function.Improves machine maneuverabilityaround the job site. Increasedproductivity by balancing high speedtravel requirements with controllability.Joystick Mounted Auxiliary and BoomSwing Functions. The new joystickmounted position of these functionsgives “fingertip” control and a clearcab floor.Compact Radius Design. Compactradius design gives greater machineversatility and capability to workwithin confined areas. The radius of theupper body stays within the width ofthe undercarriage so the operator canconcentrate on the work being donewithout having to worry about the backof the machine.High Level of Standard ComfortFeatures. Reclining suspension seat,power point, adjustable wrist rests anda cup holder are standard features onthe Cat C CR machines.4

Performance and VersatilityThe range of Cat buckets and hydraulically powered tools are machine matched to optimizeperformance.Turbocharged Engine. Turbochargedengine gives high power and maintainsstrong performance at high altitude.Fast, Powerful Digging. High diggingforces and fast cycle times throughsmooth responsive hydraulics, ensurethat the Cat C Series CR machinesdeliver the productivity that customersdemand.Load Sensing Hydraulics. Load sensinghydraulics optimize flow for smoothpowerful performance and increasedfuel economy.Dozer Blade Float Function. The dozerfloat enables easy ground levelling forlandscaping and finishing applications,as well as more efficient site clean-up.Stick Options. A choice of standard orlong stick enables matching of machineto application.Hydraulic ‘Thumb Ready’ Sticks.All Cat CR C Series machines comestandard with stick mounted brackets,ready to fit a hydraulic thumb.Mechanical Quick Coupler. The CatQuick Coupler makes tool changes fastand easy. It maximizes performanceas it is compatible with all standardwork tools.Work tool versatility is furtherenhanced with the option of a secondadditional auxiliary supply.Bucket Angle. High rotation bucketangle combines good spoil retentionand flat back trench characteristics.Wide Range of Work Tools. These toolsare designed to get the best out of themachine and deliver excellent valuethrough high productivity and long life.Tools include:• Digging buckets• Ditch cleaning buckets• Angling ditching buckets• Hydraulic hammers• AugersAuxiliary Lines and Connectors.The auxiliary lines and connectorsincluding quick connections are fittedas standard, meaning the Cat 305C CRcomes ready to work. Hammer (one-way)and auger (two-way) auxiliary lines arealso fitted as standard.5

Low Operating CostsGood access to main check points and major components makes servicing and maintainingthe 305C CR easier.Swing Out Rear Door. Provides accessto major components and service points:• Engine oil check and fill• Vertically mounted engine oil filter• Starter motor• AlternatorS•O•S SM Oil Sampling Valve.Allow easy sampling of the hydraulicfluid for preventative maintenance.Side-By-Side Radiator and Oil Cooler.Simplifies cleaning and reducesmaintenance times with greateraccessibility.Lifting Side Hood. Allows excellentaccess to:• Air filter• Main implement valve• Auxiliary change over valve• Accumulator• Fuel filter• Hydraulic tank500 Hour Oil and Filter Change Period.Reduces operating costs and machinedown time.Front Linkage. Protected front linkagelines are routed above the boom andstick to help reduce damage anddowntime.End Dampening. End dampening onboth boom and stick cylinders reducesshock loading, increasing componentlife and improving soil retention whenloading at height.Liner Bearings. Liner bearings in theswing casting deliver longer componentlife and reduced parts replacement costs.6

Angle Blade ConfigurationIncreased versatility and productivity are offered with the Cat angle blade.Versatility and Productivity. The CatC Series machine can be made evenmore productive by ordering the angledozer blade configuration.Strong and Durable. The Cat hydraulicangle blade is engineered to be strongand durable with a hardened steel wearedge and good protection to cylindersand hydraulic lines.25º25 0 0 25ºAngle Blade Positioning. The angleblade can be positioned straight aheador angled up to 25 degrees to the leftor right reducing the number of timesrequired to back-up and reposition whenbackfilling thus reducing operation time.Single Control Lever. All dozerfunctions are controlled from inside thecab, with fully proportional fingertipcontrol to position the blade at anyangle, from the start to 25 degrees left orright while travelling in either direction.Full Pilot Control. Full pilot controlmeans no cables or linkages to wear,keeping "as new'' controllabilitythroughout the machines life andreducing maintenance costs.Load Sensing Hydraulics, High TractionForce and Auto 2-Speed Travel.These features are standard on theCat C Series CR machines and ideallysuited for getting the best out of theangling blade installation.Excellent Blade Visibility. The compactradius design of the Cat C Seriesmachines gives excellent visibilityto the blade in any position, allowingthe blade to be positioned behind theoperator and away from the frontlinkage for better access when backdragging and finishing in tight areas.7

Customer SupportIndustry-leading customer support is provided by the Cat dealer network.Selection. Make detailed comparisonsof the machines under considerationbefore you purchase. Your Cat dealercan give you precise answers to yourquestions, as well as estimate componentlife, preventive maintenance cost andthe true cost of lost production.Purchase. Look past initial price.Consider the flexible financing optionsavailable, as well as day-to-dayoperating costs. Look at dealer servicesthat can be included in the cost of themachine to yield lower equipmentowning and operating costs over thelong haul. Your Cat dealer can providea package to meet your needs.Operation. Improving operatingtechniques can boost your profits.Your Cat dealer has training literature,video tapes, classes and other ideas tohelp increase your productivity.Equipment Maintenance Services.More and more equipment buyers areplanning for effective maintenancebefore buying. Choose from yourdealer’s wide range of maintenanceservices at the time you purchase yournew machine. Repair option programsguarantee the cost of repairs up front.Services that help optimize machineperformance include:• Customer Support Agreements• S•O•S SM and Coolant Sampling andTechnical Analysis• Maintenance contracts• Scheduled technical inspectionsUnmatched Product Support. You willfind nearly all parts at our dealer partscounter. Cat dealers use a world-widecomputer network to find in-stock partsto minimize machine downtime.Save money with genuine CatRemanufactured parts. You receivethe same warranty and reliability asnew products at a cost savings of40-70 percent.8

EngineModelMitsubishi S4Q2-TRated net power (ISO 9249) 35 kW 47 hpGross power 36.2 kW 48.5 hp• Net power rating per ISO 9249 and EEC 80/1269• Meets U.S. EPA Tier 2 emission regulationsWeightsOperating weight with canopy 5200 kg 11,465 lbOperating weight with cab 5320 kg 11,725 lb• Weight with counterweight, rubber tracks, bucket, operator,full fuel and auxiliary lines.• Weight varies depending on machine configuration.Engine DimensionsBore 88 mm 3.45 inStroke 103 mm 4.05 inDisplacement 2.505 L 153 in 3Travel SystemTravel speed – high 4.6 km/h 2.8 mphTravel speed – low 2.6 km/h 1.6 mphMax traction force – high speed 27.1 kN 6,092 lbMax traction force – low speed 48.1 kN 10,813 lbGradeability (max) – high 30º• Each track is driven by one independent 2-speed motor• Drive modules are integrated into the roller frame for totalprotection• Straight line travel when tracking and operating the frontlinkage simultaneouslyService Refill CapacitiesCooling system 11 L 2.9 galEngine oil 7 L 1.85 galFuel tank 72 L 19 galHydraulic tank 48 L 12.7 galHydraulic system 78 L 20.6 galHydraulic SystemLoad sensing hydraulics with variable displacement pumpPump flow at 2400 RPM 130 L/min 34.3 gal/minOperating pressures – equipment 245 bar 3,553 psiOperating pressure – travel 245 bar 3,553 psiOperating pressure – swing 184 bar 2,668 psiAuxiliary circuit – Primary 70 L/min 18.5 gal/min(186 bar/2,734 psi)Auxiliary circuits – Secondary 35 L/min 9.25 gal/min(174 bar/2,524 psi)Digging forces – stick (standard) 28.9 kN 6,500 lbDigging force – stick (long) 24.8 kN 5,575 lbDigging force – bucket 50.9 kN 11,445 lbSwing SystemMachine swing speed9 RPMBoom swing – left (without stop) 80ºBoom swing – left (with stop) 60ºSwing – right 50º• Automatic swing brake, spring applied, hydraulic release• Centralized lubricationSound LevelsCanopy77 dB(A)Cab78 dB(A)• Operator sound pressure levels measured per ISO 6396(dynamic).Electrical System• 50-amp alternator• 12-volt, 650 CCA, 52 amp/h maintenance-free battery• Sealed electrical connectorsBladeWidth 1980 mm 77.95 inHeight 375 mm 14.75 inDig depth 540 mm 21.25 inLift height 420 mm 16.55 in• Blade flotation function provides easier operation• Replaceable, hardened, wear resistant cutting edge305C CR Mini Hydraulic Excavator specifications9

Dimensions and Lift CapacitiesStandard StickLong Stick1 3490 mm 11'5" 3890 mm 12'9"2 2530 mm 8'3" 2940 mm 9'7"3 5650 mm 18'7" 6050 mm 19'10"4 5810 mm 19'1" 6200 mm 20'4"5 5370 mm 17'7" 5630 mm 18'6"6 3800 mm 12'6" 4050 mm 13'3"7 2400 mm 7'10" 2530 mm 8'3"8 1070 mm 3'6" 1070 mm 3'6"9 420 mm 1'5" 420 mm 1'5"10 540 mm 1'9" 540 mm 1'9"Standard StickLong Stick11 1730 mm 5'8" 2090 mm 6'9"12 2550 mm 8'4" 2550 mm 8'4"13 615 mm 2'0" 615 mm 2'0"14 2580 mm 8'6" 2580 mm 8'6"15 5330 mm 17'6" 5460 mm 17'10"16 785 mm 2'7" 785 mm 2'7"17 695 mm 2'3" 695 mm 2'3"18 400 mm 1'4" 400 mm 1'4"19 1980 mm 6'6" 1980 mm 6'6"With tracks level on the ground.Track and blade width 1980 mm 6'6"Gauge width 1580 mm 5'2"Shoe width 400 mm 1'4"Lift Capacities at Ground Level Over Front Over Side Over Front Over SideLift point radius 3000 mm 9'11" 3000 mm 9'11" 5330 mm 17'6" 5330 mm 17'6"Blade down 2580 kg* 5,689 lb* 1100 kg 2,426 lb 890 kg* 1,962 lb* 460 kg 1,014 lbBlade up 1330 kg 2,933 lb 980 kg 2,161 lb 550 kg 1,213 lb 410 kg 904 lb*Limited by hydraulic capacity rather than tipping load.The above loads are in compliance with SAE hydraulic excavator lift capacity rating standard SAE J1097 and they do not exceed 87% of hydraulic lifting capacityor 75% of tipping capacity.The excavator bucket weight is not included on this chart. Lifting capacities for standard stick.10 305C CR Mini Hydraulic Excavator specifications

Standard EquipmentStandard equipment may vary. Consult your Caterpillar dealer for details.Additional Counterweight 165 kg (364 lb)Adjustable wrist restsAlternatorAutomatic swing park brakeAuxiliary hydraulic circuit valve controls,and 1 way hammer lines to the stick2 way (auger) auxiliary hydraulic lines to the stickAuxiliary line quick couplersBoom cylinder guardCab mounted work lightCanopy with FOPS ISO10262 (Level 1),and Tip-Over protection ISO12117Coat hook and cup holderControl pattern changerDial type acceleratorDozer blade with float functionFloor matFoot travel pedalsGauges or indicators for fuel level enginecoolant temperature, hour meter, engine oil pressure,air cleaner, alternator and glow plugs, service intervalHornHydraulic oil coolerLockable storage boxLow maintenance linkage pin jointsMaintenance-free batteryRubber trackRetractable seat beltStandard stickSuspension seat, vinyl covered‘Thumb ready’ sticksTravel alarmTwo speed travelOptional EquipmentOptional equipment may vary. Consult your Caterpillar dealer for details.Air conditioningAdditional auxiliary linesBiodegradable hydraulic oilBoom check valveBoom mounted lightCab, fully glazed with FOPS ISO10262 (Level 1),and Tip-Over Protection ISO 12117 with:heater/defroster, interior light and windshield wiper/washerEcology drain valve for hydraulic tankEcology drain valve for engine oilFan and sun blind installationFront screen guard for cab and canopyImmobilizer systemLong stickMechanical quick couplerMirrors for cab and canopyRadio installation kitFactory fitted radio/CD playerSeat belt, 75 mm (3 in) wideSuspension seat, fabric coveredHigh back suspension seat, fabric coveredTool kitWork tools305C CR Mini Hydraulic Excavator specifications11

305C CR Mini Hydraulic ExcavatorFor more complete information on Cat products, dealer services,and industry solutions, visit us on the web at www.cat.com© 2006 CaterpillarAll Rights ReservedPrinted in U.S.A.AEHQ5683-02 (12-06)Replaces: AEHQ5683-01Materials and specifications are subject to change without notice.Featured machines in photos may include additional equipment.See your Caterpillar dealer for available options.CAT, CATERPILLAR, their respective logos and “Caterpillar Yellow” and thePOWER EDGE trade dress, as well as corporate and product identity used herein,are trademarks of Caterpillar and may not be used without permission.R