Cat says its new 824K wheel dozer “builds on the solid performance of predecessor models with engineering refinements in its power train, operator station and structures, and in features that enhance safety, serviceability and machine management.” With a net power rating of 302 kW and a maximum operating weight of 34,004 kg the 824K is available with six blade configurations ranging in capacity from 5 to 16.2 m3 to customise it for production dozing, stockpile dozing or cleanup work. The 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 stabilised.
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. Two engine options are available that meet either US EPA Tier 4 Final/EU Stage IV emission standards or US EPA Tier 3/EU Stage IIIA equivalent emission standards. 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 neutraliser 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 manoeuvering around obstacles. Additionally, a new fuel tank provides minimum 12 hours operation, depending on the application. An optional TPMS provides real time information to the operator in the cab, ensuring proper inflation and optimising tyre life. 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 degrees of steering articulation in both directions for precise manoeuverability, 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 centre has electrical disconnect, emergency engine shutdown and stairway light switches. To further complement serviceability, the Cat Vital Information System, VIMS 3G, integrated into the 824K design keeps operators informed about machine operating conditions via a graphic display that features a touch-screen interface. To expand machine monitoring capability, the Cat Product Link system provides event and diagnostic codes, as well as data such as operating hours, fuel level and idle time. This information is transmitted to a secure web-based application, VisionLink, which can convey information to machine owners and dealers, including working time versus idle time and mapping functions.
The 824K design also integrates massive, purpose-built structures and heavy-duty components that can support multiple rebuilds. The new dozer features a full box-section rear frame designed to resist twisting forces and shock loads encountered in heavy dozing. Steering cylinder mounts are designed to effectively dissipate steering loads into the frame, and axle mounts are heavy-duty components that contribute to the overall structural integrity. This robust design results in significant cost savings and sustained optimum performance over the life cycle of the 824K.
