The Cat C15 engine is an increased displacement version of the proven Cat 3406 engine. The C15 is U.S. EPA Tier 3/EU Stage III compliant and features a 3.5 percent horsepower increase over the previous 3406. The four stroke engine delivers fuel economy, durability and reliability in the most demanding conditions. High torque rise delivers performance you can feel with greater rimpull, lift force and faster cycle times. Resilient engine mounts dampen vibration for lower sound levels.
Engine lubricating oil is filtered, cooled and supplied by a gear-type pump.
Mechanical Electronic Unit Injector (MEUI™)
MEUI is a high-pressure, direct injection fuel system that is virtually adjustment-free. It electronically monitors operator and sensor inputs to optimize engine performance.
Air-to-Air Aftercooler (ATAAC) System
The ATAAC system provides a separate cooling for the intake manifold air. It routes hot, compressed air from the turbo and cools it with a single pass, air-to-air aluminum heat exchanger. The cooled, compressed air greatly reduces the emissions produced, meeting U.S. EPA Tier 3/EU Stage III requirements.
Airflow matched turbocharger with power rating helps reduce emissions.
19 percent more bearing area allows the engine to operate at the maximum cylinder pressure.
Higher cylinder pressure capability helps reduce fuel consumption and improves high altitude operation and provides reduced emissions.
Cylinder heat exhaust port sleeves reduce heat rejection which results in less heat transfer into the water jacket system and provides high torque rise.
Next Generation Modular Radiator (NGMR)
The parallel flow system with six cores standard (seven on the high ambient machine) improves cooling capabilities. Serviceability is also enhanced as there is no top tank to remove. The NGMR uses copper brazed brass tubes and copper fins.
ADEM™ IV (Advanced Diesel Engine Management) System
ADEM IV uses a 32-bit computer with sensors throughout the engine to regulate fuel delivery, valve timing and all other engine systems that require input to manage load and performance. ADEM IV also offers automatic altitude compensation, a cold mode start-up strategy, oil pressure and coolant warnings which result in precise engine speed control, superior cold start capability, low smoke and emissions in all operating conditions.
The extreme duty, planetary, powershift Cat transmission features heavy-duty components to handle the toughest jobs. The four planet drives operate in all gears forward and reverse. Electronic controls provide features to enhance productivity, durability and serviceability. The additions of the Electronic Clutch Pressure Control (ECPC) contributes to improved shift quality, reduced torque spikes and overall transmission durability. Control Throttle Shift (CTS) offers smoother shifts and improves clutch and power train life.
The torque converter uses a high-capacity impeller to handle the engine's increased torque rise (24 percent) and power.
The fixed front and oscillating (±13 degrees) rear heavy-duty axles feature strong gears and bearings in both the differentials and heavy-duty final drives for increased durability. Permanently lubricated, maintenance-free U-joints result in fewer parts and improved serviceability. Free floating axles shafts can be removed independently from the wheels and planetary drives.
Spindles and Final Drives
Planetary units can be removed independently from the wheels and brakes. The final drives feature planetary reduction at each wheel, and with torque developed at the wheel, less stress is placed on the axle shafts.
Conventional front and optional No-SPIN rear differentials deliver maximum traction in low traction or inconsistent ground conditions.
Completely enclosed and located on the two front wheels, the service brakes are self-adjusting with modulated engagement and are designed for easy servicing. With two brake pedals, the right pedal controls standard braking while engine deceleration and braking occurs with the left pedal.
The spring-applied, oil-released, dry drum design parking brake is mounted on the transmission output shaft driveline for manual operation. The Caterpillar Monitoring System alerts the operator if the transmission is engaged while the parking brake is applied.
The secondary brake can be applied manually by the operator. In addition, the Caterpillar Monitoring System alerts the operator if pressure drops and will automatically apply the parking brake.
This feature is improved by not only ADEM IV but also a new larger starter and four higher CCA batteries (1000 CCA).
Well-balanced hydraulics deliver precise, low-effort control and trouble-free operation.
The hydraulic system provides low-effort blade control. Seat mounted levers send electrical signals to a pilot valve mounted on the front frame, moving the sound, heat and effort caused by the hydraulic valve out of the operator's station.
Command Control Steering
A mechanical feedback system combines with valve ratio to provide quarter-turn, side-to-side steering. Unlike systems that rely on steering wheel velocity to activate steering cylinders, Command Control steering directly links the steering wheel position to articulation. The speed the machine turns is proportional to the steering wheel position. The benefit is precise control, quicker response and dramatically reduced operator motion and effort.
Hydraulic Power Steering
Center-point frame articulation permits the front and rear wheels to track with hydraulic power steering. The hydraulic system has full-flow filtering. The steering wheel operated pilot valve controls flow to the steering cylinders. The steering angle is ±42 degrees.
Load Sensing Steering
With load sensing steering, machine performance is maximized because power is directed to the steering system only when the operator steers the machine. This allows more power to be applied to the ground when the machine is not being steered. It also helps decrease fuel consumption since the steering system does not constantly draw on the engine.
Positive Displacement Hydraulic Pumps
All hydraulic pumps are mounted on a single pump drive for improved serviceability
XT™-3 and XT™-6 Hose
Reliable XT-3 ES and XT-6 ES hoses, along with o-ring face seals and a large capacity life cylinder complete the hydraulic system. Reliable components reduce the risk of leaks and blown lines, helping protect the environment and reducing operating costs.
Automatic Blade Positioning
Operator automation is provided through the use of in-cylinder sensors and implement software.
Advanced design and materials provide superior strength to the purpose built structures.
Combines the use of robotic welding on up to 90 percent of the 824H, while castings are used in several areas to increase strength by helping to spread the loads and reduce the number of parts. This provides highly consistent welds with deep plate penetration and excellent plate fusion. The benefits are increased durability and fatigue strength. The computer controlled machining ensures the alignment of pin bore, axle pad, cab mount and transmission/engine components.
Box Section Engine End Frame
Designed to resist twisting and torsional forces, the box section engine end frame provides a solid foundation for the axles, engine and transmission.
Dozer Front Frame
Built specifically to handle greater amounts of rimpull, the 824H can readily push its weight plus the weight of the material for long distances in heavy dozing applications.
Spread Hitch Design
The spread hitch design improves load distribution by reducing loads to the hitch bearings. The large center hitch design improves hydraulic line routing and makes service access easier.
Upper and Lower Hitch Pins
The hitch pins pivot on double-tapered roller bearings. Box-style sections in the hitch pins and crossmember assembly improve frame structure strength. Increased diameter lower hitch pins add to the robust design.
Engine and Transmission Mounts
A rubber isolation mount design reduces noise and vibration.
Multiple box-section construction with heat treated moldboard and DH-2 steel edges and end bits contribute to long life.
Lift, tilt, tip and ABP are standard. The controls are conveniently located to the right of the operator.
The 824H excels at high production dozing and spreading fill, backfilling, stockpiling, charging hoppers, maintaining haul roads and cleaning up around job sites.
Contact your Cat® dealer for blade options and availability that include:
• Straight Blade
Straight blade is used for general work.
• Extended Wear Bulldozer Arrangement
The Extended Wear bulldozer arrangement is designed for moving large loads over long distances in harsh conditions. It consists of a 6.9 m3 (9 yd3) U-blade with Abrasion Resistant Material (ARM) on the front and sides, cutting edges, push arms and integrated cylinder guards, and a heavy-duty stabilizer.
• Coal Blade
The coal blade can increase coal capacity up to 50 percent per cycle over standard U-blades.
• Woodchip Universal Blade
The woodchip U-blade has a unique wing configuration that provides aggressive side setting into the chip pile, quickly knocking down stacked chips and loading the blade.
Universal Bulldozer Arrangement
6.9 m3 (9 yd3) Universal blade for moving large loads over a long distance while retaining control of the load.
Ask your Cat dealer about Cat Work Tool or Custom options.
Operator Station and Controls
Ergonomically designed for operator comfort with low-effort controls increases efficiency and productivity.
A walk-through operator's station comes from right and left doors that can be fully opened and latched for easy entry and exit.
A thick, non-metallic floor, along with outside the cab hydraulics and a separated cooling system contribute to a quiet work environment.
The internal ROPS and bonded front glass eliminate the distracting metal frames to help increase the viewing area. The angled hood and larger windows allow the operator to see objects closer to the machine.
Cat® Comfort Series Seat
The six-way adjustable seat provides comfort by reducing the pressure on the lower back and thighs while offering unrestricted arm and leg movement. Air suspension adds to the overall comfort level by smoothing the ride over rough terrain.
Blade Control and Joystick
The pod is situated at an 18 degree angle for natural wrist positioning. The controller offers a sturdy handle for multiple hand positions. The actuation button for the blade tip function is located on the joystick, providing total blade control.
The cab features room for a lunch cooler, insulated bottle, cup and other personal items. A coathook is also provided.
A 12-volt, 15-amp converter, speakers, antenna, all wiring and brackets for a communications or entertainment radio is provided.
Caterpillar Monitoring System
Gauges on the left side of the dash monitor fuel level, engine coolant, hydraulic oil and torque converter oil temperatures. The center panel contains the tachometer/speedometer. On the right side panel, a three-level warning system provides full-time monitoring of key functions. The system alerts the operator of immediate or impending problems with air inlet temperature, brake oil pressure, electrical system low voltage, engine oil pressure, engine overspeed, fuel filter status, parking brake status, steering oil pressure and transmission filter status.
12-Volt Power Supply
Radios, phones and laptop computers can be powered from the cab with the 12-volt, 15-amp power supply provided. A laptop computer can run Cat Electronic Technician (ET) software to access the enhanced engine, transmission and blade control system diagnostics.
Standard braking is offered with the right pedal.
Engine deceleration for the first 50 percent of travel is followed by the brakes engaging. This left pedal enables the operator to slow down when the throttle lock is engaged and return to throttle lock without pressing a button.
Similar to cruise control in an automobile, throttle lock allows the operator to preset the engine speed for operator and machine efficiency.
Blended air provides immediate temperature changes, clears windows with ease and improves operator comfort. The system is located behind the operator's seat and uses R134a refrigerant.
Ventilation Ducts and Vents
More airflow is directed to the operator and windows, while post-mounted vents direct air to the rear windows.
Automatic Blade Positioning (ABP)
This patented system is intended to lower fatigue, increase comfort and make operators more productive. It mimics manual functions by automatically lowering the blade when the machine is shifted forward and raising it in reverse. The set points to where the blade raises and lowers can be easily changed from inside the cab. Additionally, a kick-out feature of the system will allow the operator to raise/lower the blade without having to hold the joystick in place. The operator always maintains full control of the blade during this cycle with the ability to override ABP.
Having easy daily maintenance is the way to get it done.
Diagnostics are provided that allow technicians to review a machine's operation and quickly troubleshoot problems. Operating parameters, diagnostic codes and out-of-range gauge readings are displayed through the diagnostic connector. There are also pressure taps for easy hydraulic system checks.
Scheduled maintenance points are well within reach. A remote grease fitting is provided to lubricate the lift cylinder yoke. Removable tread plates in the platform give access to less commonly serviced components. With the 824H, the transmission (ECPC) pressure taps are now located behind the cab, under the platform door for easy access.
Lockable ground level service doors give quick access to engine oil fill and dipstick, coolant sight gauge, rear frame grease fittings, relay panel and electrical breakers. All four maintenance-free batteries are secure in a built-in battery box located in the right rear frame. U-joints are lifetime lubricated, leaving the slip joint as the only driveline component needing grease.
The left platform offers access to the primary filter, while the engine oil filter is accessed from the right platform.
Air Filter Restriction Sight Gauge
This can be viewed from the cab or platform.
Transmission Oil Fill Tube
The tube is located beneath the platform area and the transmission oil dipstick sight gauge is located next to the fill tube for easy maintenance.
500 Hour Oil Change Interval
Uptime and production are increased by doubling the time between oil and filter changes without requiring increased oil sump capacity.
Separated Cooling System
The fan and radiator are isolated away from the engine for a quieter running machine. NGMR reduces radiator repair time. The new metal engine enclosure is completely redesigned for greater durability and to provide easy access for daily maintenance and inspection.
Hinged Hydraulic Oil Cooler
This can be swung open 30 degrees without special tools.
Hinged Air Conditioning Condenser
This swings open 30 degrees and coupled with the swing-out oil cooler, allows the cooling system to be cleaned quickly and easily.
In about 45 minutes, the operator station can be removed or replaced without having to disconnect hydraulic lines. Quick disconnect couplings allow fast disconnect of the air conditioning unit without releasing refrigerant.
Engine Shutdown Switch
This switch is located inside the left radiator screen door for simple access and extended switch life.
The angle of departure is improved from 18 degrees to 20 degrees by shortening the overall machine length.
Maintenance-free batteries are located in the battery box located in the right side bumper for convenient access.
The tool box is located in the left side bumper to provide additional protection against harsh work environments.
Available options can augment the 824H and meet your needs.
The front fenders extend beyond the outermost surface of the machine to prevent mud from splattering the front and side windows and to keep rocks from flying into window glass. The optional full coverage fender package includes front fenders with mud flaps. Full coverage rear fenders extend to the bumper, along with a rear rubber (lateral) fender extension to ensure the entire tire width is covered.
This feature is located on either side of the front frame. For each specific application, there is a correct machine weight for proper balancing of traction, flotation, mobility and response. Lower machine weight is usually required for typical second gear applications such as fill spreading, stockpiling, road maintenance, towing implements and shovel cleanup. Higher machine weight is usually required for such typical first gear applications as heavy dozing and pushloading.
Optional Sliding Cab Window
Located in the right and left doors are optional sliding windows to provide access to outside air without opening the door.
Located on the 824H exterior, floodlights are super damp and will last up to seven times longer than previous lights. An auxiliary light package with the cab (two facing forward and two facing rearward) is available.
Fast Fuel Fill
High speed fueling allows your 824H to stay in production longer.
Cat® Product Link (Attachment)
Product Link allows tracking of machine location and service hours through global positioning technology (GPS) and provides all logged diagnostic codes. This feature is available to dealers in North America and certain licensed countries. To verify if a license exists for your location, please contact your Cat dealer.
Complete Customer Support
Caterpillar® dealers are there to help you keep your machines up and running for maximum productivity.
Make detailed comparisons of the machines under consideration before purchasing. Cat dealers can estimate component life, preventive maintenance cost and the true cost of lost production.
Look past initial price. Consider the financing options available as well as day-to-day operating costs. Look at dealer services that can be included in the cost of the machine to yield lower equipment owning and operating costs over the long run.
Customer Support Agreements
Cat dealers offer a variety of product support agreements and work with their customers to develop a plan that best meets specific needs. These plans can cover the entire machine, including attachments, to help protect the customer's investment.
You will find nearly all parts at our dealer parts counter. Cat dealers use a worldwide computer network to find in-stock parts to minimize downtime. Save money with genuine Cat® Reman parts. You receive the same warranty and reliability as new products at cost savings of 40 to 70 percent.
Improving operating techniques can boost your profits. Your Cat dealer has training video tapes, literature, application and equipment training courses and other ideas to help you increase productivity.
More equipment buyers are planning for effective maintenance before buying equipment. Choose from your Cat dealer's wide range of maintenance services at the time you purchase your machine. Repair option programs guarantee the cost of repairs up front. Diagnostic programs such as S·O·SSM and Coolant Sampling and Technical Analysis help you avoid unscheduled repairs.
Repair, rebuild or replace? Your Cat dealer can help you evaluate the cost involved so you can make the right choice.