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844K

Wheel Dozers

Cat Wheel Dozers are designed with durability built in, ensuring maximum availability through multiple life cycles. With optimized performance and simplified serviceability, our machines allow you to move more material efficiently and safely at a lower cost per ton. Engineered for your demanding work in large dozing applications, the 844K Wheel Dozer is the largest in the Cat Wheel Dozer line and is an ideal match for large mining operations, power generating utilities, the general contracting industry and wherever mobility, versatility and compaction is needed.

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Engine Model C27 Cat®
Gross Power 561 kW
Bore 137.2 mm
Stroke 152.4 mm
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844K
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OVERVIEW

Mobile. Agile. Versatile.

FEATURES & BENEFITS

Long Term Value and Durability

Robust StructuresYour bottom line is improved by highly durable structures that achieve multiple life cycles and withstand the toughest loading conditions.Full box-sectio... Read more

Built to Perform

Steering and Transmission Integrated Control System (STIC™)Experience maximum responsiveness and control with STIC that combines directional selection, gear selection and... Read more

Performance and Productivity

Electro Hydraulic ControlsOperators increase productivity with our responsive implements feature.Operate comfortably through electronically controlled hydraulic cylinder... Read more

Work In Comfort

Your operators can work more efficiently and stay comfortable with our customer-inspired cab features.Entry and ExitEnter and exit the cab easily and safely with these ne... Read more

Integrated Cat® Technologies

The 844K electronic systems have been completely integrated to function as one machine. This integration creates a smart machine and more informed operator, maximizing th... Read more

Technology that Gets Work Done

Cat MineStar System is the industry's broadest suite of integrated mine operations and mobile equipment management technologies, configurable to suit your operation's nee... Read more

Safety First

We are constantly improving our products in an effort to provide a safe work environment for the operator and those who work on your job site.Machine AccessWider stairs w... Read more

Save on Service and Maintenance

We can help you succeed by ensuring your 844K has design features to reduce your downtime.Longer service intervals on fluids and filters.Safe and convenient service with... Read more

Top-Tier Service and Support

Legendary Cat Dealer SupportA valued partner, your Cat dealer is available whenever you need them.Preventive maintenance programs and guaranteed maintenance contracts.Bes... Read more

SPECIFICATIONS FOR 844K

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Engine
Engine Model C27 Cat®
Gross Power 561 kW
Bore 137.2 mm
Stroke 152.4 mm
Displacement 27.03 l
Torque Rise 18 %
Net Power - SAE J1349 - Standard Ambient 521 kW
Net Power - SAE J1349 521 kW
Gross Power - ISO 14396 561 kW
Net Power - SAE J1349 - High Ambient 483 kW
Peak Torque - Speed 3557 N·m
Emissions U.S. EPA Tier 4 Final or Tier 2 Equivalent
Rated Speed 1800 r/min
Gross Power - SAE J1995 571 kW
Weights
Operating Weight 74883 kg
Transmission
Converter Drive - Forward 1 7.3 km/h
Converter Drive - Forward 2 13.3 km/h
Converter Drive - Forward 3 22.9 km/h
Converter Drive - Reverse 1 7.9 km/h
Converter Drive - Reverse 2 14.7 km/h
Converter Drive - Reverse 3 24.9 km/h
Direct Drive - Forward 2 13.7 km/h
Direct Drive - Forward 3 24.5 km/h
Direct Drive - Reverse 1 8.7 km/h
Direct Drive - Reverse 2 15.4 km/h
Direct Drive - Reverse 3 26.4 km/h
Transmission Type Cat Planetary Power Shift
Direct Drive - Forward 1 Lock-up disabled
Service Refill Capacities
Fuel Tank - Standard 1085 l
Cooling System 208 l
Crankcase 76 l
Transmission 110 l
Differential - Final Drives - Front 271 l
Differential - Final Drives - Rear 261 l
Hydraulic System - Implement and Hydraulic Fan 261 l
Hydraulic System - Steering and Braking 132 l
Cab
Cab - ROPS/FOPS (1) Cat cab with separate ROPS/FOPS is standard in North America, Europe and Japan.
Air Conditioning Standard air conditioning system contains environmentally friendly R134a refrigerant
ROPS ROPS meets SAE J11040 APR88, ISO 3471:2008 and ISO 3471:1994 criteria.
Cab - ROPS/FOPS (2) SAE J11040 APR88, ISO 3471:2008, ISO 3471:1994
FOPS FOPS meets SAE J231 JAN81 and ISO 3449:1992 Level II criteria.
Brakes
Brakes Meets ISO 3540:2011
Axles
Front Fixed
Rear Trunnion
Oscillation Angle 8.5 °
Blade
Blade Capacity Range 15,9-30,7 m3 (20,7-40,2 yd.3)
Sound Performance - Standard
Machine Sound Level (ISO 6395:2008) 115 dB(A)
Operator Sound Level (ISO 6396:2008) 69 dB(A)
Sound Performance - Suppression
Machine Sound Level (ISO 6395:2008) 113 dB(A)
Operator Sound Level (ISO 6396:2008) 69 dB(A)
Hydraulic System - Lift/Tilt
Relief Valve Setting - Tilt Cylinders (Small Pump) 20150 kPa
Output at 2,000 rpm and 6900 kPa (1,000 psi) 311 l/min
Cylinders, Double Acting - Lift, Bore and Stroke 133 mm × 1535 mm (5.25 in × 60.4 in)
Relief Valve Setting - Bulldozer (Large Pump) 18650 kPa
Cylinder, Double Acting - Tilt and Tip, Bore and Stroke 210 mm × 188 mm (8.25 in × 7.4 in)
Hydraulic System - Steering
Total Steering Angle 35 °
Steering System - Circuit Pilot, load sensing
Minimum Turning Radius - Over Blade 10369 mm
Relief Valve Setting 31000 kPa
Steering System - Pump Piston, variable displacement
Maximum Flow 357 l/min
Dimensions (Approximate)
Height - Top of Exhaust Pipe 5049 mm
Wheel Base 4600 mm
Length - With Blade on Ground 11120 mm
Centerline of Rear Axle to Edge of Bumper 3795 mm
Centerline of Front Axle to Hitch 2300 mm
Height - Top of ROPS 5240 mm
Ground Clearance 596 mm
Height - Top of Hood 3862 mm

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Gross Power 676 kW
Operating Weight 101720 kg
Emissions (U.S. EPA Tier 4 Final): Gross Power - SAE J1995 671 kW
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Engine Model C27 Cat®
Rated Speed 1800 r/min
Gross Power - ISO 14396 561 kW
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Engine Model Cat® C15 
Net Power - ISO 9249 302 kW
Stroke 171.4 mm
Gross Power 324 kW
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Gross Power 512 kW
Net Power 468 kW
Bore 137 mm
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Engine Model Cat C7.1
Net Power (SAE J1349:2011) 186 kW
Net Power (ISO 9249:2007) 186 kW
Emissions U.S. EPA Tier 4 Final/EU Stage V
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Transmission Type Cat Planetary Power Shift
Oscillation Angle ±11°
Rear Planetary – Oscillating
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Engine Model Cat C32B
Operating Weight 101898 kg
Emissions (U.S. EPA Tier 4 Final): Gross Power - SAE J1995 671 kW
Emissions (U.S. EPA Tier 4 Final): Net Power ISO - 9249 607 kW
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