973C

Track Loader

Engine Engine Model Net Flywheel Power

Cat C9 178 kW

Weights Operating Weight 239 hp

26 373 kg

58,142 lb

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

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

973C Track Loader

Leading edge design, state-of-the-art technology and unmatched versatility in one machine allows maximum productivity.
Engine The new Cat C9 ATAAC diesel engine retains the reliability, durability and performance of its predecessor, while adding the benefits of Caterpillar ACERT Technology for compliance with the stringent Tier 3/Stage IIIA emission standards. pg. 4 Hydrostatic Drive The hydrostatic drive with electronic control provides precise modulation for quick, smooth operation and superior maneuverability. Shorter cycle times, high efficiency, and excellent maneuverability result in increased productivity. pg. 6 Caterpillar Monitoring System (CMS) The Caterpillar Monitoring System with flashable memory, monitors the hydrostatic and electrical systems and provides the operator instant feedback on the machine conditions. pg. 7

Undercarriage Improved traction, increased machine stability and reduced frame impact are benefits of the Cat oscillating undercarriage. The Cat sealed and lubricated track reduces pin and internal bushing wear, reduces component friction and track noise, extending track life. pg. 12

Special Application Arrangements Special arrangements Waste Handling/ Demolition, Steel Mill, Wide Gauge and more, are available or can be designed on request to allow the 973C to work in the toughest conditions. pg. 14

Top Performance. A machine designed to be productive over a wide range of tough applications from heavy clearing to high-volume truck loading, from the slag pits of steel mills to big city landfills. The 973C not only can master the toughest excavation but can also finish grade with delicate precision. Reliable, durable, rugged construction, selfdiagnosis of electrical and power train systems, and easy maintenance help ensure extended service life.

Operator Station The C-Series Track Loader is designed for operator comfort, convenience, and productivity. Sound suppressed ROPS cab, heating and air conditioning, an adjustable air-suspension seat with sideto-side isolator, and pilot hydraulic implement controls help reduce operator fatigue. pg. 8

Structure The box-section mainframe is designed specifically for the work of the track loader. It provides durability, resistance to twisting and a solid base for all components. The dual Z-bar linkage offers increased breakout force and fast dump speed for enhanced productivity. pg. 10

Work Tools A large choice of buckets, Ground Engaging Tools (GET), and attachments, allow configuration of the 973C for maximum performance in virtually any job. pg. 11

Serviceability The 973C design offers reduced maintenance, convenient access to components, easy diagnostic capabilities, as well as easy and economical component replacement possibilities. Cat dealers also provide quick parts availability. pg. 15

Total Customer Support Your Caterpillar dealer offers a wide range of services which can be set up with a Customer Support Agreement. A customized plan, from PM service to total machine maintenance, with flexible financing, allows for optimal return on investment. pg. 16

New Feature 3

Engine
Provides power, reliability and acts as a working counterweight in the rear of the machine, for optimum balance.
ADEM A4. The ADEM A4 electronic controller is the brain of the engine and contains the engines control software. All the sensors are remote-mounted and connected to the main module. The main concept behind ACERT is advanced combustion. ACERT technology begins with ADEM A4. This electronic brain regulates fuel delivery, airflow and other engine functions. The controller directs the HEUI injectors to deliver multiple injections of fuel during the engines compression stroke. The C9 features ADEM A4, the most advanced 32-bit Electronic Engine Control available. ADEM A4 offers greater processing speeds and memory than ADEM III. It offers a variety of fuel maps to optimize ACERT technology for better performance and efficiency. Fuel System. Hydraulically actuated electronic fuel injection is a Cat exclusive technology and has a proven track record. The HEUI design has been refined and now supplies multiple injections of fuel during the engines compression stroke. With multiple injection, fuel is introduced to the combustion chamber in a number of controlled microbursts, rather than all at once, so it precisely regulates the combustion cycle. The improved HEUI design also offers improved combustion and fuel delivery. An added benefit of this is better control of engine sound and vibration levels.The HEUI system continues to offer excellent reliability because it has fewer moving parts than mechanical unit injection and requires very few adjustments, reducing maintenance costs and increasing machine availability. Design. The fuel system design eliminates external high-pressure fuel lines, providing efficient, precise fuel delivery, and timing.

C9 Diesel Engine. The Cat C9 is an 8.8 liter (537 in3) displacement, sixcylinder, in-line configured engine with hydraulically actuated electronic fuel injection. It uses ACERT Technology, a series of Caterpillar engineered innovations that provide advanced electronic control, precision fuel delivery and refined air management, resulting in outstanding performance and lower emissions. The Cat C9 with ACERT Technology meets the U.S. EPA Tier 3 and European Union Stage IIIA emissions standards, which dramatically restrict the emission of nitrogen oxide and other pollutants in an 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 Technology is based on the proven Cat C-9 Tier 2/ Stage II engine with thousands currently in operation. It offers a compact design with big, heavy-duty engine features for outstanding durability, reliability and performance. The cylinder head features a new cross-flow air design with four valves per cylinder and updated port geometry. The improved intake port geometry provides smoother transitions and less flow restrictions. The C9 uses mid-support wet cylinder liners, which are easily removed for service. A two-step honing process is used for cutting deep grooves for oil retention.

Serviceability. Unit injectors can be serviced individually, without the need to service the whole fuel system. Turbocharger and Aftercooler. The turbocharger is a wastegate design with a new titanium compressor wheel. The titanium wheel is better able to withstand the stress and wear of highspeed operation. This new turbocharger is well-matched to the air-to-air aftercooler resulting in high power. The exhaust driven turbocharger packs more air into the cylinders, while the air-to-air aftercooler cools the pressurized air from the turbocharger, making the engine intake air denser. The increased air in the cylinders results in more power, improved combustion, and reduced exhaust emissions.

Extended Life Design. The forged steel crankshaft increases strength and durability. It features induction hardened journals and fillets. The camshaft is made of carburized and heat-treated steel for excellent durability. The pistons feature an articulated two-piece design. The forged steel crown is stronger than aluminum and allows more flexibility in the ring position. Starting System. The ADEM A4 controller controls the electric starter motor and the starter relay. The ADEM A4 prevents fuel from being supplied for starting until sufficient oil pressure is present. This prevents wear on the bearings due to operating without adequate lubrication. Engine Installation. The engine is installed using rubber mounts to reduce the transfer of engine vibration to the frame and cab, lowering operator vibration, sound levels, and fatigue. Rear Engine Location. Rear engine location allows excellent forward visibility, while serving as a working counterweight. Helps reduce radiator plugging while providing easy service access to the engine and other major components.

Cooling System. Incorporated into a single-plane cooling unit are the engine radiator, the hydraulic and power train oil coolers, and the air-to-air aftercooler. Wide fin spacing for Trash Resistance and swing-out latched grille for easy cleaning are now standard equipment.

Hydrostatic Drive
The electronically controlled hydrostatic drive helps provide quick response for shorter cycle times and increased productivity.
Pumps and Drive Motors. Variable displacement pumps and variable displacement drive motors are electronically controlled by the EHC, offering high efficiency and precise travel. Each track is independently driven by a separate hydraulic circuit consisting of one variable displacement pump, connected by Cat XT-6 hydraulic hose and couplings to a variable displacement piston motor. Separate Hydraulic Pumps. Separate hydraulic pumps offer easy servicing. Maneuverability. Independent power is provided to each track, which provides great maneuverability, speed, and side slope operation. Controlling independent power and speed for each track allows the operator to maintain full power to both tracks while turning, achieving a Power Turn. Power Turns allow increased productivity when dozing or backfilling. For additional maneuverability, the operator can use counter rotation, which allows spot turns in tight locations. Travel Speeds. Travel speeds are infinitely variable between zero and top speed. Two speed modes, travel mode and work mode, provide two different speed ranges to best match machine speed and torque to the job conditions for maximum productivity. Maximum travel speed is increased to 10 kph (6.2 mph) when the travel/work mode switch is in the travel position. In addition, switch between travel and work positions takes effect immediately.

Shifting. The hydrostatic drive eliminates the need for transmission shifting, which allows the operator to concentrate on working, maneuvering, and production. Machine Speed. The Electronic Hydrostatic Control (EHC) automatically adjusts machine speed to give the equipment hydraulic system priority, while the hydrostatic system takes advantage of all remaining engine power.

Electronic Hydrostatic Control (EHC). The EHC maintains engine rpm in optimum operating range and balances the two track drive systems for straight travel without machine drift. Caterpillar Monitoring System (CMS). The EHC interfaces with the CMS for system diagnostics and calibrations. It is self diagnosing, and fully compatible with Electronic Technician (Cat ET) software. This allows quick and easy calibrations and troubleshooting.

Caterpillar Monitoring System (CMS)

The Caterpillar Monitoring System offers three main functions.

Caterpillar Monitoring System Functions. The CMS offers three main functions. 1) Quick and simple calibration of the hydrostatic drive system. 2) Prevention of damage by alerting the operator if a machine fault has occurred. 3) Monitoring of hydrostatic and electrical systems to aid service personnel in troubleshooting and repairs. Gauge Cluster. The gauge cluster contains four gauges, which monitor: Engine coolant temperature Power train oil temperature Hydraulic tank oil temperature Fuel level

Alert Indicators. The alert indicator cluster groups the individual alert indicators for: Low fuel pressure Low fuel Charge filter bypass High pump drive Low hydrostatic system charge pressure Low engine oil pressure Check engine detected by ADEM A4 Low/high alternator output System warning for hydrostatic drive system Ether aid activated Digital Message Display. The digital display can show the operators choice of hour meter, engine rpm, odometer, or service codes. Service Mode. When in service mode, service codes from the EHC are shown on the Digital Message Display. The service code information is transferred via the Cat Data Link from the EHC to the main display module. Three Level Warning System. CMS also functions as a warning system with three levels of warning. CMS Self Test. The CMS self-test verifies that the main display module is operating properly every time the key start switch is turned from the off to theon position.

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

1. Heating and Air Conditioning. The air circulation system delivers filtered, pressurized, and temperaturecontrolled air through 10 louvered vents. Air conditioning and heater are standard equipment. 2. Cat Comfort Series Seat. The Caterpillar air-suspension seat, with side-to-side isolator, is ergonomically designed and fully adjustable for maximum operator comfort and control. The backrest conforms to the operators spinal curve. The contoured base curves away from lower back to reduce pressure. Retractable seat belt is 76 mm (3 in) wide for positive, comfortable restraint. 3. Storage Space. Storage spaces include a lockable storage box, a lunch box compartment, beverage holder, and coat hook. 4. Armrests. Adjustable armrests can be positioned up or down. The right armrest is adjustable forward and backward. Each armrest can be inclined to different angles for excellent operator comfort and control. 5. Dashboard. The newly designed smooth, rounded dashboard with integral defroster vents, provides all the necessary functions and instrumentation within the operators normal line of sight.

6. Hydrostatic Drive System Controls. The hydrostatic drive system controls allow quick speed and directional changes from a single control lever for maximum maneuverability. Pedal steering allows precise control of each track independently, with on demand counter rotation. The brake pedal supplements dynamic hydraulic braking provided by the hydrostatic drive system. 7. Speed Switches. The speed mode switch allows the operator to choose between work mode and travel mode or maximum drive speed, to best match the machine speed to various job conditions. The electronic engine speed selector switch is used by the operator to set engine rpm. 8. Pilot Operated Controls. Pilot operated implement controls allow easier operation and greater productivity. Choice of single-lever pilot control (standard) or two-lever (optional) is available for bucket lift and dump. Adjustable automatic lift and bucket position kickout allow the operator to concentrate on positioning the machine, resulting in higher productivity.

9. Viewing Area. The viewing area includes tinted glass to reduce glare and provides excellent visibility to the bucket, tracks, and around the engine enclosure to the rear. Sunvisor, windshield wipers and washers are all standard features on the cab. The front wiper has variable speed, intermittent control. 10. Rearview Mirror. The rear view mirror is located above the front windshield, maximizing the operators visibility.

Adjustable Steering Pedals. The total travel of the steering pedals is 23 but the angle can be adjusted from 35 to 50.

Structure
The box-section mainframe is designed to handle heavy loads, while the dual Z-Bar linkage maximizes breakout force, while distributing stress loads to the mainframe.
Durability. Structures are designed to provide durability and extended service life to support multiple rebuilds. Straddle Mounting. Straddle mounting supports all lift arm pivot points on both ends of the pin eliminating twisting forces and enhancing structural durability. Z-Bar Linkage. Breakout force is exceptionally high due to the mechanical advantage of Z-bar linkage design, and hydraulic pressure applied to the head end of the tilt cylinders. Using dual tilt cylinders and linkage provides the operator a better view of the work area, bucket, and cutting edge. Sealed Loader Linkage. The 973C linkage has fewer grease points compared to other linkage designs because many pin joints are sealed to keep dirt out. Fewer grease points and sealed pins means less downtime for maintenance allowing more working hours between servicing. Simultaneous Lift and Dump. Simultaneous lift and dump for fast truck loading and smooth grading, and the ability to meter material from bucket. Lift Kickout. Adjustable automatic lift kickout and bucket positioner allow the operator to concentrate on positioning the machine rather than the bucket. This results in greater productivity. Lift Arms. The two arms are welded into a single unit, using a weld-fabricated cross-tube. The fabricated cross-tube and tilt lever, use forgings at high stress points to spread the loads for long life.

Mainframe and Loader Tower. The mainframe and loader tower is a single, welded fabrication with castings and forgings incorporated at points of high stress to distribute those stresses over wide areas for a long structural life. Design. Strong box-section mainframe design, with continuous, deep-penetration welds resist twisting loads to protect components from excessive wear or damage without adding extra weight to the machine. The frame rails consist of two box sections, which are joined at the rear by a box-section cross member. Mounting points for the final drives, pivot shafts, and operators platform are integrated into each mainframe side rail.

Four-Plate Loader Tower. The four-plate loader tower is integral with the basic mainframe. The loader tower distributes forces evenly from the lift arms to the mainframe, which eliminates twisting for maximum structural durability. The loader tower provides solid mounting points for lift arms, lift cylinders, and Z-Bar tilt cylinders. Castings. Steel castings (shown in red) are used in areas of high stress concentration. Large radius curves dissipate stresses that could cause fatigue and cracking. Steel Frame. Fatigue resistant steel frame sections along with castings provide flexibility, durability and excellent resistance to impact loads.

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Work Tools
A variety of attachments and Ground Engaging Tools (GET) are available to maximize performance in any application.
Versatility. The large variety of tasks an operator can perform with the standard machine and attachments has lead to the Caterpillar track loaders reputation for versatility. Ripper-Scarifier. The ripper-scarifier adds extra versatility to expand the application of the machine. Hinged-type, with three shanks, beam mounted with two pins pressed into each side of the mainframe. Raised and lowered with two wide-mounted cylinders. Six-pin linkage requires no lubrication. Bucket Protection Options. Caterpillar offers several types of adapters, tips, and cutting edges, which increase bucket life and maximize performance. (1) Bolt-on adapters, tips, and bolt-on reversible edge segments provide a clean working floor and increase bucket capacity. Heavy-duty segments are available with 62 percent more wear material than standard segments. (2) Bolt-on, 2-strap adapters, and tips, including corner adapters, offer excellent penetration. (3) Bolt-on, reversible, cutting edges are ideal when penetration is not a consideration, such as in clean work or stockpiling applications. (4) Weld-on, top-strap adapters are also available with a GP bucket. They are flush-mounted with the bottom of the cutting edge to provide a smooth bucket bottom and unrutted work surface. These adapters can be used with any of the tip options (not with a bolt-on protection system). Tip Options. Caterpillar GET offers a variety of tips to better accommodate your needs in any working environment, whether that is high impact or generalpurpose applications. K Series Tooth System. The new K Series tooth system matches customer requirements of longer life, improved performance, greater reliability and ease of removal and installation.

General Purpose Bucket. The General Purpose (GP) bucket is designed for excellent loadability and long life in applications such as hard bank excavating, stripping, and stockpile loading. High-strength, low alloy steel helps the bucket resist dents and abrasions. Shell-tine reinforcements support the rear of the bucket for increased structural strength. Multi-Purpose Bucket. The Multipurpose (MP) bucket is designed for a broad range of applications, such as loading, stripping, clearing, bulldozing, picking up debris, and fine grading. The bucket clamps hydraulically to grip logs or handle other tough-to-grasp materials. Extreme-Service Multi-Purpose Bucket. Offered as an attachment, the extremeservice Multi-purpose bucket has the same load capacity as the Multi-Purpose bucket. The reinforced hinges, thicker side-plates, and reinforced spill-plate are designed into the extreme-service Multi-Purpose bucket for situations where the stresses can exceed the design objectives of the standard MP bucket.

Slag Bucket. The Slag bucket is specially designed to meet the unique challenges presented by slag handling applications. Designed for continuous heavy-duty work in hot slag, the thicker material absorbs slag heat which virtually eliminates bucket distortion. Landfill Multi-Purpose Bucket. The Landfill Multi-Purpose (MP Landfill) bucket combines the versatility of a Multi-Purpose bucket with the performance of a Landfill design. Constructed with a trash-rack for increased capacity, extra strength and better load retention. Ideal for applications in the harsh refuse market, whether digging or spreading material at the landfill or grasping and loading refuse at a transfer station. The clamping action of the front section gives the bucket the ability to load material, doze with the straight side of the dozer, grab bulky items with the clamp or control the discharge of fill/cover material.

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Undercarriage
Keeps more track on the ground for maximum traction and stability. Several shoe options provide best match to job conditions.
Track and Carrier Rollers. Seven track rollers spread the machine weight over a larger area. This improves stability and provides a more comfortable ride for the operator. Two upper carrier rollers on each side mount to the machine mainframe. This mounting arrangement helps resist mud packing of the undercarriage. Track Adjuster. The track adjuster and mechanical recoil system uses a large recoil spring and grease filled adjustment cylinder, which allows the idler to move forward and back to maintain proper track tension as it absorbs undercarriage shock loads. Swing-Link Idler. Permits horizontal idler movement, absorbing shock loads and maintaining proper track tension, while eliminating the need for shims and wear strips. The removal of wear strips eliminates a point of service and maintenance. Cat idlers provide superior structural support.

Undercarriage. The oscillating track roller frame design decreases ground induced impact loads to the machine, increases machine stability on rough terrain, and provides a smoother, more comfortable ride for the operator. Pivot Shaft. Steel pivot shafts attach the rear ends of the track roller frames to the loader mainframe and carry most of the weight. The pivot shafts transfer ground induced shock loads from the track roller frames to the loader mainframe rather than through the final drives. The result is longer final drive life.

Equalizer Bar. The equalizer bar is pinned in its center to the machine mainframe and at the ends to each track roller frame. This allows the forward ends of the track roller frames to oscillate, or move vertically, to keep more track on the ground in uneven underfoot conditions. The equalizer bar also provides a more stable work platform for the operator, who will be comfortable working at faster speeds for increased productivity. Track Roller Frame. The track roller frames are a welded, box section design, similar to the box section design of the mainframe and loader tower, which provides strength and resistance to bending without adding extra weight.

Sealed and Lubricated Track. Sealed and lubricated track keeps maintenance costs down by reducing pin and internal bushing wear, which can extend the life of the track and the undercarriage components. Lubricating the pin helps reduce component friction for less track noise and greater power train efficiency.

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3. Single Grouser Shoes. Single grouser shoes increase penetration and traction in lower impact and lower abrasion conditions. 4. Chopper Shoes. Chopper shoes are single grouser shoes with trapezoidal center hole and additional diagonal side grousers for increased chopping ability. Recommended for landfills, transfer stations and demolition applications. Track Links. The standard track links are the newest generation of Extended Wear Life (EWL) track. Included is more wear material for longer track life. A two-piece, split master link allows easy track removal and installation. Sprockets. The Tough Steel sprocket segments extend sprocket segment life. The five segments are bolted onto each final drive sprocket hub. Segments can be removed or replaced without breaking the track. Driven by every second sprocket tooth, the track chain makes two complete revolutions before each tooth contacts a bushing once. The result is long, even wear of the sprocket teeth. Extreme Service Shoes. Extreme service shoes are available with more hardened wear material for longer wear life and higher impact applications. Wider Shoes. Wider shoes are also available to reduce ground pressure in soft underfoot conditions.

Shoe Options. There are several shoe options to choose from with the Caterpillar oscillating undercarriage. Wide, double grouser is now standard. Consult your Caterpillar dealer for more information. 1. Double Grouser Shoes. The standard double grouser shoes are designed for good traction, easy turns, and reduced bending. 2. Trapezoidal Center Hole Shoes. Trapezoidal center hole shoes let the sprocket push out dirt and debris, to reduce packing between the shoe and the bushing.

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Special Application Arrangements

Special arrangements are available, or can be designed on request, to allow the 973C to work in special applications.
Wide Gauge Arrangement. The Wide Gauge 973C is designed for work in very soft underfoot conditions. For enhanced flotation and stability, the track gauge has been widened and wider track shoes installed. The larger track shoes increase the ground contact area for reduced ground pressure. Additional Arrangements. Many other arrangements are available. For other custom-designed arrangements for specific applications, contact your Caterpillar Dealer.

Waste Handling/Demolition Arrangements. Waste Handling/ Demolition arrangements provide added versatility and are designed to make the 973C perform well in sanitary landfills, waste handling or demolition applications where the machine spreads, compacts, sorts, shreds and crushes materials.

Steel Mill Arrangement. Steel mill arrangements allow the 973C to play a key role in the mills production. The compact stature and maneuverability of the 973C is well suited for working and traveling in a mill. Special guarding for the operator, machine, and hydraulics are added. Equipped with a Steel Mill/ Slag bucket it has the durability and breakout force to handle the hot slag.

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Serviceability
Simplified service and extended service intervals means more productive uptime.

Service Intervals. The time between fluid and filter service intervals has been significantly increased, minimizing downtime and maximizing productivity for the 973C.

Reduced Maintenance. The 973C has many service features incorporated in the machine including: Caterpillar Extended Life Coolant for extended change intervals. Sealed electrical connectors lock out dust and moisture. Caterpillar XT hydraulic hose, in medium and high-pressure circuits, provide high abrasion resistance and far exceed industry standards. O-Ring Face Seals (ORFS) hydraulic couplings help eliminate fluid leaks, provide positive seals, and are reusable for lower operating costs. Removable floor panels in the cab to access the engine, and hystat and implement pumps. Extended change intervals for engine and hydraulic/hystat oil. Scheduled Oil Sampling Fluids Analysis helps avoid unnecessary downtime. Easy Component Access. The rear engine design and large engine access doors make it easy to reach the engine, electrical components, hydrostatic system, and batteries. Hydraulic and fuel filters are located close to each other. Removable cab floor panels create easy access to internal components. The hydrostatic drive system features separate pumps and motors for low replacement or rebuild cost. All lubrication points are accessible from ground level. The swing-out latched grille, now standard, reduces downtime and 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 located inside the right access door for ease of access. Water Seperator and Fuel Filter. The water separator and fuel filter are located inside the rear right access door for ease of access and serviceability. Product Link. This option allows the customer or dealer to obtain machine diagnostics and location from their offices. Product Link provides updates on service meter hours, machine condition, machine location, and integrated mapping/route planning. Easy Diagnosis. The Caterpillar Monitoring System and self-diagnosing Electronic Hydraulic Control (EHC) work together to warn against both occurring and impending faults to reduce downtime. The electrical wiring is color-coded and numbered for easy diagnosis and repair. Serviceability. Centralized draining point for splitter box, engine and power train allow to even more improved serviceability of the 973C.

Fluid taps make oil sampling easier.

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Total Customer Support

Your Caterpillar dealer offers a wide range of services which can be set up with a Customer Support Agreement. A customized plan, from PM service to total machine maintenance, with flexible financing, allows for optimal return on investment.
Service Capability. Whether in the dealers fully equipped shop or in the field, you will get trained service technicians using the latest technology and tools. Selection. Make detailed comparisons of the machines you are considering before you buy. How long do components last? What is the cost of preventive maintenance? What is the true cost of lost production? Your Cat Dealer can give you answers to these questions. Purchase. Consider the financing options available as well as day-to-day operating costs. This is also the time to look at dealer services which can be included in the cost of the machine to yield lower equipment owning and operating costs over the long run. Maintenance. More and more equipment buyers are planning for effective maintenance before buying equipment. Choose from your dealers wide range of maintenance services at the time of your purchase. Repair option programs guarantee the cost of repairs up front. Diagnostic programs such as Scheduled Oil Sampling and Technical Analysis help avoid unscheduled repairs. Product Support. Your Cat Dealer offers a wide range of services which can be set up with a Customer Support Agreement. The dealer can customize a plan for you, from PM service to total machine maintenance, allowing you to optimize your return on investment. Remanufactured Components. Save money with remanufactured parts. They offer the same warranty and reliability as new products at a cost savings of 40 to 70 percent. Replacement. Repair, rebuild, or replace? Your Cat Dealer can help evaluate the cost involved so you can make the right choice. Operation. Improving operating techniques can boost your profits. Your Cat Dealer has training videotapes, literature, and other ideas to help you increase productivity.

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Engine
Engine Model Net Flywheel Power Net Power Caterpillar Net Power ISO 9249 Net Power SAE J1349 Net Power EEC 80/1269 Bore Stroke Displacement Cat C9 178 kW 178 kW 178 kW 178 kW 178 kW 112 mm 149 mm 8.8 L 239 hp 239 hp 239 hp 239 hp 239 hp 4.41 in 5.87 in 537 in3

Drive System
Type Hydrostatic drive with infinite machine speeds up to 10 km/h (6.2 mph) Two, variable-displacement, slipper-type axial piston pumps Two, variable-displacement, bent axis piston motors 44 000 kPa 6,380 psi

Drive Pump Track Motor Relief Valve Setting

Cat C9 engine with ACERT Technology to meet U.S. EPA Tier 3 (Jan 2006), European Union Stage IIIA 97/68/EC (Jan 2006) and Japan Ministry of Land, Infrastructure and Transport (Oct 2006) emissions. Engine ratings at 2,150 rpm. Net power advertised is the power available at the flywheel when the engine is equipped with fan, air cleaner, muffler, and alternator. No derating required up to 4572 m (15,000 ft) altitude.

Hydraulic System Equipment

Type Output Main Relief Valve Setting Lift Cylinders Bore Lift Cylinders Stroke Tilt Cylinders Bore Tilt Cylinders Stroke Vane 335 L/min 19 000 kPa 165 mm 935 mm 140 mm 633 mm 88.5 gal/min 2,755 psi 6.5 in 36.8 in 5.5 in 24.9 in

Undercarriage
Track Shoe Type Track Shoe Width Standard Track Shoe Width Optional Track Rollers Each Side Number of Shoes Each Side Track on Ground Ground Contact Area Standard Shoe Ground Contact Area Optional Shoe Ground Pressure Standard Shoe Ground Pressure Optional Shoe Grouser Height Double Grouser Track Gauge Double Grouser, Extreme Service 500 mm 19.7 in 675 mm 26.6 in 7 40 2930 mm 115 in 2 2.93 m 4,542 in2 2 3.96 m 6,138 in2 88.3 kPa 12.8 psi 65.3 kPa 9.4 psi 49 mm 1.93 in 2080 mm 82 in

Hydraulic System Pilot

Output Maximum Relief Valve Setting Cycle Time Raise Cycle Time Dump Cycle Time Lower, Empty, Float Down 12 L/min 3.2 gal/min 2400 kPa 348 psi 6.7 Seconds 5.1 Seconds 2.9 Seconds

Service Refill Capacities

Fuel Tank Cooling System Crankcase (with Filter) Final Drives (each) Hydraulic Tank Pump Drive Box Pivot Shaft Hydraulic System Hydrostatic Drive System 430 L 43 L 29 L 28.5 L 67 L 3.8 L 3L 169 L 83 L 113 gal 11 gal 7.66 gal 7.5 gal 17.7 gal 1 gal 0.8 gal 44.6 gal 21.9 gal

Wide Gauge Arrangement available for lower ground pressure applications. Ground pressure is calculated using operating weight of machine with GP bucket, teeth and segments.

973C Track Loader specifications

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Electrical System
Type Battery Capacity Battery Voltage Battery Quantity Alternator 24V DC 1100 CCA 12 2 65-amp, Heavy-duty Brushless

Ripper Specifications
Type Number of Pockets Overall Width/Beam Shank Cross Section Ground Clearance Penetration Ripping Width Cylinders Bore Cylinders Stroke Addition to Machine Length due to Ripper (in Transportation Position) Radial 3 2200 mm 74 175 mm 670 mm 428 mm 2000 mm 127 mm 365 mm 1875 mm

Weights
Operating Weight 26 373 kg Shipping Weight Without Bucket 24 263 kg 58,142 lb 53,490 lb

86 in 2.9 6.9 in 26 in 17 in 78.74 in 5 in 14.4 in 73.8 in

Operating Weight: Includes coolant, lubricants, 100% fuel tank, ROPS/FOPS cab, General Purpose Bucket with long bolt-on teeth and segments and 75 kg (65 lb) operator. Shipping Weight: Includes coolant, lubricants, 10% fuel tank, ROPS/FOPS cab and no bucket.

Standards
ROPS (Rollover Protective Structure) offered by Caterpillar for 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.

Buckets
Capacity General Purpose Capacity Multi-Purpose Bucket Width General Purpose Bucket Width Multi-Purpose 3.2 m3 2.9 m3 2845 mm 2710 mm 4.19 yd3 3.79 yd3 112 in 107 in

Brakes meet the standard SAE J1026 APR90, ISO 10265:1998. The operator sound exposure Leq (equivalent sound pressure level) measured according to the work cycle procedures specified in ANSI/SAE J1166 MAY90 is 85 dB(A), for cab offered by Caterpillar, when properly installed and maintained and tested with the doors and windows closed. Hearing protection may be needed when operating with an open operator station and cab (when not properly maintained or doors/windows open) for extended periods or in a noisy environment.

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

The exterior sound power level for the standard machine meets the sound directive 2000/14/EC.

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973C Track Loader specifications

Dimensions
All dimensions are subject to change without notice.

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12 11 15 3 17 18 9 8 2 6 1 4 5 7 10 14

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Overall machine width without bucket: with standard tracks 500 mm (19.7 in shoes) with wide tracks 675 mm (26.6 in shoes) 2 Ground clearance from face of shoe Grading angle 3 Machine height to top of cab 4 Length to front of track 5 Overall machine length 6 Carry position approach angle 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 13 Maximum rollback, fully raised 14 Dump clearance at full lift height and 45 discharge 15 Height to bucket hinge pin 16 Overall machine height, bucket fully raised 17 Height to top of seat with headrest 18 Height to top of stack

2580 mm (102 in) 2755 mm (108.46 in) 457 mm (17.9 in) 69 3500 mm (137.8 in) 5178 mm (203.8 in)

N
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N N N N N
45 (46 max.) 58

N
4235 mm (166.7 in)

N
2970 mm (117 in) 2989 mm (118 in)

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

973C Track Loader specifications

19

Operating Specifications
General purpose bucket
8, Bolt-on long teeth & segments 3.2 4.19 2.77 3.62 2845 112 2103 4,638 3154 124 2096 82 1482 58 143 5.6 43 50 505 20 7362 290 5692 224 19 747 43,542 194.5 43,762 26 731 58,941 Bolt-on cutting edge 3.2 4.19 2.77 3.62 2845 112 1988 4,384 3281 129 2031 80 1357 53 122 4.8 43 50 505 20 7175 282 5692 224 19 908 43,897 195.7 44,032 26 616 58,688

Rock bucket
8, Weld-on 8, Weld-on long teeth long teeth

Multi-purpose bucket
8, Bolt-on long teeth & segments 2.9 3.79 2.56 3.35 2762 109 3027 6,673 2828 111 1936 76 1403 55 254 9.1 46 51 602 24 7591 299 5801 228 18 786 41,416 159.7 35,932 27 704 61,077 Bolt-on cutting edge 2.9 3.79 2.56 3.35 2710 107 3012 6,640 2966 116 1871 73 1293 50 230 9.0 46 51 602 24 7415 292 5801 228 18 842 41,539 161.1 36,247 27 689 61,044

Bare Rated bucket capacity (Nominal heaped) Struck capacity Bucket width overall Bucket weight Dump clearance at full lift and 45 discharge Reach at 45 discharge angle and 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 length Bucket level on ground Overall machine height with bucket at full raise Static tipping load Breakout force with tilt cylinders Bucket level at ground Operating weight* m3 yd3 m3 yd3 mm in kg lb mm in mm in mm in mm in Deg Deg mm in mm in mm in kg lb kN lb kg lb 2.8 3.66 2.41 3.15 2845 112 1745 3,848 3358 132 1992 78 1313 51 92 3.6 42 50 505 20 7092 279 5692 224 20 249 44,649 213.3 47,992 26 373 58,153

Bare 3.2 4.19 2.46 3.22 2934 116 1914 4,221 3154 124 2096 82 1482 58 92 3.6 43 50 505 20 7362 290 5692 224 26 542 58,525 2.5 3.66 2.46 3.22 2705 107 1974 4,353 3032 119 2009 79 1451 57 92 3.6 43 50 505 20 7541 297 5742 226 20 010 44,122 181.3 40,792 26 602 58,657 2.6 3.4 2.19 2.86 2710 107 2755 6,074 3049 120 1832 72 1261 49 200 7.9 45 51 602 24 7333 289 5801 228 19 195 42,318 173.9 39,127 27 432 60,477

* 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) Rear bumper (removal)

Change In Operating Weight +672 kg +1,482 lb 572 kg 1,261 lb

Change In Static Tipping Load +208 kg +458.6 lb 1339 kg 2,952.5 lb

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.

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973C Track Loader specifications

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

ELECTRICAL Alarm, back-up Alternator (24-volt, 65-amp) Batteries, 1100 CCA, high-output, maintenance free Electronic Hydrostatic Control (EHC) Caterpillar Monitoring System (CMS) Lighting system (halogen), (4) 2 forward, 2 rear Power outlet, 12-volt Starting motor, 24-volt electric POWER TRAIN Adjustable steering pedal Blower fan Engine, Cat C9 engine with ACERT Technology, direct injection, ATAAC, turbocharged, with ADEM A4 controller Filters, air (radial seal) Fuel priming pump, electric Muffler Pre-cleaner, air intake Radiator guard, HD, perforated, swing-out, latched grill UNDERCARRIAGE Sprocket guards Sprocket rims, replaceable bolt-on Tough Steel segments Track, Caterpillar EWL (Extended Wear Life) sealed and lubricated (40) sections Track adjuster, hydraulic Track guiding guards, end section Track roller guard Track idlers, lifetime lubricated Track rollers (7), one upper carrier roller lifetime lubricated Track roller frame, oscillating Track shoes, 500 mm (20 in), double grouser, extreme service OTHER STANDARD EQUIPMENT Bottom Guard Bucket positioner, automatic Bumper, rear Coolant, extended life Cooler, hydraulic oil Crankcase guard, full Engine enclosure, lockable doors Hitch, front retrieval Lift kickout, automatic Starting Aid, ether Vandalism protection fuel tank cap and radiator cap with padlocks XT Hoses

OPERATOR ENVIRONMENT Air conditioner Armrests, adjustable Ashtray, lighter (24-volt) Cab, pressurized and sound suppressed tinted glass, (ROPS/FOPS) Coat hook Control, single lever, pilot operated for implement hydraulics Cup holder Heater and defroster Horn Instrumentation, gauges Engine coolant temperature Fuel level Hydraulic oil temperature Power train oil temperature Instrumentation, alert indicators Charge filter bypass Charge oil pressure Check engine Electrical charging (too high/too low) Engine oil pressure Ether aid activated Fuel pressure Hydrostatic drive system Low fuel Pump drive (splitter box) oil temperature Key start Mirror, review (internal) Parking brake switch, brake-on indicator light Radio ready, 24-volt to 12-volt converter, speakers, antenna, mounting bracket Seat, (cloth) air-suspension with side-to-side isolator Seat belt, retractable, 50 mm (2 in) Sound Suppression, Spectator Speed mode switch, (Work-Travel) Storage compartments under armrests (lockable on right armrest) Wipers/washers (front and rear) Intermittent front wiper

973C Track Loader specifications

21

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

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-on GP bucket MP 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 buckets Bucket teeth, set of 8 bolt-on adapters and tips (K90), includes corner adapters General duty, for GP bucket General duty, for MP bucket Extra duty, for GP bucket Extra duty, for MP bucket Penetration, for GP bucket Penetration, for MP bucket Bumper (removed)

Controls (for equipment hydraulic system) Two-lever control 3rd valve for use with lines for front and rear attachments Diverter valve for use when both front and rear lines are required Counterweights 2 arrangements Medium Heavy Drawbar hitch Guards: Cab lights Idler Lift cylinders Seal protection final drive, pivot shaft, and idler seals Product link Ripper/scarifier, three ripper shanks (bumper removed) Starting aids: Engine coolant heater, 120- or 220-volt Track shoes: 500 mm (20 in) double bar grouser, RBT 675 mm (27 in) double bar grouser, RBT

22

973C Track Loader specifications

Notes

973C Track Loader specifications

23

973C Track Loader

For more complete information on Cat products, dealer services, and industry solutions, visit us on the web at www.cat.com 2006 Caterpillar All 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.

AEHQ5678-02 (12-06) Replaces AEHQ5678-01

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