US
METRIC
844
KEY SPECS
- Engine Model C27 Cat®
- Rated Speed 1800.0r/min
- Gross Power - ISO 14396 561.0kW
OVERVIEW
BENEFITS
-
IMPROVED EFFICIENCY
- Lock-up torque converter, combined with an on-demand cooling fan and advanced engine idle management, delivers a more smooth shift
-
ENHANCED MAINTENANCE
- Service access is conveniently located, helping to reduce maintenance time
-
ADDITIONAL SAFETY
- Grouped, ground level engine and machine controls allow for safe and easy daily maintenance
-
UP TO 18% LESS CO2 EMISSIONS
- The 844 emits up to 18% less CO2 than the previous 844H.
FEATURES AT A GLANCE
Long Term Value and Durability
Unmatched Durability
- The full box-section rear frame resists torsional shock and twisting forces.
- Solid through-width push beams transfer and absorb stresses through a larger portion of the frame.
- Robust structures withstand the toughest conditions and multiple lifecycles to improve your bottom line.
- Resilient, durable blades are designed with excellent dozing and rolling characteristics.
- Optimized axle mounting results in increased structural integrity.
- Castings in the engine and frame are used in high stress areas to spread high loads.
- One-piece castings enhance strength in key pin areas.
Move More with Less Fuel
Optimum Efficiency
- Experience reliable efficiency with complete control over injection timing, duration, and pressure with Mechanically Actuated Electronic Unit Injection (MEUI™).
- Best-in-class Cat planetary powershift transmission features consistent, smooth shifting and efficiency through integrated electronic controls.
- Extended engine life and improved fuel efficiency with reduced rated speed.
- Impeller Clutch Torque Converter (ICTC) and Rimpull Control System (RCS) provide precise rimpull control.
- Load sensing hydraulic steering system enables precise machine control for easier loading.
- Lock-up torque converter with advanced control of lock-up speed.
- On demand cooling fan protects investment and lengthens lifecycle.
Safety First
Increased Safety
- Battery disconnect, emergency engine shutdown, and stairway light switch are accessed through the ground level power service center.
- Optional Cat Detect with Object Detection System (rearview camera and radar) or Vision (rearview camera) increase operator awareness around the machine.
- Cab-mounted LED strobes provide warning for others near the machine.
- Wider stairs with reduced stair angles increase safety for operators.
- Access stairs via a powered platform from cab or ground level and have emergency egress access.
Technology that Gets Work Done
Innovative Technology
- Integrated technologies allow you to monitor, manage, and enhance your jobsite operations.
- Product Link™ remote monitoring provides valuable insight into machine or fleet performance through the VisionLink® interface, so you can make decisions that boost jobsite efficiency and lower operating costs.
- Vital Information Management System (VIMS™) 3G touchscreen monitor gives access to a wide range of sensor information and enhanced machine data to resolve problems before machine failure.
- Optional Cat Detect technologies enhance awareness of the environment around the machine for increased safety.
Work In Comfort
Enhanced Operator Comfort
- Steering and Transmission Integrated Control System (STIC™) combines directional selection, gear selection, and steering into a single lever, maximizing responsiveness and control while reducing operator fatigue.
- Operators can easily enter and exit the cab with fold-up STIC steer/armrest, reduced access stairway angles, and standard stairway lighting.
- Experience reduced vibrations with isolated cab mounts and seat-mounted implement and steering controls.
- Reduced interior sound levels keep operators comfortable throughout their entire shift.
Reduce Environmental Impact
Improved Sustainability
- Meets U.S. EPA Tier 4 Final emissions standards.
- Emits up to 18% less Co2 /hr.*
- Automatic Engine Idle Shutdown conserves fuel when machine is not in use.
- Generate less waste with maintenance-free batteries.
- Maximize machine life and lower operating costs with Caterpillar Reman and Certified Rebuild programs, which utilize reused or remanufactured components for 40 to 70 percent cost savings.
- Retrofit packages from Caterpillar deliver new features to older machines to get the most from your investment.
Save on Service and Maintenance
Simplified Maintenance
- Swing-out fuel, hydraulic oil coolers, and condenser allow for easy access cleanout.
- Machine features ground level or platform access to easily reach daily service points.
- Swing-out doors on either side of the engine compartment provide easy access to critical daily service checks.
- Optional tire pressure monitoring system provides real-time information to the operator in the cab for optimized tire life.
- Electronics bay is conveniently located inside the cab.
- Sight gauges offer quick visual inspection to minimize fluid contamination.
- Lighting inside the engine compartment improves visibility to service points.
- Ecology drains prevent spills and allow for easier service.
- 500-hour engine oil and filter change interval with S•O•S oil sampling analysis.
- Service center includes drain and fill, electronic technician connection, and fluid level status.
- Axle oil cooler and Automatic Retarder Control prevents unnecessary wear from accelerating down declines.
Purpose-Built Cat Attachments
Built for Your Operation
- Dependable blades are designed for mining with press rib construction and optimized widths and capacities for excellent dozing and rolling.
- Available Cat coal blades retain load control and a large capacity for lighter materials.
- Semi-U Blade features the increased capacity and spreading capabilities of a straight blade.
- Heavy-Duty Semi-U blade includes a Hardox 400 Liner plate, side plates, and additional reinforcements at the bottom of the blade.
- Equipped with the Cat MineStar System, a suite of integrated mine operations and mobile equipment technologies.
- Cat MineStar’s capabilities help manage all aspects of operation.
- Fleet provides remote machine tracking capabilities.
- Terrain for Loading enables high precision management of load management.
- Detect assists the operator with areas of limited visibility.
- Health delivers machine condition and operating data and diagnostic tools for longer machine lifecycle.
SPECIFICATIONS
- Engine Model C27 Cat®
- Rated Speed 1800.0r/min
- Gross Power - ISO 14396 561.0kW
- Gross Power - SAE J1995 571.0kW
- Net Power - SAE J1349 - Standard Ambient 521.0kW
- Net Power - SAE J1349 - High Ambient 483.0kW
- Bore 137.2mm
- Stroke 152.4mm
- Displacement 27.03l
- Peak Torque - Speed 3557.0N·m
- Torque Rise 18.0%
- Emissions U.S. EPA Tier 4 Final and EU Stage V or China Nonroad Stage III Emissions standards, equivalent to U.S. EPA Tier 2
- Operating Weight 74883.0kg
- Blade Capacities 15.9 - 30.7 m3 (20.7 - 40.2 yd3)
- Transmission Type Cat Planetary Power Shift
- Converter Drive - Forward 1 7.3km/h
- Converter Drive - Forward 2 13.3km/h
- Converter Drive - Forward 3 22.9km/h
- Converter Drive - Reverse 1 7.9km/h
- Converter Drive - Reverse 2 14.7km/h
- Converter Drive - Reverse 3 24.9km/h
- Direct Drive - Forward 1 Lock-up disabled
- Direct Drive - Forward 2 13.7km/h
- Direct Drive - Forward 3 24.5km/h
- Direct Drive - Reverse 1 8.7km/h
- Direct Drive - Reverse 2 15.4km/h
- Direct Drive - Reverse 3 26.4km/h
- Output at 2,000 rpm and 6900 kPa (1,000 psi) 311.0l/min
- Cylinders, Double Acting - Lift, Bore and Stroke 133 mm × 1535 mm (5.25 in × 60.4 in)
- Cylinder, Double Acting - Tilt and Tip, Bore and Stroke 210 mm × 188 mm (8.25 in × 7.4 in)
- Relief Valve Setting - Bulldozer (Large Pump) 18650.0kPa
- Relief Valve Setting - Tilt Cylinders (Small Pump) 20150.0kPa
- Steering System - Circuit Pilot, load sensing
- Steering System - Pump Piston, variable displacement
- Minimum Turning Radius - Over Blade 10369.0mm
- Total Steering Angle 35.0°
- Maximum Flow 357.0l/min
- Relief Valve Setting 31000.0kPa
- Fuel Tank - Standard 1085.0l
- Cooling System 208.0l
- Crankcase 76.0l
- Transmission 110.0l
- Differential - Final Drives - Front 271.0l
- Differential - Final Drives - Rear 261.0l
- Hydraulic System - Implement and Hydraulic Fan 261.0l
- Hydraulic System - Steering and Braking 132.0l
- Air Conditioning The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.8 kg of refrigerant which has a CO2 equivalent of 2.574 metric tonnes.
- Front Fixed
- Rear Trunnion
- Oscillation Angle 8.5°
- Brakes Meets ISO 3540:2011
- Operator Sound Level (ISO 6396:2008) 69.0dB(A)
- Machine Sound Level (ISO 6395:2008) 115.0dB(A)
- Operator Sound Level (ISO 6396:2008) 69.0dB(A)
- Machine Sound Level (ISO 6395:2008) 113.0dB(A)
- ROPS/FOPS ISO 3471:2008 and ISO 3449:2005 Level II Standards
- Height - Top of ROPS 5240.0mm
- Height - Top of Exhaust Pipe 5049.0mm
- Height - Top of Hood 3862.0mm
- Ground Clearance 596.0mm
- Centerline of Front Axle to Hitch 2300.0mm
- Centerline of Rear Axle to Edge of Bumper 3795.0mm
- Wheel Base 4600.0mm
- Length - With Blade on Ground 11120.0mm
PRODUCT BROCHURES AND MORE ARE READY TO DOWNLOAD!
Caterpillar product brochures and other informational documents are available for your growing business.
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