A Cat C15 ACERT engine features an electronically controlled fuel delivery system, an engine idle shutdown system to conserve fuel by limiting idling time, and a delayed shutdown feature to ensure that the engine is not stopped until operating temperatures have stabilized. Drive train efficiency, fuel economy and travel speeds are further enhanced with the lock-up clutch in the Cat torque converter, a feature that reduces both drive train power losses and system heat.
The Cat 824K Wheel Dozer builds on the solid performance of predecessor models with engineering refinements in its power train, operator station and structures, and features that enhance safety, serviceability and machine management. With a net power rating of 405 hp (302 kW) and a maximum operating weight of 74,966 lb (34 004 kg), the 824K is available with six blade configurations ranging in capacity from 6.6 to 21.1 yd3 (5.0 to 16.2 m3) to customize it for production dozing, stockpile dozing or clean-up work.
For further drive train efficiency, the smooth-shifting, electronically controlled, 4F/4R Cat power shift transmission can be set by the operator to automatically upshift or downshift based on machine speed. In addition, the single clutch speed shifting controls allow the 824K to carry momentum through range shifts for high productivity and fuel savings.
Both operating efficiency and operator convenience get a boost with the left foot pedal, which serves as an engine decelerator, transmission neutralizer and brake, depending on the degree of application. As a decelerator, the left pedal allows the operator to temporarily reduce engine speed by overriding the throttle lock setting when maneuvering around obstacles. Additionally, a new fuel tank provides a minimum 12 hours of operation, depending on the application.
The STIC (Steering and Transmission Integrated Control) system allows single-lever steering and transmission control. Simple side-to-side movements of the STIC lever provide up to 43° of steering articulation in both directions for precise maneuverability, and buttons on the lever provide fingertip control of directional and range shifting.
A primary focus for the 824K design is operator convenience and safety, such as providing lighted, shallow-angle stairways for entering and exiting the cab, and designing the STIC armrest to fold away for added room when entering or leaving the seat. Also, the Cat Comfort Series air-suspension seat features extra-thick cushions and moves both the attached electro-hydraulic STIC control pod and electro-hydraulic implement control pod when adjusted.
The cab, isolation-mounted to the frame, is pressurized with filtered air, and the selected temperature is maintained automatically. The control panel uses large, backlit switches with LED indicators, and a simple two-position rocker switch controls the parking brake. An optional rearview camera with in-cab monitor increases operator awareness.
To promote the safety of personnel servicing the 824K, routine maintenance points are grouped and accessible from ground level or from non-skid walkways that are protected with handrails. Swing-out doors on both sides of the engine compartment provide easy access to daily service checks, and ecology drains simplify service and help prevent spills. In addition, a ground-level power service center has electrical disconnect, emergency engine shutdown and stairway light switches.
