Cat C11 Engine
A combination of proven systems and innovative new technologies, ACERT engines optimize performance while meeting EPA Tier 3 and EU Stage 3a engine exhaust emission regulations.
ACERT TechnologyThe C11 ACERT engine introduces a series of evolutionary, incremental improvements that provide breakthrough engine technology built on systems and components developed by Caterpillar with proven reliability. The technology capitalizes on Caterpillar expertise in four core engine systems: fuel, air, electronics and after treatment. ACERT technology is a unique and revolutionary systems solution that enables Cat engines to meet today?s clean air regulations, thus establishing the building blocks for attaining tomorrow?s more stringent standards.
C11 BlockThe one-piece, gray iron block features generous ribbing for stiffness and heavy bearing bulkheads for rigidity and strength as the crankshaft turns. Straight O-ring connection points reduce the loss of engine oil and fluids.
Cylinder Head and Piston TechnologyThe C11 has a cross-flow cylinder head with refined port geometry, which improves breathing and provides better combustion. The Monotherm/steel pistons have a forged steel design, which offers high strength, light weight and tighter tolerances. The result is better oil control, minimal blow-by and long liner life.
Advanced Diesel Engine Management (ADEM) A4 Engine ControllerThe ADEM A4 electronic control module manages fuel delivery to get the best performance per liter or gallon of fuel used. The engine management system provides flexible fuel mapping, allowing the engine to respond quickly to varying application needs. It tracks engine and machine conditions while keeping the engine operating at peak efficiency.
Fuel DeliveryMultiple injection fuel delivery involves a high degree of precision. Precisely shaping the combustion cycle lowers combustion chamber temperatures, generating fewer emissions and optimizing fuel combustion. This translates into more work output for your fuel cost.
Noise Reduction TechnologiesNoise reduction has been achieved through design changes to the isolated top cover, oil pan, multiple injection strategy, insulated timing case cover, sculpted crankcase and gear train refinements.
Performance and Productivity - Power Train
Integrated power train with more power, greater performance and lower fuel consumption - the power to do more work.
Mechanically Actuated Electronic Unit Injection (MEUI)A highly evolved fuel system with a proven record of reliability in the field. It combines the technical advancement of an electronic control system with the simplicity of direct mechanically controlled unit fuel injection. It excels in its ability to control injection pressure over the entire engine operating speed range. These features allow the Cat C11 to have complete control over injection timing, duration and pressure.
Air-to-Air Aftercooling (ATAAC)ATAAC keeps air intake temperatures down and, in concert with the tight tolerance combustion chamber components, maximizes fuel efficiency and minimizes emissions. Significant improvements in airflow are generated by a turbocharger, unique cross-flow head and a single overhead camshaft
Wastegate TurbochargingSingle wastegate turbocharger provides higher boost over a wide range, outstanding low-end performance with improved peak torque and enhanced engine response.
Electronic TransmissionThe Caterpillar six-speed electronically controlled transmission is designed specifically for the articulated truck and its applications. It features anti-hunt shift strategy for speed continuity.
Controlled Throttle Shifting (CTS)Significantly reduces power train stress and clutch wear by controlling engine speed, torque converter lock up and transmission clutch engagements.
RetarderIntegral retarder with a high power density design. Due to its compact size, the unit quickly fills with oil, providing more retarding power and fast response times.
Usable RimpullPower train components work together to offer more usable rimpull at higher speeds on effective grades. In first gear, the torque converter overcomes grade resistance by sending more torque to the wheels and preventing engine lugging. On downhill grades, the retarder acts like a brake by slowing the machine.
Hydraulic FanThe remote-mounted hydraulic fan is temperature sensitive providing variable speeds when needed, which minimizes power requirements. The result is more power to the ground and faster cycle times.
Performance and Productivity - Suspension and Traction Control
Suspension systems and traction control - delivering power to the ground in all conditions.
Front SuspensionThe three-point front suspension oscillates ±6° to provide a smooth ride, allowing the 725 to travel at speed over rough terrain and softening impact loads on structures and components.
Rear SuspensionFeatures a walking beam geometry with Caterpillar designed rear suspension mounts which provide a reliable and stable ride for excellent load retention.
Traction ControlThe traction control system is comprised of a wet clutched inter-axle differential and wet clutched cross-axle differentials. All differentials can be engaged and disengaged on-the-go for maximum versatility. When used together, the differentials provide 100 percent driveline locking.
Inter-axle Differential LockLocks all three axles in unison and modifies torque distribution for excellent traction in poor underfoot conditions and on grades. It is operated by a switch located in the footrest.
Cross-axle Differential LocksProvides full driveline locking - all three axles and all six wheels for maximum performance in the most adverse conditions. Acts in unison with the inter-axle differential lock when the footswitch is actuated and the dash-mounted switch is selected.
Fast Hoist Cycle TimesFast body raise and lower times mean less time spent in the dump area.
Load-Carrying CapacityLarge target area provides high-load carrying capacity. Its diverging flow design gives clean load ejection, which maximizes production and avoids waste of material carry-back.
Exhaust Heat SystemThe body comes exhaust heat ready.
Steering SystemCat articulated trucks use a load-sensing steering system for smooth, precise control. It features a single, variable displacement pump. Two double-acting, cushioned steer cylinders allow the machine to articulate 45° to the left or right, permitting precise positioning in tight areas. Its compact Hand Metering Unit controls the cylinders for responsive steering and performance. An electronic secondary steering system is standard.
Hydraulic Steering Cushioning SystemThe 725 incorporates a hydraulic cushioning system, resulting in smoother and more responsive steering. It also increases operator comfort and reduces shock loads to the machine components.
The operator's office - high productivity from a comfortable, motivated operator.
Ride ComfortThe three-point front suspension with its oscillating axle and low-pressure ride struts, combined with the center-mounted cab, offers unrivaled levels of ride comfort for the operator in all driving conditions. The operator remains comfortable and productive throughout the day.
Spacious Two-Person CabThe 725 features a large two-person cab, offering a comfortable working space for both the operator and trainer or trainee. All 700 Family articulated trucks use the same spacious cab design.
Air Suspension SeatThe air suspension seat enhances operator comfort with a cushioned upper high back, adjustable damping with three settings, ride zone indicator and adjustable lumbar settings. It is fully adjustable to provide the optimal driving position.
Storage SpacePlenty of storage space to create a secure and uncluttered working environment.
Trainer SeatFull-size trainer seat features a fully padded seat with a backrest and a wide, retractable seatbelt for a secure and comfortable ride. The trainer seat is positioned next to the operator seat, giving both the operator and trainer a clear view of the instrument panel, controls and the road.
Heating/Ventilation/Air ConditioningTwelve vents provide air distribution to keep the operator comfortable and to provide rapid defrosting of all windows. Heating and air conditioning are standard and the recirculation filter is positioned for easy servicing.
Dual-Sliding WindowThe right-hand window is a dual sliding window. Opening this window with the left rear-hinged window provides cross-flow ventilation and enhanced operator comfort.
Sound LevelsCab mounts are designed to reduce noise and vibration in the cab. All connections to the cab are resiliently mounted. The operator's station makes extensive use of sound absorbing and barrier materials to keep sound levels low.
Steering ColumnA comfortable driving position is provided by a telescopic and tilt steering column.
Ease of Operation
Designed for simple, easy operation, the 725 allows the operator to focus on production.
Ergonomic LayoutThe controls and layout of the cab are designed to make it as easy to operate as your car. Quick and easy to read and simple to operate, the controls on the 725 allow the operator to concentrate on production.
Viewing AreaThe low sloping hood and placement of the cooling package behind the cab give the operator excellent all-around visibility. The large glass area and central operator position also provide excellent visibility.
WipersThe wet arm wiper system cleans more glass area and is bottom-mounted to keep it out of the operator's line of sight. Windows are tinted to reduce glare.
Differential Lock ControlsThe inter-axle differential lock is engaged/disengaged by using a raised switch incorporated into the drivers foot rest, for ease of operation. For 100% lock up, all three cross-axle differential locks act in unison with the inter-axle differential lock when the foot switch is activated and a dash mounted switch is selected. Disengaging the foot switch opens all differential locks immediately.
Suspended PedalsEasy to operate and reach with plenty of leg and foot room. Suspended pedals also make it easier to clean the cab floor by keeping the pedals out of the dirt.
Cat 2S Machine Monitoring SystemProvides an improved method of monitoring critical machine functions and alerts the operator to an immediate or impending problem. The system provides four levels of warning:
Durability and Reliability
High availability leads to high productivity.
Front FrameThe front frame design features a large box-section, and wide, stiff frame beams to handle torque loads. The divergent frame design decreases stress in the hitch area and optimizes suspension geometry. The frame has been designed to make maximum use of robotic welding for increased durability.
Rear FrameTwin-box construction minimizes stress concentration and provides low weight with long service life.
CastingsThe front and rear frames make extensive use of heavy-duty steel castings.
Front SuspensionThree-point oscillating axle front suspension provides unparalleled ride quality. It also protects the truck from the most adverse road conditions by absorbing shock loads that would otherwise reach the frame.
Articulating/Oscillating HitchThe articulating hitch provides the truck with steering articulation and the oscillation ensures the truck maintains all-wheel ground contact in rough terrain.
Hitch ConstructionTwo-piece hitch construction features a strong, durable cast steel head bolted to a hard wearing forged steel tube. The hitch tube has large, hardened bearing areas and a hardened thrust face for reduced maintenance and longer life.
Service BrakesFeatures a dual-circuit, all wheel braking system. Full-power hydraulic system actuates self-cleaning caliper disc brakes with independent front and rear circuits and accumulators.
Parking BrakeLocated on the center axle in an elevated position out of the dirt and designed to deliver higher heat capacity and abuse resistance.
Cat Power Train ComponentsThe 725 features purpose-designed earthmoving components from the engine through to the final drives. Proven in articulated trucks and other Cat equipment, these rugged building blocks ensure long life and reliability.
Radiator ProtectionThe radiator is located behind the cab, protecting it from frontal impacts. This design incorporates three levels of protection:
More time on production, less time and money spent on servicing.
Long Service IntervalsLong engine oil change and hydraulic oil change intervals lower maintenance costs and downtime. Wheel-bearing adjustment is completely eliminated.
Lube PointsLube points are grouped at the rear of the front frame and the front of the rear frame. Universal joints are lubed for life, eliminating servicing. Autolube is optional.
Service PointsEngine and transmission dipstick and fill caps, air and fuel filters, and the fuel priming pump are all mounted on the left side of the engine under the hood. Coolant level indicator and fill caps are outside the cab.
RadiatorThe radiator package is located behind the cab, which provides protection from frontal impacts and offers access to both inlet and outlet sides of the radiator.
Extended Life CoolantExtends the change interval and improves water pump life by reducing aluminum corrosion.
HoodThe hood is raised and lowered electrically requiring minimal operator effort when servicing.
Electrical Service CenterLocated inside the cab, this service center provides a power port, diagnostic connector and the Cat Data Link connector.
Cat Data Link ConnectorProvides a connection point for a laptop computer running Electronic Technician (ET) software. The Cat Data Link port performs programming functions on all electronic controls.
Service AccessThe cab tilts to the side to provide easy access underneath, which simplifies servicing of the transmission, drive shafts and hydraulic pumps. Machine electrical and hydraulic interfaces are located on the right side of the cab, behind a removable cab body panel for easy access.
Truck TransportThe suspension system eliminates the need to lower the suspension when transporting the truck, reducing maintenance and downtime.
Output Transfer GearProvides lubrication of all bearings and clutches using a distributed pressure-lubricated system. Good lubrication translates into less service and repair.
Complete Customer Support
Cat dealer services help you operate longer with lower costs.
PurchaseLook past initial price, look at the value the 725 offers. Consider the resale value, compare productivity and day-to-day operating costs and fuel consumption. Consult your local Cat dealer for financing options.
SelectionMake detailed comparisons of the machines you are considering before you buy. What are the job requirements, machine attachments and operating hours? What is your need for machine availability and do you need or have the proper loading tool match? Your Cat dealer can help.
Loading Tool MatchAn optimum system match gives you a major productivity advantage. The 725 is an excellent match for the Cat 345C, 330D and 325D Hydraulic Excavators; and Cat 972H, 966H, 962H and 950G II Wheel Loaders. This results in increased production and lower system costs per unit of volume moved.
OperationFor the best operating techniques to increase productivity and your profit, turn to your Cat dealer for the latest training literature and trained staff.
MaintenanceRepair option programs guarantee the cost of repairs up front. Diagnostic programs such as S•O•SSM and Technical Analysis help you avoid unscheduled repairs.
ReplacementRepair or rebuild? Cat articulated trucks are designed for a longer life with rebuildable components. Your Cat dealer can help you evaluate the cost involved so you can make the right choice.
Product SupportThe 725 offers easy maintenance with combined service points and extended service intervals to keep the machine running longer. Your local Cat dealership offers unsurpassed worldwide parts support, trained technicians and customer support agreements.
WarrantyYour local Cat dealer is there to support and protect you. Extended warranty options are also available.
CAT.comFor more complete information on Cat products, dealer services and industry solutions, visit us on the Web at www.CAT.com.