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CAT<sup>®</sup> 844K

Dozers 844K

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Key Information

Engine Model

C27 CAT®

Gross power

561 kW

Operating weight

74,883 kg

Overview

Mobile. Maneuverable. Versatile.

Cat wheel loaders are designed to provide maximum durability and ensure optimal availability over multiple lifecycles. With their optimized performance and simplified maintenance, our machines allow you to move more materials safely and efficiently, at a lower cost per ton. Designed for demanding work in large push applications, the 844 K Wheel Dozer is the largest in the Cat wheel dozer range. It is ideal for large-scale mining operations, power plants, the construction sector, and any application requiring mobility, versatility, and compaction.

Advantages

Improved Efficiency

A lock-up torque converter, combined with a variable speed cooling fan and an advanced engine idle management system, provides an exceptional level of flexibility during gear changes.

Optimized Maintenance

Maintenance points are intelligently placed, reducing maintenance time.

Enhanced Safety

Machine and engine controls grouped at ground level for easy and secure routine maintenance.

Key Features

  • Value and long-term longevity
  • Designed to be efficient
  • Performances and productivity
  • Best Working Comfort
  • Integrated CAT® Technologies
  • Safety first
  • Ease of maintenance
  • Top-notch service and assistance

Value and long-term longevity

844K - Value and long-term longevity

Robust Structures Boost your results with ultra-resistant structures capable of performing multiple life cycles and supporting the most difficult loading conditions. The fully boxed rear frame resists both torsional forces and shocks. Molded parts in the rear frame are used in areas exposed to high stress to distribute the load. The molded axle pivot mounting areas allow for better stress dissipation for increased structural integrity. 90% of the machine's structure is welded using a robotic system to achieve the most uniform and resistant welds possible. Chassis Our specially designed front and rear chassis are synonymous with maximum availability and productivity for you. The fully boxed chassis absorbs torsional forces during backfilling, maintaining alignment of articulation axes and the driveshaft. The spaced pivot joint design is equipped with double tapered roller bearings and hardened axles resistant to horizontal and vertical loads. Increased strength in key areas thanks to the use of monoblock castings. Push Bar and Push Arm Blade Design Solid monoblock push bars are attached across the entire width of the chassis, not just on the side, to ensure optimal lifespan and reliability. In the corners of the backfill, the stresses are thus transmitted and absorbed by a larger part of the chassis.

Designed to be efficient

844K - Designed to be efficient

Integrated Steering and Transmission Control System (STIC) Benefit from maximum responsiveness and control with the STIC system, which combines direction selection, gear selection, and steering into a single lever. A simple movement of the lever to the left or right allows for turning left or right, minimizing driver effort. Ultra-easy gear selection at the touch of a finger. Smoother, faster cycles and less fatigue for operators thanks to integrated controls that require minimal effort. Cat Planetary Powershift Transmission Your success depends on a superior transmission specifically designed for mining applications. Smooth and efficient gear shifting thanks to integrated electronic controls. Longevity and reliability ensured by heat treatments and metallurgical processes on the gears. Three forward gears and three reverse gears to adapt to all your applications. Cat C27 Engine The exceptional longevity and efficiency of your 844K come from its Cat C27 engine. Its 12 cylinders with direct injection naturally provide optimal performance. Optimized performance and quick engine response thanks to an electronic control module. Reliable efficiency with perfect control of timing, duration, and injection pressure thanks to the electronically controlled mechanical unit injectors (MEUI). Increased engine life and improved energy efficiency thanks to lower rated speed. Designed to comply with the US EPA Tier 4 Final standard or equivalent to Tier 2 emissions standard. Impeller Clutch Torque Converter (ICTC) and Rimpull Control System (RCS) Reduce your cost per ton by using advanced ICTC and RCS systems to control rim effort. Reduce tire slippage and wear by controlling rim effort from 100% to 25% using the left brake pedal. Once the position corresponding to a 25% reduction in rim effort is reached, the pedal is used for braking again. Decrease the risk of wheel slippage without reducing hydraulic efficiency of the machine thanks to RCS. Improve energy efficiency in certain applications with the lock-up torque converter allowing for direct drive.

Performances and productivity

844K - Performances and productivity

Electro-hydraulic Controls The increased responsiveness of the equipment allows drivers to enhance their productivity. Work comfortably with electronically controlled hydraulic cylinder stops. Enjoy smooth and easy-to-use controls. Blade Responsiveness The speed of the blade movement is adjusted according to your application to improve driver efficiency. Three different speeds: slow, medium, and fast. Simple configuration via the Advisor display module. Only the lifting and lowering functions of the blade are affected. Steering Circuit Safe operation of the loader begins with precise machine control. That's why we equipped our 844K wheel loader with a load-sensing hydraulic steering circuit. Increase your efficiency with our variable displacement pumps. Ensure precise positioning for easy loading in tight workspaces with a 35-degree articulation angle. Enhance driver comfort with integrated steering and transmission controls. Filtration System Benefit from improved performance and reliability of your hydraulic circuit with our advanced filtration system. Return filters for lift/tilt circuit. High-pressure filters for lift/tilt circuit. Return filters for steering circuit. High-pressure screen for steering. Return hydraulic filters. Front pump drive lubrication filter. Front and rear brake oil screens.

Best Working Comfort

844K - Best Working Comfort

More efficient and comfortable work for drivers thanks to a cabin inspired by our customers. Entry and Exit Easy access to the cabin thanks to its new ergonomic design. Access points on both sides. Foldable armrest/STIC steering. Reduced access ladder angles. Comfort Cat Series III Seat Improve driver comfort and reduce fatigue with the Comfort Cat Series III seat. High backrest design and ultra-thick padded cushions. Pneumatic suspension system. Levers and seat controls within reach. Adjustable in 6 directions. Equipment control box and STIC steering mounted on the seat and moving with it. 76 mm (3 in) wide retractable seat belt. Instructor Seat Comfortably and safely train other drivers with our series instructor seat. 76 mm (3 in) wide retractable seat belt. Foldable seat with cup holder and molded storage compartment. Driving Station Improve your drivers' productivity with the clean and comfortable environment of our cabins. Enjoy the low level of vibrations achieved thanks to the new cabin viscous mounts and seat pneumatic suspension. Maintain the desired temperature inside the cabin with automatic temperature controls. Pressurized cabin with filtered air. Reduced noise level at 69 dB(A). Conveniently positioned storage tray/lunch basket at ground level.

Integrated CAT® Technologies

844K - Integrated CAT<sup>®</sup> Technologies

The electronic circuits of the 844 K model have been fully integrated to function as a single machine. This integration creates an intelligent machine and allows the driver to be better informed for improved productivity. Vims 3g We have worked tirelessly to help our customers and drivers optimize their performance through our Vital Information Management System (VIMS 3G). The Advisor display features a wide screen for increased visibility. Intuitive operation and easy navigation thanks to our enhanced user interface. Drivers are kept informed at all times of any anomalies or system operation, for reduced maintenance times. Driver Profile The comfort of a driver begins with the personalized adjustment of machine features. Our Advisor display allows the driver to instantly recall customized profiles. Save up to 10 distinct driver profiles via Advisor. Reduce the time it takes to adjust from one driver to another by recalling personalized settings.

Safety first

844K - Safety first

We are constantly improving our products to provide a safe working environment for the operator and the people working on the construction site. Machine Access The wider and less inclined ladder improves the safety of the operator when climbing up or down the 844K. The walkways are equipped with non-slip surfaces and locking/tagging points are integrated into the maintenance areas. The windshield cleaning platforms provide secure and convenient access for the operator. Three points of contact can be maintained at all times through maintenance areas accessible from the ground or a platform. Emergency exit. Visibility The retractable blind and optional heated mirrors ensure optimal visibility for increased safety. The Cat Detect option with integrated object detection system (rear vision camera and radar) or Vision (rear vision camera) informs the operator of what is happening around the machine. The standard installed high-intensity discharge (HID) headlights provide excellent visibility of the work area. LED beacons mounted on the cabin. Driving Position Reduced vibrations felt by the operator thanks to the pneumatic suspension seat and the cabin's viscous mounts. Low interior noise levels. Facilitated training for new operators thanks to the instructor seat. 76 mm (3 in) seat belts installed as standard on the operator seat and instructor seat. Motorized Access System The Cat motorized access system allows for easier access to the first steps by allowing easier climbing onto or descending from the rear platform. A safe and ergonomic access system. All operators have enough space to safely use the wide staircase. The use of handrails located on both sides of the stairs ensures a constant three-point contact. Lower platform lifting from the cabin or the ground. Quick exit of occupants possible thanks to a smartly located emergency release valve, in case the loader becomes uncontrollable.

844K -

Ease of maintenance

844K - Ease of maintenance

Because the very design of our 844 K allows for reduced downtime, it will be the key to your success. Longer maintenance intervals for fluids and filters. Safe and convenient maintenance thanks to grouped maintenance points, accessible from the ground or platform. Swinging doors on both sides of the engine compartment make it easy to access daily maintenance checkpoints. Environmentally friendly drain valves facilitate maintenance and prevent the spillage of potentially hazardous contaminants. Centralized remote pressure outlets. Reduce your downtime with notifications from our VIMS management system, allowing drivers and technicians to address issues before they even occur.

Top-notch service and assistance

844K - Top-notch service and assistance

Legendary Cat Dealer Support A true partner, your Cat dealer is always there when needed. Preventive maintenance programs and guaranteed maintenance contracts. Unmatched availability of parts. Improve your efficiency through driver training. Remanufactured genuine Cat parts.

Contact Our Experts

International

+33 1 71 90 40 50

Monday to Friday 8am-5:30pm (UTC)

Product Specifications for 844K

  • ENGINE
    • Engine ModelCAT® C27
    • Gross Power561 kW
    • Bore137.2 mm
    • Stroke152.4 mm
    • Displacement27.03 l
    • Torque Reserve18%
    • Net Power - SAE J1349 - Standard Ambient521 kW
    • Net Power - SAE J1349521 kW
    • Gross Power - ISO 14396561 kW
    • Net Power - SAE J1349 - High Ambient483 kW
    • Maximum Torque Speed3557 Nm
    • EmissionsEPA Tier 4 Final for the United States OR equivalent to Tier 2 standards
    • Rated Speed1800 RPM
    • Gross Power - SAE J1995571 kW
  • WEIGHT
    • Operating Weight74,883 kg
  • TRANSMISSION
    • Converter Drive, Forward 17.3 km/h
    • Converter Drive, Forward 213.3 km/h
    • Converter Drive, Forward 322.9 km/h
    • Converter Drive, Reverse 17.9 km/h
    • Converter Drive, Reverse 214.7 km/h
    • Converter Drive, Reverse 324.9 km/h
    • Direct Drive, Forward 213.7 km/h
    • Direct Drive, Forward 324.5 km/h
    • Direct Drive, Reverse 18.7 km/h
    • Direct Drive, Reverse 215.4 km/h
    • Direct Drive, Reverse 326.4 km/h
    • Transmission TypeCat Planetary Powershift Transmission
    • Direct Drive, Forward 1Lockout Disabled
  • MAINTENANCE CAPACITIES
    • Fuel Tank, Standard1085 l
    • Hydraulic System: Equipment and Fan Hydraulic System261 l
    • Hydraulic System: Steering and Brake132 l
    • Cooling System208 l
    • Transmission110 l
    • Differential - Final Drives - Front271 l
    • Differential - Final Drives - Rear261 l
  • CAB
    • Cab - ROPS/FOPS (1)Cat cab with Rollover Protective Structure/Falling Object Protective Structure (ROPS/FOPS) is standard in North America, Europe, and Japan.
    • Air ConditioningStandard air conditioning circuit contains environmentally friendly R134a refrigerant.
    • ROPSRollover Protective Structure ROPS is in compliance with SAE J11040 APR88, ISO 3471:2008, and ISO 3471:1994 standards.
    • Cab - ROPS/FOPS (2)SAE J11040 APR88, ISO 3471:2008, ISO 3471:1994
    • FOPSFalling Object Protective Structure FOPS is in compliance with SAE J231 JAN81 and ISO 3449:1992 Level II standards.
  • BRAKES
    • BrakesCompliant with ISO 3540:2011 standard
  • AXLES
    • FrontFixed
    • RearOscillating
    • Swing Angle8.5°
  • BLADE
    • Blade Capacity Range15.9 to 30.7 m3 (20.7 to 40.2 yd3)
  • SOUND LEVELS: STANDARD
    • Machine Sound Level (ISO 6395:2008)115 dB(A)
    • Operator Sound Pressure Level (ISO 6396:2008)69 dB(A)
  • SOUND LEVELS: QUIET CAB
    • Machine Sound Level (ISO 6395:2008)113 dB(A)
    • Operator Sound Pressure Level (ISO 6396:2008)69 dB(A)
  • HYDRAULIC SYSTEM: LIFT/TILT
    • Relief Valve Setting - Tilt Cylinders (small pump)20150 kPa
    • Flow at 2000 RPM and 6900 kPa (1000 psi)311 l/min
    • Double-Acting Cylinders - Lift, Bore and Stroke133 mm × 1535 mm (5.25 in × 60.4 in)
    • Relief Valve Setting - Dozer (large pump)18650 kPa
    • Double-Acting Cylinder: Tilt and Pitch, Bore and Stroke210 mm × 188 mm (8.25 in × 7.4 in)
  • HYDRAULIC SYSTEM: STEERING
    • Total Steering Angle35°
    • Steering Circuit: CircuitPilot, Load Sensing
    • Minimum Turning Radius - Blade Included10369 mm
    • Relief Valve Setting31000 kPa
    • Steering Circuit: PumpPiston, Variable Displacement
    • Maximum Flow357 l/min
  • DIMENSIONS (APPROXIMATE)
    • Height - Top of Exhaust Stack5049 mm
    • Wheelbase4600 mm
    • Length - With Blade on Ground11120 mm
    • Axle Center to Bumper3795 mm
    • Axle Center to Hitch2300 mm
    • Height - Top of ROPS5240 mm
    • Ground Clearance596 mm
    • Height - Top of Hood3862 mm

Standard Equipment for 844K

  • DRIVER'S COMPARTMENT
    • Air Conditioner and Heater with Automatic Temperature Control
    • Pressurized and Soundproofed Cabin, Rollover Protective Structure (ROPS/FOPS), Ambient Radio Ready (Antenna, Speakers, and Converter, 12V, 10-15A)
    • 12V Power Outlet for Cell Phones or Laptop Connection
    • Rear Vision Camera
    • Cigarette Lighter and Ashtray
    • Clothes Hook
    • Electrohydraulic Blade Controls (Mounted on Seat)
    • Folding Armrest
    • Heater and Defroster
    • Electric Horn
    • Hydraulic Equipment Lockout
    • Instruments, Indicators: - Engine Coolant Temperature - Fuel Level - Ground Speed - Gear - Hydraulic Oil Temperature - Speedometer/Tachometer - Torque Converter Temperature
    • Instrumentation, Warning Lights: - Three-Level Warning System - Automatic Transmission Model Auto-Engage Status - Brake Failure - Bucket Free Position Status - Delayed Engine Shutdown Status - Engine Idle Cut-off Status - Engine Failure - Fuel Saver Mode Activation - Hydraulic System Safety - Lockup Clutch Engagement Status - Low Fuel Level - Parking Brake Status - Rim Pull Control Activation - Seat Belt Warning - Auxiliary Steering (as equipped) - Throttle Lock Status - Transmission Gear
    • Keypad, Command with Indicator Lights: - Automatic Transmission Mode RPM Range - Automatic/Manual Transmission Mode - Lockup Clutch - Reduced Rim Pull - Throttle Lock
    • Ceiling Light (Cabin)
    • Lunchbox and Cup Holder Mounts
    • Mirrors (Mounted Outside)
    • Comfort Cat Seat (Fabric Upholstery) with Air Suspension
    • 76mm (3 in) Retractable Seat Belt
    • STIC Control System with Steering Lock
    • Tinted Window
    • Instructor Seat with Lap Belt
    • 3G Vital Information Management System (VIMS) with Graphic Display: External Data Port, Customizable Driver Profiles
    • Wipers with Integrated Washer (Front, Rear, and Corner), Intermittent Front Wiper
  • POWERTRAIN
    • Completely Hydraulic, Oil Bathed Brakes Under Hood
    • Oil Bathed Wheel Half Shafts Disc Service Brake
    • Electrohydraulic Parking Brake
    • Return to Tank Filters
    • Cat Clean Emissions Module (Tier 4 only)
    • Variable Speed Fan
    • Cat C27 Engine
    • Fuel Priming Pump (Electric)
    • Ground Level Engine Shutdown, Bumper
    • Muffler (Under Hood) (Tier 2 only)
    • Engine Air Inlet Precleaner
    • Modular Aluminum Radiator (AMR)
    • Separated Cooling Circuit
    • Starting Aid, (Ether) Manual Override
    • Throttle Lock
    • Torque Converter, Modulation Clutch with Lockup and Rim Pull Control System
    • 534mm (21 in) Transmission, Planetary Powershift (Electronic) Transmission (3F/3R)
  • ELECTRICAL EQUIPMENT
    • Reverse Warning
    • Alternator, 150A
    • Maintenance-Free Batteries (2 - 1,400 CCA)
    • 10/15A, 24V to 12V Converter
    • Deutsch Component Connectors
    • 24V Electrical Circuit
    • Electronic Transmission Control
    • Lighting Circuit, Halogen Headlights (Front and Rear), Access Ladder, Engine Compartment
    • Starter, Electric
    • Starter Lock in Bumper
    • Emergency Starting Receptacle
    • Transmission Lock in Bumper
  • OTHER
    • Axle Temperature Sensor
    • Battery Disconnect and Jump Start Receptacle, Bumper
    • Axial O-Ring Seals, Caterpillar
    • Economy Mode with Demand Acceleration
    • Platform Emergency Descent
    • Engine, Oil Pan, 500-Hour Interval with CH4
    • Idle Engine Management System Features: - Auto Engine Idle Down - Delayed Engine Shutdown - Engine Idle Cut-off
    • Fenders, Steel (Front)
    • Undercarriage, Pan and Powertrain Guard
    • Lubrication Points Grouped and Tagged
    • Towing, Tow Bar with Pin
    • XT Cat Hoses
    • Oil Sampling Ports
    • Positive Flow Hydraulic Circuit
    • Product Link™
    • Level Gauges: Hydraulic Tanks, Steering/Fan and Equipment/Brake and Transmission
    • Access Ladder, Rear Access Left and Right
    • Load Sensing Steering
    • Auxiliary Steering
    • Kick Plates
    • Antivandalism Locks
    • Venturi Stack
    • 50% Pre-Mixed Extended Life Coolant, Freeze Protection to -34°C (-29°F)

Available Options for 844K

  • POWERTRAIN
    • Antifreeze -50°C (-58°F)
    • High-Speed Engine Oil Drain System, Wiggins
    • Engine Block Heater (120V or 240V)
    • High Ambient Temperature Cooling, Software-Controlled
  • BLADES
    • Semi-U Blade - 17.8 m3 (23.3 yd3)
    • Extra-Heavy-Duty Semi-U Blade - 16.1 m3 (21.1 yd3)
    • Coal Blade - 30.7 m3 (40.2 yd3)
  • DRIVER'S COMPARTMENT
    • Cabin Prefilter
    • AM/FM/CD/MP3 Radio
    • Sirius Satellite Radio with Bluetooth
    • Strobe Warning
    • CB Radio Ready
    • Sun Visor for Windshield
  • MISCELLANEOUS EQUIPMENT
    • Front and Rear Road Travel Fenders
    • Quick Fuel Fill System (Shaw-Aero)
    • Axle Oscillation Limit
    • Black Paint on Rear of Blade

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