C7 Engine with ACERT® Technology
ACERT® Technology incorporates a series of innovations working at the point of combustion to optimize engine performance while meeting U. S. EPA Tier 3 and E. U. Stage IIIa engine emission regulations.
Cat® C7 Engine with ACERT® TechnologyThe C7 engine provides a full-rated gross power (SAE J1995) of 167 kW (224 hp) at 2200 rpm with a torque of 872 N-m (643 ft/lb). The combination of large displacement and high torque allow the BG-2455D to perform under the toughest conditions.
HEUI Fuel InjectionThe HEUI™ fuel system is unique and combines the technical advancement of an electronic control system with the simplicity of HEUI fuel injection. The HEUI fuel system excels in its ability to control injection pressure over the entire engine operating speed range. These features allow the C7 engine to have complete control over injection timing, duration and pressure.
Multiple Injection Fuel DeliveryMultiple injection fuel delivery involves a high degree of precision. Precisely shaping the combustion cycle lowers combustion chamber temperatures, which generates fewer emissions, optimizes fuel combustion and translates into more work output for your fuel cost.
High Cylinder PressuresHigh cylinder pressures combined with tightly controlled tolerances promote extremely efficient fuel burn, less blow-by and lower emissions.
C7 Cylinder BlockThe C7 engine’s cylinder block offers increased tensile strength. It features improved sealing with gaskets to ensure fewer leaks. This new design supports the engine’s higher compression ratios and increases its power density. The incorporation of straight-thread “O” ring connection points reduce the loss of engine oil and fluids.
Sound Reduction FeaturesThe C7 engine sound reduction features include composite valve covers with a fully isolated base, a steel oil pan and a cast iron front cover. The HEUI™ fuel systems rate-shaping technology also provides control of sound and vibration levels.
Service, Maintenance and Repair Easier service, maintenance and repairEasier service, maintenance and repair is accomplished by monitoring key functions and logging critical indicators. Advanced electronic diagnostic capabilities are possible using CAT® Electronic Technician.
Turbocharged and Air-To-Air Aftercooling (ATAAC)The turbocharged air-to-air aftercooling system provides high horsepower with increased response time while keeping exhaust temperatures low for long hours of continuous operation. Air-to-air aftercooling keeps air intake temperatures down, maximizing fuel efficiency and minimizing emissions.
ADEM™ A4 Electronic Control ModuleThe ADEM A4 electronic control module manages fuel delivery, valve timing and airflow to get the most performance per liter (gallon) of fuel used. The control module provides flexible fuel mapping, allowing the engine to respond quickly to varying application needs. The control module also monitors engine and machine conditions while keeping the engine at peak efficiency.
High Capacity Cooling System
The standard, high-capacity cooling system provides efficient operation in high ambient temperatures. The new system design also rovides quiet operation that benefits the operator and the surrounding environment.
AirflowThe airflow design draws ambient air across the engine compartment and through the radiator. This new design allows the exhaust air to exit the right side of the machine in order to provide a cooler engine compartment and operator platform.
High Capacity Cooling PackageThe high capacity cooling system allows the fan to run slower, reducing power demand while extending component life.
Variable Speed FanThe variable speed fan is electronically controlled and hydraulically driven to provide on-demand cooling. This on-demand operation reduces engine power demand and provides quiet operation.
Dual Operator Stations
The dual operator stations provide complete control and good visibility from either side of the operating platform.
Dual Operator StationsThe dual operator stations incorporate fully equipped consoles with meter per minute (feet per minute) gauges, adjustable suspension seats, armrests and retractable seat belts.
Operator VisibilityThe dual operator stations can be positioned in one of four different locations to provide optimum visibility. The stations can extend beyond the machine frame for good visibility when joint matching or while paving other applications where precise control is required.
Center Control ConsoleThe center control console includes analog gauges, switches and a digital display for machine functions. The center console also houses a majority of the electrical components for fast, easy service.
The Mobil-trac undercarriage provides superior durability while delivering unmatched mobility and traction.
Mobil-trac™ UndercarriageThe Mobil-trac undercarriage combines the flotation and traction benefits of a crawler suspension with the mobility and ride quality of a wheel-type paver.
Durable Mobil-trac™ BeltThe Mobil-trac system includes a durable, high strength rubber track belt with a thick outer cover and five internal layers of flexible steel cable.
Large Ground Contact AreaThe Mobil-trac’s ground contact area is 3020 mm (119") long and 457 mm (18") wide. This large footprint provides even weight distribution over the entire length of the belt.
Two Speed Planetary DriveA fixed displacement motor drives a two-speed planetary providing quick mobility around the job site.
Friction DriveA hydraulic tensioning cylinder with an accumulator maintains friction between the Mobil-trac belt and the drive wheel in order to provide drive traction. Manual adjustment of track tension is not required.
Rubber Coated Steel Mid-WheelsThe fully bogied undercarriage provides low maintenance and long life.
Steel Track Undercarriage
The steel track undercarriage provides even weight distribution, good tractive effort and dependable performance.
Quad Rear BogeyA special quad bogey is positioned near the rear of the steel track in order to evenly distribute the load. The steel track system includes hydraulic cylinders to provide automatic tensioning.
Track RailsThe steel track system incorporates D3 dozer track rails. The sealed and lubricated links include a split master link for dependable performance.
Bonded Track PadsThe track pads contain a special rubber compound in order to provide long life and good traction. The pads are attached with two bolts for easy replacement.
Single Speed Planetary DriveA variable displacement motor drives a single-speed planetary in order to provide infinitely variable speed selection.
Hydrostatic Drive System
Efficient hydrostatic drive system eliminates chains and other mechanical linkages between the engine and final drive components.
Closed-Loop Hydrostatic Propel SystemThe propel system incorporates pave, travel and maneuver modes for maximum versatility.
Propulsion ControlThe machine controller provides accurate control of steering and propulsion systems and ensures straight-line tracking.
Speed ControlA speed control dial located on each operator station allows the operator to set a maximum travel speed. When the propel lever is positioned in the full-forward position the paver will travel at the pre-set speed. Each station includes a meters per minute (feet per minute) gauge.
Exclusive Material Delivery System
Productivity and quality enhancements are built-in features.
Material Delivery SystemThe BG-2455D provides precise mix delivery with minimal operator monitoring through the most advanced material handling system. Left and right feeders in addition to the left and right augers are controlled independently. The ability to control these four components separately, through a machine controller, eliminates the need for feeder gates. In order to control mix delivery, the operator sets a speed rate for each feeder that will maintain the desired mix level in the left and right auger chambers. Once the feeder speeds are set, the ratio of feeder speed to the maximum auger speed is automatically maintained by the machine controller, even though the propel rate may change as the job progresses. This ratio control capability is particularly helpful when paving wider on one side of the machine than on the other. Each feeder can be set at a specified speed to deliver the proper amount of mix that is needed.
Outboard Feeder Drives
Increased live tunnel area provides easy servicing.
Outboard Feeder DrivesThe feeders have outboard mounted motors, reducers and feeder drive chains to maximize the live feeder tunnel area and reduce center line segregation. This design also provides greater ease of servicing the feeder drive system.
Gateless Feeder System
Variable speed feeders precisely control mix delivery while reducing wear and segregation.
Gateless FeedersThe gateless feeders on the BG-2455D always run full of mix regardless of the speed required to fill the auger chamber. This is typically a slower speed than would be experienced with a paver utilizing feeder gates to control mix delivery rates. By not always having to run at full speed, feeder component wear is significantly reduced. When changes in feeder speed are required, delivery of mix to the augers is immediate. This is in contrast to pavers with gates, where any delivery rate change is delayed for the length of time it takes to clear the tunnel of mix from the previous gate setting. Running at slower speeds can also help reduce the opportunity for segregation, especially when working with larger stone mixes that have more of a tendency to segregate.
Feeder DesignThe tunnel construction on the BG-2455D improves mix flow. The auger drive assembly is independent of the tractor which allows the distance between the two feeders to be significantly reduced. Keeping the feeders close together allows the flow from both feeders to blend together more easily as they discharge into the auger cavity. The tunnel and auger designs eliminate voids under the chain case to minimize segregation.
Auger AssemblyThe auger provides mat consistency while minimizing segregation and also the assembly height can be hydraulically adjusted 192 mm (7.6"). The ability to raise the auger assembly simplifies loading and unloading from a transport vehicle. Also, when working with larger stone mixes, segregation can often be eliminated or minimized by raising the augers to allow mix to flow unrestricted under the auger assembly.
The high capacity, integrated generator ensures peak performance and high reliability.
Industrial, Single-Phase GeneratorThe 24 kW generator is hydraulically driven through a load-sensing, pressure-compensating pump providing quiet operation.
Single Control SwitchA single switch on the tractor’s operating console activates the generator. The generator operates at 1800 rpm and includes GFCI protection.
Full PowerFull power is provided to the electric screed and auxiliary power panel while the engine is operating at low idle speed. A control manifold and internal voltage regulator maintains constant frequency and voltage at both high and low idle.
Auxiliary Power Panel (Optional)
The auxiliary power panel provides efficient power for night-time lighting and other job site power needs.
Optional Auxiliary Power PanelThe power panel provides 8 kW of power and includes four 120-volt receptacles protected by ground fault circuit interruption (GFCI) and two 240-volt receptacles.
Power NeedsThe auxiliary power panel can be used to supply power for night-time lighting and job site work tools.
Auxiliary Power Panel DoorThe panel door can remain closed while power cords are attached to the receptacles providing effective protection.
Simplified service means more paving and less maintenance time.
Electronic Monitoring System (EMS-III)EMS-III simplifies calibration of hydraulic and electrical systems and is compatible with CAT® Electronic Technician (CAT ET).
Large Access Doors and PanelsPreventative maintenance points can be accessed through the large swing open access doors and panels.
Remote Lubrication PointsGrease fittings are grouped to provide quick, routine service of bearings.
Quick-Connect Sampling PortsThe quick-connect ports simplify retrieval of critical fluids for diagnosis.
Color-Coded and Numbered Electrical SystemTroubleshooting is efficient and simplified with the color-coded and numbered electrical system.