®®

EngineEngine Model Cat® C9Net Flywheel Power 178 kW 239 hp

• Cat C9 engine with ACERT® Technology to meet EPA Tier 3 and EU Stage IIIA emissions.

BucketsCapacity – General Purpose 3.2 m3 4.19 yd3

Capacity – Multi-Purpose 2.9 m3 3.79 yd3

• Bucket capacities are with long bolt-on teeth and segments.

WeightsOperating Weight 26 373 kg 58,142 lb

• Operating Weight: Includes coolant, lubricants, 100% fueltank, ROPS/FOPS cab, General Purpose Bucket with longbolt-on teeth and segments and 75 kg (165 lb) operator.

973CTrack Loader

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973C Track LoaderLeading edge design, state-of-the-art technology and unmatched versatility in one machine allows maximum productivity.

Top Performance.A machine designed to be productive over a wide range of tough applications — fromheavy clearing to high-volume truck loading,from the slag pits of steel mills to big citylandfills. The 973C not only can master thetoughest excavation but can also finish gradewith delicate precision.Reliable, durable, rugged construction, self-diagnosis of electrical and power train systems,and easy maintenance help ensure extendedservice life.

Special Application Arrangements

Special arrangements – Waste Handling/Demolition, Steel Mill, Wide Gauge andmore, are available or can be designedon request to allow the 973C to work in the toughest conditions. pg. 14

Undercarriage

Improved traction, increased machinestability and reduced frame impact are benefits of the Cat oscillatingundercarriage. The Cat sealed andlubricated track reduces pin and internalbushing wear, reduces componentfriction and track noise, extending track life. pg. 12

Caterpillar Monitoring System (CMS)

The Caterpillar Monitoring System with flashable memory, monitors thehydrostatic and electrical systems andprovides the operator instant feedbackon the machine conditions. pg. 7

Hydrostatic Drive

The hydrostatic drive with electroniccontrol provides precise modulation forquick, smooth operation and superiormaneuverability. Shorter cycle times,high efficiency, and excellentmaneuverability result in increasedproductivity. pg. 6

Engine

The new Cat® C9 ATAAC diesel engineretains the reliability, durability andperformance of it’s predecessor, whileadding the benefits of Caterpillar®

ACERT™ Technology for compliancewith the stringent Tier 3/Stage IIIAemission standards. pg. 4

✔

✔ New Feature

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Total Customer Support

Your Caterpillar dealer offers a widerange of services which can be set upwith a Customer Support Agreement. A customized plan, from PM service to total machine maintenance, withflexible financing, allows for optimalreturn on investment. pg. 16

Serviceability

The 973C design offers reducedmaintenance, convenient access tocomponents, easy diagnostic capabilities,as well as easy and economical componentreplacement possibilities. Cat dealers alsoprovide quick parts availability. pg. 15

Work Tools

A large choice of buckets, GroundEngaging Tools (GET), and attachments,allow configuration of the 973C formaximum performance in virtually any job. pg. 11

Structure

The box-section mainframe is designedspecifically for the work of the trackloader. It provides durability, resistanceto twisting and a solid base for allcomponents. The dual Z-bar linkageoffers increased breakout force and fastdump speed for enhanced productivity.pg. 10

Operator Station

The C-Series Track Loader is designedfor operator comfort, convenience, andproductivity. Sound suppressed ROPScab, heating and air conditioning, anadjustable air-suspension seat with side-to-side isolator, and pilot hydraulicimplement controls help reduceoperator fatigue. pg. 8

C9 Diesel Engine. The Cat C9 is an 8.8 liter (537 in3) displacement, six-cylinder, in-line configured engine withhydraulically actuated electronic fuelinjection. It uses ACERT™ Technology,a series of Caterpillar engineeredinnovations that provide advancedelectronic control, precision fuel deliveryand refined air management, resultingin outstanding performance and loweremissions.

The Cat C9 with ACERT Technologymeets the U.S. EPA Tier 3 and EuropeanUnion Stage IIIA emissions standards,which dramatically restrict the emissionof nitrogen oxide and other pollutants inan effort to improve worldwide air quality.The C9 rating is 178 net kW (239 net hp)at 1,800 rpm.

Design. The C9 with ACERT Technologyis based on the proven Cat C-9 Tier 2/Stage II engine with thousands currentlyin operation. It offers a compact designwith big, heavy-duty engine features foroutstanding durability, reliability andperformance. The cylinder head featuresa new cross-flow air design with fourvalves per cylinder and updated portgeometry. The improved intake portgeometry provides smoother transitionsand less flow restrictions. The C9 usesmid-support wet cylinder liners, which areeasily removed for service. A two-stephoning process is used for cutting deepgrooves for oil retention.

ADEM™ A4. The ADEM A4 electroniccontroller is the brain of the engine andcontains the engine’s control software.All the sensors are remote-mounted andconnected to the main module.

The main concept behind ACERT is “advanced combustion”. ACERTtechnology begins with ADEM A4.This electronic brain regulates fueldelivery, airflow and other enginefunctions. The controller directs theHEUI injectors to deliver multipleinjections of fuel during the engine’scompression stroke.

The C9 features ADEM A4, the mostadvanced 32-bit Electronic EngineControl available. ADEM A4 offersgreater processing speeds and memorythan ADEM III. It offers a variety offuel maps to optimize ACERT technologyfor better performance and efficiency.

Fuel System. Hydraulically actuatedelectronic fuel injection is a Cat exclusivetechnology and has a proven track record.The HEUI design has been refined andnow supplies multiple injections of fuelduring the engine’s compression stroke.With multiple injection, fuel is introducedto the combustion chamber in a numberof controlled microbursts, rather than allat once, so it precisely regulates thecombustion cycle. The improved HEUIdesign also offers improved combustionand fuel delivery. An added benefit ofthis is better control of engine soundand vibration levels.The HEUI systemcontinues to offer excellent reliabilitybecause it has fewer moving parts thanmechanical unit injection and requiresvery few adjustments, reducingmaintenance costs and increasingmachine availability.

Design. The fuel system design eliminatesexternal high-pressure fuel lines, providingefficient, precise fuel delivery, and timing.

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Provides power, reliability and acts as a working counterweight in the rear of the machine,for optimum balance.

Engine

Serviceability. Unit injectors can beserviced individually, without the needto service the whole fuel system.

Turbocharger and Aftercooler.The turbocharger is a wastegate designwith a new titanium compressor wheel.The titanium wheel is better able towithstand the stress and wear of high-speed operation. This new turbocharger iswell-matched to the air-to-air aftercoolerresulting in high power. The exhaustdriven turbocharger packs more air intothe cylinders, while the air-to-airaftercooler cools the pressurized air fromthe turbocharger, making the engineintake air denser. The increased air inthe cylinders results in more power,improved combustion, and reducedexhaust emissions.

Cooling System. Incorporated into asingle-plane cooling unit are the engineradiator, the hydraulic and power trainoil coolers, and the air-to-air aftercooler.Wide fin spacing for “Trash Resistance”and swing-out latched grille for easycleaning are now standard equipment.

Extended Life Design. The forged steelcrankshaft increases strength anddurability. It features induction hardenedjournals and fillets. The camshaft is madeof carburized and heat-treated steel forexcellent durability. The pistons feature anarticulated two-piece design. The forgedsteel crown is stronger than aluminum andallows more flexibility in the ring position.

Starting System. The ADEM™ A4controller controls the electric starter motor and the starter relay. The ADEM A4 prevents fuel from beingsupplied for starting until sufficient oilpressure is present. This prevents wearon the bearings due to operating withoutadequate lubrication.

Engine Installation. The engine isinstalled using rubber mounts to reducethe transfer of engine vibration to theframe and cab, lowering operatorvibration, sound levels, and fatigue.

Rear Engine Location. Rear enginelocation allows excellent forwardvisibility, while serving as a workingcounterweight. Helps reduce radiatorplugging while providing easy serviceaccess to the engine and other majorcomponents.

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Shifting. The hydrostatic drive eliminatesthe need for transmission shifting, whichallows the operator to concentrate onworking, maneuvering, and production.

Machine Speed. The ElectronicHydrostatic Control (EHC) automaticallyadjusts machine speed to give theequipment hydraulic system priority,while the hydrostatic system takesadvantage of all remaining engine power.

Electronic Hydrostatic Control (EHC).The EHC maintains engine rpm inoptimum operating range and balancesthe two track drive systems for straighttravel without machine drift.

Caterpillar Monitoring System (CMS).The EHC interfaces with the CMS forsystem diagnostics and calibrations. It isself diagnosing, and fully compatible withElectronic Technician (Cat ET) software.This allows quick and easy calibrationsand troubleshooting.

Pumps and Drive Motors.Variable displacement pumps andvariable displacement drive motors areelectronically controlled by the EHC,offering high efficiency and precise travel.Each track is independently driven by aseparate hydraulic circuit consisting of onevariable displacement pump, connectedby Cat XT™-6 hydraulic hose andcouplings to a variable displacementpiston motor.

Separate Hydraulic Pumps. Separatehydraulic pumps offer easy servicing.

Maneuverability. Independent power isprovided to each track, which providesgreat maneuverability, speed, and sideslope operation. Controlling independentpower and speed for each track allowsthe operator to maintain full power toboth tracks while turning, achieving a “Power Turn”. Power Turns allowincreased productivity when dozing or backfilling. For additionalmaneuverability, the operator can use counter rotation, which allows spot turns in tight locations.

Travel Speeds. Travel speeds areinfinitely variable between zero and topspeed. Two speed modes, “travel mode”and “work mode”, provide two differentspeed ranges to best match machinespeed and torque to the job conditions formaximum productivity. Maximum travelspeed is increased to 10 kph (6.2 mph)when the travel/work mode switch is in the travel position. In addition, switchbetween travel and work positions takeseffect immediately.

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Hydrostatic DriveThe electronically controlled hydrostatic drive helps provide quick response for shorter cycletimes and increased productivity.

Caterpillar Monitoring System Functions.The CMS offers three main functions.1) Quick and simple calibration of thehydrostatic drive system. 2) Preventionof damage by alerting the operator if amachine fault has occurred. 3) Monitoringof hydrostatic and electrical systems toaid service personnel in troubleshootingand repairs.

Gauge Cluster. The gauge cluster containsfour gauges, which monitor:

• Engine coolant temperature

• Power train oil temperature

• Hydraulic tank oil temperature

• Fuel level

Alert Indicators. The alert indicator clustergroups the individual alert indicators for:

• Low fuel pressure

• Low fuel

• Charge filter bypass

• High pump drive

• Low hydrostatic system chargepressure

• Low engine oil pressure

• Check engine detected by ADEM A4

• Low/high alternator output

• System warning for hydrostaticdrive system

• Ether aid activated

Digital Message Display. The digitaldisplay can show the operator’s choiceof hour meter, engine rpm, odometer, or service codes.

Service Mode. When in service mode,service codes from the EHC are shown onthe Digital Message Display. The servicecode information is transferred via theCat Data Link from the EHC to themain display module.

Three Level Warning System.CMS also functions as a warningsystem with three levels of warning.

CMS – Self Test. The CMS self-testverifies that the main display module is operating properly every time the keystart switch is turned from the “off” tothe”on” position.

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Caterpillar Monitoring System (CMS)The Caterpillar Monitoring System offers three main functions.

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Designed for operator comfort, convenience and ease of operation throughout the work day.

Operator Station

1. Heating and Air Conditioning.The air circulation system deliversfiltered, pressurized, and temperature-controlled air through 10 louvered vents.Air conditioning and heater are standardequipment.

2. Cat Comfort Series Seat. The Caterpillarair-suspension seat, with side-to-sideisolator, is ergonomically designed andfully adjustable for maximum operatorcomfort and control. The backrestconforms to the operator’s spinal curve.The contoured base curves away fromlower back to reduce pressure.Retractable seat belt is 76 mm (3 in)wide for positive, comfortable restraint.

3. Storage Space. Storage spaces includea lockable storage box, a lunch boxcompartment, beverage holder, and coat hook.

4. Armrests. Adjustable armrests can bepositioned up or down. The right armrestis adjustable forward and backward.Each armrest can be inclined to differentangles for excellent operator comfortand control.

5. Dashboard. The newly designedsmooth, rounded dashboard with integraldefroster vents, provides all the necessaryfunctions and instrumentation withinthe operator’s normal line of sight.

6. Hydrostatic Drive System Controls.The hydrostatic drive system controlsallow quick speed and directionalchanges from a single control lever formaximum maneuverability. Pedal steeringallows precise control of each trackindependently, with on demand counterrotation. The brake pedal supplementsdynamic hydraulic braking providedby the hydrostatic drive system.

7. Speed Switches. The speed modeswitch allows the operator to choosebetween “work mode” and “travel mode”or maximum drive speed, to best matchthe machine speed to various jobconditions. The electronic engine speedselector switch is used by the operatorto set engine rpm.

8. Pilot Operated Controls. Pilot operatedimplement controls allow easier operationand greater productivity. Choice ofsingle-lever pilot control (standard) ortwo-lever (optional) is available for bucketlift and dump. Adjustable automatic liftand bucket position kickout allow theoperator to concentrate on positioning themachine, resulting in higher productivity.

9. Viewing Area. The viewing areaincludes tinted glass to reduce glare andprovides excellent visibility to the bucket,tracks, and around the engine enclosureto the rear. Sunvisor, windshield wipersand washers are all standard features onthe cab. The front wiper has variablespeed, intermittent control.

10. Rearview Mirror. The rear view mirroris located above the front windshield,maximizing the operator’s visibility.

Adjustable Steering Pedals. The totaltravel of the steering pedals is 23° butthe angle can be adjusted from 35° to 50°.

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Mainframe and Loader Tower.The mainframe and loader tower is asingle, welded fabrication with castingsand forgings incorporated at points ofhigh stress to distribute those stressesover wide areas for a long structural life.

Design. Strong box-section mainframedesign, with continuous, deep-penetrationwelds resist twisting loads to protectcomponents from excessive wear ordamage without adding extra weight tothe machine. The frame rails consist oftwo box sections, which are joined at therear by a box-section cross member.Mounting points for the final drives,pivot shafts, and operator’s platform areintegrated into each mainframe side rail.

Four-Plate Loader Tower. The four-plateloader tower is integral with the basicmainframe. The loader tower distributesforces evenly from the lift arms to themainframe, which eliminates twistingfor maximum structural durability. The loader tower provides solidmounting points for lift arms, liftcylinders, and Z-Bar tilt cylinders.

Castings. Steel castings (shown in red) areused in areas of high stress concentration.Large radius curves dissipate stresses thatcould cause fatigue and cracking.

Steel Frame. Fatigue resistant steel framesections along with castings provideflexibility, durability and excellentresistance to impact loads.

Durability. Structures are designed toprovide durability and extended servicelife to support multiple rebuilds.

Straddle Mounting. Straddle mountingsupports all lift arm pivot points on bothends of the pin eliminating twisting forcesand enhancing structural durability.

Z-Bar Linkage. Breakout force isexceptionally high due to the mechanicaladvantage of Z-bar linkage design, andhydraulic pressure applied to the headend of the tilt cylinders. Using dual tiltcylinders and linkage provides theoperator a better view of the work area, bucket, and cutting edge.

Sealed Loader Linkage. The 973C linkagehas fewer grease points compared to otherlinkage designs because many pin jointsare sealed to keep dirt out. Fewer greasepoints and sealed pins means lessdowntime for maintenance allowingmore working hours between servicing.

Simultaneous Lift and Dump.Simultaneous lift and dump for fast truckloading and smooth grading, and theability to meter material from bucket.

Lift Kickout. Adjustable automatic liftkickout and bucket positioner allow theoperator to concentrate on positioningthe machine rather than the bucket. This results in greater productivity.

Lift Arms. The two arms are welded intoa single unit, using a weld-fabricatedcross-tube. The fabricated cross-tubeand tilt lever, use forgings at high stresspoints to spread the loads for long life.

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StructureThe box-section mainframe is designed to handle heavy loads, while the dual Z-Bar linkagemaximizes breakout force, while distributing stress loads to the mainframe.

Versatility. The large variety of tasks anoperator can perform with the standardmachine and attachments has lead to theCaterpillar track loader’s reputation forversatility.

General Purpose Bucket. The GeneralPurpose (GP) bucket is designed forexcellent loadability and long life in applications such as hard bankexcavating, stripping, and stockpileloading. High-strength, low alloy steel helps the bucket resist dents andabrasions. Shell-tine reinforcementssupport the rear of the bucket forincreased structural strength.

Multi-Purpose Bucket. The Multipurpose(MP) bucket is designed for a broad rangeof applications, such as loading, stripping,clearing, bulldozing, picking up debris,and fine grading. The bucket clampshydraulically to grip logs or handleother tough-to-grasp materials.

Extreme-Service Multi-Purpose Bucket.Offered as an attachment, the extreme-service Multi-purpose bucket has thesame load capacity as the Multi-Purposebucket. The reinforced hinges, thickerside-plates, and reinforced spill-plateare designed into the extreme-serviceMulti-Purpose bucket for situationswhere the stresses can exceed the designobjectives of the standard MP bucket.

Slag Bucket. The Slag bucket is speciallydesigned to meet the unique challengespresented by slag handling applications.Designed for continuous heavy-duty workin hot slag, the thicker material absorbsslag heat which virtually eliminatesbucket distortion.

Landfill Multi-Purpose Bucket.The Landfill Multi-Purpose (MP Landfill)bucket combines the versatility of a Multi-Purpose bucket with theperformance of a Landfill design.Constructed with a trash-rack forincreased capacity, extra strength andbetter load retention. Ideal for applicationsin the harsh refuse market, whetherdigging or spreading material at thelandfill or grasping and loading refuse ata transfer station. The clamping actionof the front section gives the bucket theability to load material, doze with thestraight side of the dozer, grab bulkyitems with the clamp or control thedischarge of fill/cover material.

Ripper-Scarifier. The ripper-scarifieradds extra versatility to expand theapplication of the machine. Hinged-type,with three shanks, beam mounted withtwo pins pressed into each side of themainframe. Raised and lowered with twowide-mounted cylinders. Six-pin linkagerequires no lubrication.

Bucket Protection Options. Caterpillaroffers several types of adapters, tips, andcutting edges, which increase bucket lifeand maximize performance. (1) Bolt-onadapters, tips, and bolt-on reversible edgesegments provide a clean working floorand increase bucket capacity. Heavy-dutysegments are available with 62 percentmore wear material than standardsegments. (2) Bolt-on, 2-strap adapters,and tips, including corner adapters, offerexcellent penetration. (3) Bolt-on,reversible, cutting edges are ideal whenpenetration is not a consideration, such asin clean work or stockpiling applications.(4) Weld-on, top-strap adapters are alsoavailable with a GP bucket. They areflush-mounted with the bottom of thecutting edge to provide a smooth bucketbottom and unrutted work surface.These adapters can be used with any of the tip options (not with a bolt-onprotection system).

Tip Options. Caterpillar GET offers avariety of tips to better accommodateyour needs in any working environment,whether that is high impact or general-purpose applications.

K Series™ Tooth System. The new K Series tooth system matches customerrequirements of longer life, improvedperformance, greater reliability and easeof removal and installation.

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Work ToolsA variety of attachments and Ground Engaging Tools (GET) are available to maximizeperformance in any application.

Undercarriage. The oscillating track rollerframe design decreases ground inducedimpact loads to the machine, increasesmachine stability on rough terrain, andprovides a smoother, more comfortableride for the operator.

Pivot Shaft. Steel pivot shafts attach therear ends of the track roller frames to theloader mainframe and carry most of theweight. The pivot shafts transfer groundinduced shock loads from the track rollerframes to the loader mainframe ratherthan through the final drives. The resultis longer final drive life.

Equalizer Bar. The equalizer bar is pinnedin its center to the machine mainframeand at the ends to each track roller frame.This allows the forward ends of the trackroller frames to oscillate, or movevertically, to keep more track on theground in uneven underfoot conditions.The equalizer bar also provides a morestable work platform for the operator,who will be comfortable working atfaster speeds for increased productivity.

Track Roller Frame. The track rollerframes are a welded, box section design,similar to the box section design of themainframe and loader tower, whichprovides strength and resistance tobending without adding extra weight.

Track and Carrier Rollers. Seven trackrollers spread the machine weight overa larger area. This improves stability andprovides a more comfortable ride for theoperator. Two upper carrier rollers on eachside mount to the machine mainframe.This mounting arrangement helps resistmud packing of the undercarriage.

Track Adjuster. The track adjuster andmechanical recoil system uses a largerecoil spring and grease filled adjustmentcylinder, which allows the idler to moveforward and back to maintain proper tracktension as it absorbs undercarriageshock loads.

Swing-Link Idler. Permits horizontal idlermovement, absorbing shock loads andmaintaining proper track tension, whileeliminating the need for shims and wearstrips. The removal of wear stripseliminates a point of service andmaintenance. Cat idlers providesuperior structural support.

Sealed and Lubricated Track. Sealed andlubricated track keeps maintenance costsdown by reducing pin and internal bushingwear, which can extend the life of thetrack and the undercarriage components.Lubricating the pin helps reducecomponent friction for less track noiseand greater power train efficiency.

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Keeps more track on the ground for maximum traction and stability. Several shoe optionsprovide best match to job conditions.

Undercarriage

Track Links. The standard track links arethe newest generation of Extended WearLife (EWL) track. Included is more wearmaterial for longer track life. A two-piece,split master link allows easy trackremoval and installation.

Sprockets. The Tough Steel™ sprocketsegments extend sprocket segment life.The five segments are bolted onto eachfinal drive sprocket hub. Segments canbe removed or replaced without breakingthe track. Driven by every second sprockettooth, the track chain makes two completerevolutions before each tooth contacts abushing once. The result is long, evenwear of the sprocket teeth.

Shoe Options. There are several shoeoptions to choose from with the Caterpillaroscillating undercarriage. Wide, doublegrouser is now standard. Consult yourCaterpillar dealer for more information.

1. Double Grouser Shoes. The standarddouble grouser shoes are designed forgood traction, easy turns, and reducedbending.

2. Trapezoidal Center Hole Shoes.Trapezoidal center hole shoes let thesprocket push out dirt and debris, toreduce packing between the shoe andthe bushing.

3. Single Grouser Shoes. Single grousershoes increase penetration and tractionin lower impact and lower abrasionconditions.

4. Chopper Shoes. Chopper shoes aresingle grouser shoes with trapezoidalcenter hole and additional diagonal sidegrousers for increased chopping ability.Recommended for landfills, transferstations and demolition applications.

Extreme Service Shoes. Extreme serviceshoes are available with more hardenedwear material for longer wear life andhigher impact applications.

Wider Shoes. Wider shoes are alsoavailable to reduce ground pressure in soft underfoot conditions.

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Waste Handling/DemolitionArrangements. Waste Handling/Demolition arrangements provide addedversatility and are designed to make the973C perform well in sanitary landfills,waste handling or demolition applicationswhere the machine spreads, compacts,sorts, shreds and crushes materials.

Steel Mill Arrangement. Steel millarrangements allow the 973C to play a key role in the mill’s production.The compact stature and maneuverabilityof the 973C is well suited for workingand traveling in a mill. Special guardingfor the operator, machine, and hydraulicsare added. Equipped with a Steel Mill/Slag bucket it has the durability andbreakout force to handle the hot slag.

Wide Gauge Arrangement. The WideGauge 973C is designed for work in verysoft underfoot conditions. For enhancedflotation and stability, the track gaugehas been widened and wider track shoesinstalled. The larger track shoes increasethe ground contact area for reducedground pressure.

Additional Arrangements. Many otherarrangements are available. For othercustom-designed arrangements forspecific applications, contact yourCaterpillar Dealer.

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Special Application ArrangementsSpecial arrangements are available, or can be designed on request, to allow the 973C towork in special applications.

Reduced Maintenance. The 973C hasmany service features incorporated inthe machine including:

• Caterpillar Extended Life Coolantfor extended change intervals.

• Sealed electrical connectors lock out dust and moisture.

• Caterpillar XT™ hydraulic hose, inmedium and high-pressure circuits,provide high abrasion resistance andfar exceed industry standards.

• O-Ring Face Seals (ORFS) hydrauliccouplings help eliminate fluid leaks,provide positive seals, and arereusable for lower operating costs.

• Removable floor panels in the cab to access the engine, and hystat andimplement pumps.

• Extended change intervals for engineand hydraulic/hystat oil.

• Scheduled Oil Sampling FluidsAnalysis helps avoid unnecessarydowntime.

Fluid taps make oil sampling easier.

Service Intervals. The time betweenfluid and filter service intervals hasbeen significantly increased, minimizingdowntime and maximizing productivityfor the 973C.

Easy Component Access. The rear enginedesign and large engine access doors makeit easy to reach the engine, electricalcomponents, hydrostatic system, andbatteries. Hydraulic and fuel filters arelocated close to each other. Removablecab floor panels create easy access tointernal components. The hydrostaticdrive system features separate pumps andmotors for low replacement or rebuildcost. All lubrication points are accessiblefrom ground level. The swing-out latchedgrille, now standard, reduces downtimeand the cost for cleaning, inspection,and repair of the cooling package.

Charge and Case Drain Filters.Two spin-on, hydraulic oil filters for the hydrostatic drive system, are locatedinside the right access door for ease of access.

Water Seperator and Fuel Filter.The water separator and fuel filter arelocated inside the rear right access doorfor ease of access and serviceability.

Product Link. This option allows thecustomer or dealer to obtain machinediagnostics and location from theiroffices. Product Link provides updateson service meter hours, machinecondition, machine location, andintegrated mapping/route planning.

Easy Diagnosis. The CaterpillarMonitoring System and self-diagnosingElectronic Hydraulic Control (EHC) worktogether to warn against both occurringand impending faults to reduce downtime.The electrical wiring is color-coded andnumbered for easy diagnosis and repair.

Serviceability. Centralized drainingpoint for splitter box, engine and powertrain allow to even more improvedserviceability of the 973C.

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ServiceabilitySimplified service and extended service intervals means more productive uptime.

Product Support. Your Cat Dealer offersa wide range of services which can be setup with a Customer Support Agreement.The dealer can customize a plan for you,from PM service to total machinemaintenance, allowing you to optimizeyour return on investment.

Remanufactured Components.Save money with remanufactured parts.They offer the same warranty andreliability as new products at a costsavings of 40 to 70 percent.

Replacement. Repair, rebuild, or replace?Your Cat Dealer can help evaluate thecost involved so you can make the right choice.

Service Capability. Whether in thedealer’s fully equipped shop or in the field,you will get trained service techniciansusing the latest technology and tools.

Selection. Make detailed comparisons ofthe machines you are considering beforeyou buy. How long do components last? What is the cost of preventivemaintenance? What is the true cost oflost production? Your Cat Dealer cangive you answers to these questions.

Purchase. Consider the financing optionsavailable as well as day-to-day operatingcosts. This is also the time to look atdealer services which can be includedin the cost of the machine to yield lowerequipment owning and operating costsover the long run.

Maintenance. More and more equipmentbuyers are planning for effectivemaintenance before buying equipment.Choose from your dealer’s wide rangeof maintenance services at the time ofyour purchase. Repair option programsguarantee the cost of repairs up front.Diagnostic programs such as ScheduledOil Sampling and Technical Analysishelp avoid unscheduled repairs.

Operation. Improving operatingtechniques can boost your profits. Your Cat Dealer has training videotapes,literature, and other ideas to help youincrease productivity.

SAFETY.CAT.COM™.

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Total Customer SupportYour Caterpillar dealer offers a wide range of services which can be set up with a CustomerSupport Agreement. A customized plan, from PM service to total machine maintenance, withflexible financing, allows for optimal return on investment.

17973C Track Loader specifications

Drive System

Type Hydrostatic drive with infinitemachine speeds up to 10 km/h(6.2 mph)

Drive Pump Two, variable-displacement,slipper-type axial piston pumps

Track Motor Two, variable-displacement, bent axis piston motors

Relief Valve Setting 44 000 kPa 6,380 psi

Hydraulic System – Equipment

Type VaneOutput 335 L/min 88.5 gal/minMain Relief Valve Setting 19 000 kPa 2,755 psiLift Cylinders – Bore 165 mm 6.5 inLift Cylinders – Stroke 935 mm 36.8 inTilt Cylinders – Bore 140 mm 5.5 inTilt Cylinders – Stroke 633 mm 24.9 in

Hydraulic System – Pilot

Output – Maximum 12 L/min 3.2 gal/minRelief Valve Setting 2400 kPa 348 psiCycle Time – Raise 6.7 SecondsCycle Time – Dump 5.1 SecondsCycle Time – Lower, Empty, 2.9 SecondsFloat Down

Service Refill Capacities

Fuel Tank 430 L 113 galCooling System 43 L 11 galCrankcase (with Filter) 29 L 7.66 galFinal Drives (each) 28.5 L 7.5 galHydraulic Tank 67 L 17.7 galPump Drive Box 3.8 L 1 galPivot Shaft 3 L 0.8 galHydraulic System 169 L 44.6 galHydrostatic Drive System 83 L 21.9 gal

Engine

Engine Model Cat C9Net Flywheel Power 178 kW 239 hpNet Power – Caterpillar 178 kW 239 hpNet Power – ISO 9249 178 kW 239 hpNet Power – SAE J1349 178 kW 239 hpNet Power – EEC 80/1269 178 kW 239 hpBore 112 mm 4.41 inStroke 149 mm 5.87 inDisplacement 8.8 L 537 in3

• Cat C9 engine with ACERT® Technology to meet U.S. EPATier 3 (Jan 2006), European Union Stage IIIA 97/68/EC(Jan 2006) and Japan Ministry of Land, Infrastructure andTransport (Oct 2006) emissions.

• Engine ratings at 2,150 rpm.

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

• No derating required up to 4572 m (15,000 ft) altitude.

Undercarriage

Track Shoe Type Double Grouser,Extreme Service

Track Shoe Width – Standard 500 mm 19.7 inTrack Shoe Width – Optional 675 mm 26.6 inTrack Rollers – Each Side 7Number of Shoes – Each Side 40Track on Ground 2930 mm 115 inGround Contact Area – Standard Shoe 2.93 m2 4,542 in2

Ground Contact Area – Optional Shoe 3.96 m2 6,138 in2

Ground Pressure – Standard Shoe 88.3 kPa 12.8 psiGround Pressure – Optional Shoe 65.3 kPa 9.4 psiGrouser Height – Double Grouser 49 mm 1.93 inTrack Gauge 2080 mm 82 in

• Wide Gauge Arrangement available for lower groundpressure applications.

• Ground pressure is calculated using operating weight of machine with GP bucket, teeth and segments.

18 973C Track Loader specifications

Ripper Specifications

Type RadialNumber of Pockets 3Overall Width/Beam 2200 mm 86 inShank Cross Section 74 � 175 mm 2.9 � 6.9 inGround Clearance 670 mm 26 inPenetration 428 mm 17 inRipping Width 2000 mm 78.74 inCylinders – Bore 127 mm 5 inCylinders – Stroke 365 mm 14.4 inAddition to Machine Length due to 1875 mm 73.8 inRipper (in Transportation Position)

Standards

• ROPS (Rollover Protective Structure) offered by Caterpillarfor the machine meets ROPS criteria SAE J397 OCT95, SAE J1040 MAY94, ISO 3164:1995, ISO 3471:1994.

• FOPS (Falling Object Protective Structure) meets SAE J231 JAN81, ISO 3449:1992 Level II.

• Brakes meet the standard SAE J1026 APR90, ISO 10265:1998.

• The operator sound exposure Leq (equivalent sound pressurelevel) measured according to the work cycle proceduresspecified in ANSI/SAE J1166 MAY90 is 85 dB(A), for cab offeredby Caterpillar, when properly installed and maintained andtested with the doors and windows closed.

• Hearing protection may be needed when operating with anopen operator station and cab (when not properly maintainedor doors/windows open) for extended periods or in a noisyenvironment.

• The exterior sound power level for the standard machinemeets the sound directive 2000/14/EC.

Electrical System

Type 24V DCBattery Capacity 1100 CCABattery Voltage 12Battery Quantity 2Alternator 65-amp, Heavy-duty

Brushless

Weights

Operating Weight 26 373 kg 58,142 lbShipping Weight – Without Bucket 24 263 kg 53,490 lb

• Operating Weight: Includes coolant, lubricants, 100% fuel tank,ROPS/FOPS cab, General Purpose Bucket with long bolt-onteeth and segments and 75 kg (65 lb) operator.

• Shipping Weight: Includes coolant, lubricants, 10% fuel tank,ROPS/FOPS cab and no bucket.

Buckets

Capacity – General Purpose 3.2 m3 4.19 yd3

Capacity – Multi-Purpose 2.9 m3 3.79 yd3

Bucket Width – General Purpose 2845 mm 112 inBucket Width – Multi-Purpose 2710 mm 107 in

• Bucket capacities are with long bolt-on teeth and segments.

• Bucket widths are based on a bare bucket.

Operating Specifications

Max. Travel Speed 10 km/h 6.2 mph

19973C Track Loader specifications

1 Overall machine width without bucket:

with standard tracks – 500 mm (19.7 in shoes) 2580 mm (102 in)

with wide tracks – 675 mm (26.6 in shoes) 2755 mm (108.46 in)

2 Ground clearance from face of shoe 457 mm (17.9 in)

Grading angle 69°3 Machine height to top of cab 3500 mm (137.8 in)

4 Length to front of track 5178 mm (203.8 in)

5 Overall machine length �6 Carry position approach angle 15°7 Digging depth �8 Maximum rollback at ground �9 Maximum rollback at carry position �10 Bucket height in carry position �11 Reach at full lift height �12 S.A.E. specified dump angle 45° (46° max.)

13 Maximum rollback, fully raised 58°14 Dump clearance at full lift height and 45° discharge �15 Height to bucket hinge pin 4235 mm (166.7 in)

16 Overall machine height, bucket fully raised �17 Height to top of seat with headrest 2970 mm (117 in)

18 Height to top of stack 2989 mm (118 in)

� Dimensions vary with bucket. Refer to Operating Specifications chart.

DimensionsAll dimensions are subject to change without notice.

18

2

11

6

317

10

7

9

8

12

13

16

15

14

41

5

20 973C Track Loader specifications

Rated bucket capacity †(Nominal heaped)

Struck capacity †

Bucket width – overall

Bucket weight

Dump clearance at full lift and 45° discharge †

Reach at 45° discharge angleand 2133 mm (84 in) clearance †

Reach at full lift and 45° discharge

Digging depth †

Maximum rollback at ground

Maximum rollback at carry position

Bucket height in carry position

Overall machine lengthBucket level on ground

Overall machine height with bucket at full raise

Static tipping load

Breakout force – with tilt cylindersBucket level at ground

Operating weight*

2.8 3.2 3.2 3.2 2.5 2.6 2.9 2.93.66 4.19 4.19 4.19 3.66 3.4 3.79 3.79

2.41 2.77 2.77 2.46 2.46 2.19 2.56 2.563.15 3.62 3.62 3.22 3.22 2.86 3.35 3.35

2845 2845 2845 2934 2705 2710 2762 2710112 112 112 116 107 107 109 107

1745 2103 1988 1914 1974 2755 3027 30123,848 4,638 4,384 4,221 4,353 6,074 6,673 6,640

3358 3154 3281 3154 3032 3049 2828 2966132 124 129 124 119 120 111 116

1992 2096 2031 2096 2009 1832 1936 187178 82 80 82 79 72 76 73

1313 1482 1357 1482 1451 1261 1403 129351 58 53 58 57 49 55 50

92 143 122 92 92 200 254 2303.6 5.6 4.8 3.6 3.6 7.9 9.1 9.0

42° 43° 43° 43° 43° 45° 46° 46°

50° 50° 50° 50° 50° 51° 51° 51°

505 505 505 505 505 602 602 60220 20 20 20 20 24 24 24

7092 7362 7175 7362 7541 7333 7591 7415279 290 282 290 297 289 299 292

5692 5692 5692 5692 5742 5801 5801 5801224 224 224 224 226 228 228 228

20 249 19 747 19 908 — 20 010 19 195 18 786 18 84244,649 43,542 43,897 — 44,122 42,318 41,416 41,539

213.3 194.5 195.7 — 181.3 173.9 159.7 161.147,992 43,762 44,032 — 40,792 39,127 35,932 36,247

26 373 26 731 26 616 26 542 26 602 27 432 27 704 27 68958,153 58,941 58,688 58,525 58,657 60,477 61,077 61,044

m3

yd3

m3

yd3

mmin

kglb

mmin

mmin

mmin

mmin

Deg

Deg

mmin

mmin

mmin

kglb

kNlb

kglb

General purposebucket

Rockbucket

Bare

8, Bolt-onlong teeth

& segments

Bolt-on cuttingedge

8, Weld-onlong teeth

8, Weld-onlong teeth

* Includes coolant, lubricants, full fuel tank, ROPS cab, bucket and 75 kg/165 lb operator.† Specifications and ratings conform to all applicable standards recommended by the Society of Automotive Engineers.

SAE Standard J732 JUN92 and SAE Standard J742 FEB85 govern loader ratings.

Ripper with 3 shanks (bumper removed) +672 kg +1,482 lb +208 kg +458.6 lb

Rear bumper (removal) –572 kg –1,261 lb –1339 kg –2,952.5 lb

Change InOperating Weight

Change In StaticTipping Load

NOTE: Machine stability can be affected by the addition of other attachments. Add or subtract to/from machine operating weight and static tipping load. English measurements obtained from converting metric to English and rounding off.

Operating Specifications

Bare

8, Bolt-onlong teeth

& segments

Bolt-oncuttingedge

Multi-purposebucket

21973C Track Loader specifications

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

OPERATOR ENVIRONMENTAir conditionerArmrests, adjustableAshtray, lighter (24-volt)Cab, pressurized and sound suppressed

tinted glass, (ROPS/FOPS)Coat hookControl, single lever, pilot operated

for implement hydraulicsCup holderHeater and defrosterHornInstrumentation, gauges

Engine coolant temperatureFuel levelHydraulic oil temperaturePower train oil temperature

Instrumentation, alert indicatorsCharge filter bypassCharge oil pressureCheck engineElectrical charging (too high/too low)Engine oil pressureEther aid activatedFuel pressureHydrostatic drive systemLow fuelPump drive (splitter box) oil temperature

Key startMirror, review (internal)Parking brake switch, brake-on indicator lightRadio ready, 24-volt to 12-volt converter,

speakers, antenna, mounting bracketSeat, (cloth) air-suspension with side-to-side isolatorSeat belt, retractable, 50 mm (2 in)Sound Suppression, SpectatorSpeed mode switch, (Work-Travel)Storage compartments under armrests

(lockable on right armrest)Wipers/washers (front and rear)

Intermittent front wiper

ELECTRICALAlarm, back-upAlternator (24-volt, 65-amp)Batteries, 1100 CCA, high-output, maintenance freeElectronic Hydrostatic Control (EHC)Caterpillar Monitoring System (CMS)Lighting system (halogen), (4) – 2 forward, 2 rearPower outlet, 12-voltStarting motor, 24-volt electric

POWER TRAINAdjustable steering pedalBlower fanEngine, Cat C9 engine with ACERT® Technology,

direct injection, ATAAC, turbocharged, with ADEM™ A4 controller

Filters, air (radial seal)Fuel priming pump, electricMufflerPre-cleaner, air intakeRadiator guard, HD, perforated, swing-out, latched grill

UNDERCARRIAGESprocket guardsSprocket rims, replaceable bolt-on Tough Steel segmentsTrack, Caterpillar EWL (Extended Wear Life) sealed and

lubricated (40) sectionsTrack adjuster, hydraulicTrack guiding guards, end sectionTrack roller guardTrack idlers, lifetime lubricatedTrack rollers (7), one upper carrier roller

lifetime lubricatedTrack roller frame, oscillatingTrack shoes, 500 mm (20 in), double grouser,

extreme service

OTHER STANDARD EQUIPMENTBottom GuardBucket positioner, automaticBumper, rearCoolant, extended lifeCooler, hydraulic oilCrankcase guard, fullEngine enclosure, lockable doorsHitch, front retrievalLift kickout, automaticStarting Aid, etherVandalism protection – fuel tank cap and radiator cap

with padlocksXT™ HosesHydraulic Oil, HYDO Advanced 10

22 973C Track Loader specifications

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

Controls (for equipment hydraulic system)Two-lever control3rd valve for use with lines for front and rear attachmentsDiverter valve for use when both front and rear lines

are requiredCounterweights – 2 arrangements

MediumHeavy

Drawbar hitchGuards:

Cab lightsIdlerLift cylindersSeal protection – final drive, pivot shaft, and idler seals

Product linkRipper/scarifier, three ripper shanks (bumper removed)Starting aids:

Engine coolant heater, 120- or 220-voltTrack shoes:

500 mm (20 in) double bar grouser, RBT675 mm (27 in) double bar grouser, RBT

Anti-theft, Machine Security System (MSS)Buckets:

General Purpose (GP) 2.8 m3 (3.6 yd3)General Purpose (GP) with weld-on flush-mounted

adapters 2.8 m3 (3.7 yd3)Multi-purpose (MP) 2.9 m3 (3.8 yd3)

Bucket cutting edge, reversible, with end bits, sharpened, bolt-onGP bucketMP bucket

Rock with 8 weld-on, flush mounted adapters, spade spade cutting edge 2.5 m3 (3.2 yd3)

Bucket edge segments, bolt-on, for GP and MP bucketsBucket teeth, set of 8 bolt-on adapters and tips (K90), includes

corner adaptersGeneral duty, for GP bucketGeneral duty, for MP bucketExtra duty, for GP bucketExtra duty, for MP bucketPenetration, for GP bucketPenetration, for MP bucket

Bumper (removed)

973C Track Loader specifications 23

Notes

R

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

© 2008 CaterpillarAll Rights Reserved

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.

CAT, CATERPILLAR, ACERT, SAFETY.CAT.COM, their respective logos, “Caterpillar Yellow,”and the POWER EDGE trade dress, as well as corporate and product identity used

herein, are trademarks of Caterpillar and may not be used without permission.

AEHQ5678-03 (9-08)

Replaces AEHQ5678-02

973C Track Loader