 |  | Cat C11 Engine with ACERT Technology
The core concept behind ACERT technology is advanced combustion. ACERT engine technology carefully controls the combustion process to reduce pollutant levels while maintaining performance and efficiency. |
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ACERT Technology
The Cat C11 ACERT engine uses advanced engine technology to meet worldwide emissions regulations. The electronic engine delivers improved performance, serviceability and reliability. The six-cylinder engine is turbocharged and aftercooled with a high displacement-to-horsepower ratio. The large engine displacement produces better lugging capability, lower internal stresses and longer component life. |
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C11 Block
The 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. |
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Cylinder Head and Piston Technology
The 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. |
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 | | Advanced Diesel Engine Management (ADEM) A4 Engine Controller
The 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. |
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Fuel Delivery
Multiple 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. |
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Noise Reduction Technologies
Noise 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. |
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 | | Performance and Productivity – Power Train
The Cat C11 ACERT engine, matched with the six-speed electronic controlled transmission and a powerful retarder, delivers the performance needed to get the job done. |
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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. |
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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. |
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Wastegate Turbocharging
Single wastegate turbocharger provides higher boost over a wide range, outstanding low-end performance with improved peak torque and enhanced engine response. |
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Electronic Transmission
The Caterpillar electronically controlled transmission is designed specifically for the articulated truck and its applications. It features anti-hunt shift strategy for speed continuity and six forward speeds and one reverse speed. The forward gears provide a wide operating range and allow operators to precisely match working speeds to job conditions for maximum productivity. This also permits more time in efficient direct drive and less time in torque converter drive. The automotive style in-line shifter is located in a console on the operator's right and is designed to reduce operator fatigue. |
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Electronic Clutch Pressure Control
The ECPC technology works with Controlled Throttle Shifting to manage shift torque and provide exceptional shift smoothness. The system uses Caterpillar's latest electronic control hardware. ECPC valves are field proven; they are currently used on Cat medium wheel loader and track-type tractor transmissions. The latching valve that sits beneath the ECPC valves provides stay-in-gear functionality in the event of electrical failure. The system is temperature-compensated and ensures constant shift times even when the oil is cold. It is programmable, communicates with the engine ECM and has self-diagnostic capabilities. |
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Controlled Throttle Shifting (CTS)
Transmission clutch life is a function of the number of shifts and the level of stress during each shift. CTS significantly reduces power train stress and clutch wear by controlling engine speed, torque converter lock up and transmission clutch engagements. CTS and ECPC help extend transmission life. |
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Engine Overspeed Inhibitor
Electronic Transmission Control (ETC) protects against engine overspeeding by shifting the transmission up one gear at specified rpm settings. If the transmission is in its highest gear, torque converter lockup disengages. |
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Directional Shift Management
Regulates engine speed during directional shifts to prevent damage caused by high-speed directional changes. |
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Programmable Top Gear Selection
Electronic Transmission Control lets you electronically limit top gear selection without the use of additional service tooling or mechanical limiting of the shift cane. |
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Retarder
Integral 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. |
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Retarder Power
Increased power capability gives operators greater control on short, steep grades and minimizes the need to apply the brakes, resulting in extended service brake life. It retains four modes of operation, with three stages of retardation, so operators can match the level of retarding to the grade resistance. |
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Retarder Operation
The retarder acts as an engine-transmission brake, protecting the engine from overspeeding and reducing brake wear. It is positioned on the torque converter output shaft between the transmission and the torque converter housing. An operator approaching a downhill grade engages the retarder using a handle on the steering column. Oil enters the retarder housing and flows into the vanes of the rotor. The rotor turns at engine speed and throws the oil against the stationary stator vanes on the retarder housing. As engine speed increases, the stator's resistance to the moving oil creates pressure and slows rotation of the rotor. This slows the machine, improving brake life while preventing engine overspeed. Service brakes should only be used to bring the machine to a complete halt. |
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 | | Retarding Curve
To determine retarding performance, read from Gross Weight down to % Effective Grade. Effective Grade equals actual % favorable grade minus 1% for each 10 kg/tonne (20 lb/ton) of Rolling Resistance. From this point, read horizontally to the curve with the highest attainable speed range. Then, go down to Maximum Speed. Retarding effect on these curves represents full application of the retarder. |
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Usable Rimpull
Power 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. |
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 | | Gradeability, Speed and Rimpull Graph
To determine performance, read from Gross Weight down to % Total Resistance. Total Resistance equals actual % grade plus 1% for each 10 kg/tonne (20 lb/ton) of Rolling Resistance. From this point, read horizontally to the curve with the highest attainable speed range. Then, go down to Maximum Speed. Usable rimpull depends on traction available. |
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Hydraulic Fan
The 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. |
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 | | Performance and Productivity – Suspension and Traction Control
Three-point front suspension provides a smooth ride, allowing the operator to travel at speed over rough terrain. Cross-axle differential locking system provides full driveline locking for maximum performance in adverse conditions. |
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Front Suspension
The three-point front suspension oscillates ±6° to provide a smooth ride, allowing the 725 to travel at speed over rough terrain. It also softens impact loads on structures and components for improved front frame life. |
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A-Frame Construction
The front suspension uses an oscillating A-frame with a lateral tie rod to control axle sideways movement. The independent low-pressure, oil-nitrogen suspension cylinders provide an excellent ride in rough conditions. Low pressure ensures consistent damping and increased seal life. |
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Front Suspension Cylinders
Front suspension cylinders are designed for tough applications and offer a soft, smooth ride. |
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Mounting Points
Suspension mounting points are integrated into the axle housing, increasing reliability. |
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 | | Rear Suspension
The rear suspension features a walking beam geometry that extends component life and provides a stable ride for excellent load retention. The walking beams are connected to the axles by the Caterpillar elastomer suspension mounting, specifically designed for the articulated truck. |
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Suspension Design
Center and rear axle castings mount to A-frames, which attach to the rear frame by lateral tie rods and sealed, steel spherical bearings; steel bearings increase load-carrying capacity. The rugged low-maintenance system allows oscillation and independent wheel movement. The rear suspension design optimizes stability, traction and flotation. |
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Traction Control
The 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. |
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Inter-axle Differential Lock
Locks all three axles in unison and modifies torque distribution for excellent traction in poor underfoot conditions and on grades. It is activated by depressing a switch incorporated into the footrest; this design enhances operator comfort. The inter-axle differential is located in the output transfer gear. All of the bearings, planet gears and splines are force lubricated to ensure proper lubrication. |
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Cross-axle Differential Locks
Provides 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. Both systems can be engaged and disengaged on the move. |
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Fast Hoist Cycle Times
The 725 body raises in 10 seconds and lowers in 8 seconds. It features a 71° hoist angle with power up and down for clean load ejection and fast dump cycles. Double-acting, single stage hoist cylinders and a powerful dedicated hydraulic system deliver class-leading performance. |
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 | | Load-Carrying Capacity
Large 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. |
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Exhaust Heat System
The body comes exhaust heat ready. |
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Body Design
Large body volume, low center of gravity and diverging flow design result in high material capacity, excellent stability and clean load ejection. The body is constructed from high-yield, heat-treated steel, providing exceptional strength without adding unnecessary weight. The integral front spill guard helps material retention and protects the hitch area from falling material. Optional scissors-type tailgates further improve material retention in steep or sloppy applications. |
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Steering System
Cat 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. |
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 | | Hydraulic Steering Cushioning System
The 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. |
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 | | Operator Comfort
Large center-mounted cab, oscillating front axle, air suspension seat, full-size trainer seat and large storage space provide exceptional operator comfort. |
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Ride Comfort
The 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. |
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Spacious Two-Person Cab
The 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 design. |
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Air Suspension Seat
The 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. |
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 | | Storage Space
Plenty of storage space to create a secure and uncluttered working environment. The cab features a cup holder, a handy storage "pocket" on the door and storage in the rear panel behind the operator. Storage space under the trainer seat has also been provided. |
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 | | Trainer Seat
Full-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. |
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Heating/Ventilation/Air Conditioning
Twelve vents provide air distribution to keep the operator comfortable and to provide rapid defrosting of all windows. Heating and air conditioning are standard. The recirculation filter is repositioned for easier servicing. |
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Radiator Mounting
The radiator is mounted at an angle to prevent heat transfer to the cab. |
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Dual-Sliding Window
The 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. |
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Sound Levels
Cab 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. |
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 | | Steering Column
Telescopic and tilt features provide a comfortable driving position. The steering column has two ergonomically designed control levers: retarder control on the right and intermittent wiper-washer, turn signal, dimmer control and flash-to-pass function on the left. |
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 | | Ease of Operation
Ergonomically designed wrap-around dash, tilt and telescopic steering wheel, easy-to-reach controls and outstanding all-around viewing promote fast, confident machine operation. |
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Ergonomic Layout
The 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. |
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Dash
The generation II wrap-around dash puts all controls within easy reach of the operator. Featuring LED illuminated rocker switches, large LCD display and a rear wash wipe rocker switch. It provides an automotive feel with the industrial strength you would expect from Caterpillar. |
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Viewing Area
The low sloping hood and placement of the cooling package behind the cab give the operator excellent all-around visibility, resulting in high operator confidence and fast cycle times. The design of the door panel, body panels, dash, hood and rear window guard provide excellent visibility to the ground. |
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Wipers
The 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. |
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 | | Differential Lock Controls
The 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. |
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 | | Dash-Mounted Switch
A dash-mounted switch is all that is required to select full driveline lock-up. |
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| | Transmission and Hoist Levers
The hoist lever provides easy, comfortable operation. The transmission lever offers excellent comfort, along with the control for top gear limit, transmission hold and neutral lock. |
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 | | Safe Start Mode (Neutral Start)
The transmission lever must be in neutral and the hoist lever must be in hold before the engine will start. |
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Body-Up Protection
Prevents transmission upshift from first gear if the hoist lever is not in the float position. |
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Retardation Control
The retarder control lever is positioned on the right-hand side of the steer column. Four modes of operation, with three steps of retardation, provide an optimum match between operating conditions and retarding power. |
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Suspended Pedals
Easy 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. |
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 | | Cat 2S Machine Monitoring System
The Caterpillar 2S machine monitoring system provides 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: |
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Level 1 - Be aware
The action lamp is OFF. The action alarm is OFF. The relevant warning lamp will be illuminated. |
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Level 2 - Change machine operation or perform maintenance
The action lamp flashes ON and OFF. The action alarm is OFF. The relevant warning lamp will be illuminated. |
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Level 2S - Immediate change in operation required
The action lamp flashes ON and OFF. The action alarm is steady ON. The relevant warning lamp will be illuminated. |
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Level 3 - Safe machine shutdown required
The action lamp flashes ON and OFF. The action alarm is pulsed ON. The relevant warning lamp will be illuminated. |
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 | | Durability and Reliability
The 725 has built-in durability and reliability. Cat purpose-built, articulated truck drivetrain components, front frame and hitch ensure maximum performance in the toughest applications. |
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Front Frame
The 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. |
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Rear Frame
Twin-box construction minimizes stress concentration and provides low weight with long service life. |
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Castings
The front and rear frames make extensive use of heavy-duty steel castings. |
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Front Suspension
Three-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. |
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 | | Articulating/Oscillating Hitch
The articulating hitch provides the truck with steering articulation and the oscillation ensures the truck maintains all-wheel ground contact in rough terrain. |
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 | | Steer Cylinders In-Line with Hitch
Steer cylinders are in-line with the hitch, minimizing steer loads and stress in the hitch area. The hitch design provides a smooth ride, enhanced visibility, better trailer stability and a simplified drivetrain. |
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Hitch Construction
Two-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. The two-piece design also makes for easier remanufacturing. |
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Service Brakes
The 725 features a dual-circuit, all wheel system. Full-power hydraulic system actuates self-cleaning caliper disc brakes with independent front and rear circuits and accumulators. |
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 | | Parking Brake
The parking brake is located on the center axle in an elevated position out of the dirt and is designed to deliver higher heat capacity and abuse resistance. It is operated by a push-button, spring applied and hydraulically released. |
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Cat Power Train Components
The 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. |
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 | | Radiator Protection
The radiator is located behind the cab, protecting it from frontal impacts. This design incorporates three levels of protection: |
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1) Body Spill Guard
The body spill guard helps hold material in the body and protects the hitch area from falling material. |
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2) Cab Steel Spill Guard
The cab steel spill guard is attached to the back of the cab and extends over the radiator and window. |
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3) High-Strength Surround
The high-strength surround is made of durable composite G.R.P. and protects the radiator on all sides. |
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 | | Serviceability
Long service intervals and easy maintenance provide better machine availability, resulting in lower owning and operating costs. |
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Long Service Intervals
Engine oil change interval at 500 hours and hydraulic oil change interval at 4,000 hours. Wheel-bearing adjustment is completely eliminated. Long service intervals lower maintenance costs and reduce downtime. |
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Lube Points
Lube 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. |
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Service Points
Engine 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. |
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Radiator
The 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. |
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Extended Life Coolant
Extended Life Coolant allows 6,000-hour change interval and improves water pump life by reducing aluminum corrosion. It is environmentally friendly with no silicates, phosphates, borates or molybdates. |
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 | | Hood
The hood is raised and lowered electrically, requiring minimal operator effort when servicing the machine. |
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 | | Electrical Service Center
The electrical service center, located inside the cab, simplifies servicing of the electrical system. The service center includes a 12-volt power port, product link service connector and the Cat Data Link connector. All fuses, relays and power ports are conveniently located. The instrument panel LED's and indicator modules provide easy access and quick servicing, reducing machine downtime. |
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 | | Cat Data Link Connector
The Cat Data Link connector provides a connection point for a laptop computer running Electronic Technician (ET) software. The Cat Data Link port performs programming functions on all electronic controls. |
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Service Access
The 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. |
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Integrated Transmission Package
The transmission integrates several components into a single package. The transmission package includes the transmission pump, torque converter, retarder and four pump drives. Because the transmission is an integral design, it eliminates many of the external hoses, resulting in less servicing and higher reliability. |
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Engine and Transmission Removal
The front frame design allows the engine and transmission to be removed and installed in one piece. |
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Truck Transport
The suspension system eliminates the need to lower the suspension when transporting the truck, reducing maintenance and downtime. |
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 | | Output Transfer Gear
Provides lubrication of all bearings and clutches using a distributed pressure-lubricated system. Good lubrication translates into less service and repair. |
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 | | Complete Customer Support
Your Cat dealer offers a wide range of services that can be set up under a customer support agreement when you purchase your equipment. The dealer will help you choose a plan that can cover everything from machine configuration to eventual replacement. |
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 | | Purchase
Look 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. |
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Selection
Make 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 you with these questions. |
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Custom Products
The 725 is compatible with a wide range of Caterpillar and auxiliary equipment manufacturers' specialized products. For more information, contact your local Cat dealer. |
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 | | Loading Tool Match
An 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. |
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Operation
For the best operating techniques to increase productivity and your profit, turn to your Cat dealer for the latest training literature and trained staff. |
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 | | Maintenance
Repair option programs guarantee the cost of repairs up front. Diagnostic programs such as Scheduled Oil Sampling and Technical Analysis help you avoid unscheduled repairs. |
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Replacement
Repair or rebuild? Caterpillar 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. |
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 | | Product Support
The 725 offers easy maintenance with combined service points and extended service intervals to keep the machine running longer. Your local Cat dealership will be with you every step of the way with its unsurpassed worldwide parts support, trained technicians and customer support agreements. |
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Warranty
Your local Cat dealer is there to support and protect you. Extended warranty options are also available. |
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CAT.com
For more complete information on Cat products, dealer services and industry solutions, visit us on the Web at www.CAT.com. |
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