Wheel Dozers

844K

Overview

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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    • Blade
      Blade Capacity Range 15.9-30.7 m3 (20.7-40.2 yd3)
    • Engine
      Bore 137.2 mm
      Displacement 27.03 l
      Emissions U.S. EPA Tier 4 Final or Tier 2 Equivalent
      Engine Model Cat® C27 ACERT™
      Gross Power 561 kW
      Gross Power - ISO 14396 561 kW
      Gross Power - SAE J1995 571 kW
      Net Power - SAE J1349 521 kW
      Net Power - SAE J1349 - High Ambient 483 kW
      Net Power - SAE J1349 - Standard Ambient 521 kW
      Peak Torque - Speed 3557 N·m
      Rated Speed 1800 r/min
      Stroke 152.4 mm
      Torque Rise 18 %
    • 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 1 Lock-up disabled
      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
    • Service Refill Capacities
      Cooling System 208 l
      Crankcase 76 l
      Differential - Final Drives - Front 271 l
      Differential - Final Drives - Rear 261 l
      Fuel Tank - Standard 1085 l
      Hydraulic System - Implement and Hydraulic Fan 261 l
      Hydraulic System - Steering and Braking 132 l
      Transmission 110 l
    • Cab
      Air Conditioning Standard air conditioning system contains environmentally friendly R134a refrigerant
      Cab - ROPS/FOPS (1) Cat cab with separate ROPS/FOPS is standard in North America, Europe and Japan.
      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.
      ROPS ROPS meets SAE J11040 APR88, ISO 3471:2008 and ISO 3471:1994 criteria.
    • Brakes
      Brakes Meets ISO 3540:2011
    • Axles
      Front Fixed
      Oscillation Angle 8.5 °
      Rear Trunnion
    • 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)
    • Dimensions (Approximate)
      Centerline of Front Axle to Hitch 2300 mm
      Centerline of Rear Axle to Edge of Bumper 3795 mm
      Ground Clearance 596 mm
      Height - Top of Exhaust Pipe 5049 mm
      Height - Top of Hood 3862 mm
      Height - Top of ROPS 5240 mm
      Length - With Blade on Ground 11120 mm
      Wheel Base 4600 mm
    • Hydraulic System - Steering
      Maximum Flow 357 l/min
      Minimum Turning Radius - Over Blade 10369 mm
      Relief Valve Setting 31000 kPa
      Steering System - Circuit Pilot, load sensing
      Steering System - Pump Piston, variable displacement
      Total Steering Angle 35 °
    • Hydraulic System - Lift/Tilt
      Cylinder, Double Acting - Tilt and Tip, Bore and Stroke 210 mm × 188 mm (8.25 in × 7.4 in)
      Cylinders, Double Acting - Lift, Bore and Stroke 133 mm × 1535 mm (5.25 in × 60.4 in)
      Output at 2,000 rpm and 6900 kPa (1,000 psi) 311 l/min
      Relief Valve Setting - Bulldozer (Large Pump) 18650 kPa
      Relief Valve Setting - Tilt Cylinders (Small Pump) 20150 kPa

    Product Downloads

    844K Product Brochure

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