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Wheel Dozers

844K Wheel Dozer

Engine Model

C27 Cat®

Gross Power

752 HP

Operating Weight

165,089 lb
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    SPECIFICATIONS

    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.

      FULL SPECIFICATIONS

      Axles

      Front

      Fixed

      Rear

      Trunnion

      Oscillation Angle

      8.5 °

      Blade

      Blade Capacity Range

      15,9-30,7 m3 (20,7-40,2 yd.3)

      Brakes

      Brakes

      Meets ISO 3540:2011

      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.

      Dimensions (Approximate)

      Ground Clearance

      2 ft

      Centerline of Front Axle to Hitch

      7.5 ft

      Height - Top of Exhaust Pipe

      16.6 ft

      Length - With Blade on Ground

      36.5 ft

      Wheel Base

      15.1 ft

      Centerline of Rear Axle to Edge of Bumper

      12.5 ft

      Height - Top of ROPS

      17.2 ft

      Height - Top of Hood

      12.7 ft

      Engine

      Engine Model

      C27 Cat®

      Gross Power

      752 HP

      Bore

      5.4 in

      Stroke

      6 in

      Displacement

      1,649.5 in³

      Torque Rise

      18 %

      Rated Speed

      1,800 r/min

      Net Power - SAE J1349

      699 HP

      Gross Power - ISO 14396

      752 HP

      Net Power - SAE J1349 - High Ambient

      648 HP

      Peak Torque - Speed

      2,624 lb/ft

      Emissions

      U.S. EPA Tier 4 Final or Tier 2 Equivalent

      Net Power - SAE J1349 - Standard Ambient

      699 HP

      Gross Power - SAE J1995

      766 HP

      Hydraulic System - Lift/Tilt

      Relief Valve Setting - Bulldozer (Large Pump)

      2,700 psi

      Output at 2,000 rpm and 6900 kPa (1,000 psi)

      82 gal/min

      Relief Valve Setting - Tilt Cylinders (Small Pump)

      2,920 psi

      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)

      Hydraulic System - Steering

      Total Steering Angle

      35 °

      Minimum Turning Radius - Over Blade

      34 ft

      Steering System - Pump

      Piston, variable displacement

      Steering System - Circuit

      Pilot, load sensing

      Relief Valve Setting

      4,500 psi

      Maximum Flow

      94.3 gal/min

      Service Refill Capacities

      Fuel Tank - Standard

      286.6 gal (US)

      Cooling System

      54.9 gal (US)

      Crankcase

      20 gal (US)

      Transmission

      29.1 gal (US)

      Differential - Final Drives - Front

      71.6 gal (US)

      Differential - Final Drives - Rear

      68.9 gal (US)

      Hydraulic System - Steering and Braking

      34.9 gal (US)

      Hydraulic System - Implement and Hydraulic Fan

      68.9 gal (US)

      Sound Performance - Standard

      Operator Sound Level (ISO 6396:2008)

      69 dB(A)

      Machine Sound Level (ISO 6395:2008)

      115 dB(A)

      Sound Performance - Suppression

      Operator Sound Level (ISO 6396:2008)

      69 dB(A)

      Machine Sound Level (ISO 6395:2008)

      113 dB(A)

      Transmission

      Converter Drive - Forward 1

      4.5 mile/h

      Converter Drive - Forward 2

      8.3 mile/h

      Converter Drive - Forward 3

      14.2 mile/h

      Converter Drive - Reverse 1

      4.9 mile/h

      Converter Drive - Reverse 2

      9.1 mile/h

      Converter Drive - Reverse 3

      15.5 mile/h

      Direct Drive - Forward 2

      8.5 mile/h

      Direct Drive - Forward 3

      15.2 mile/h

      Direct Drive - Reverse 1

      5.4 mile/h

      Direct Drive - Reverse 2

      9.6 mile/h

      Direct Drive - Reverse 3

      16.4 mile/h

      Direct Drive - Forward 1

      Lock-up disabled

      Transmission Type

      Cat Planetary Power Shift

      Weights

      Operating Weight

      165,089 lb
      STANDARD EQUIPMENT

      • NOTE
        • Standard and optional equipment may vary. Consult your Cat dealer for details.
      • OPERATOR ENVIRONMENT
        • Air conditioner and heater with automatic temperature control
        • Cab, sound-suppressed pressurized, protective structure (ROPS/FOPS), radio ready for (entertainment) includes antenna, speakers and converter (12V, 10-15 amp)
        • 12V power port for mobile phone or laptop connection
        • Camera, rear vision
        • Cigar lighter and ashtray
        • Coat hook
        • Electro-hydraulic blade controls (seat mounted)
        • Flip-up armrest
        • Heater and defroster
        • Horn, electric
        • Implement hydraulic lockout
        • Instrumentation, gauges: - Engine coolant temperature - Fuel level - Ground speed - Gear - Hydraulic oil temperature - Speedometer/tachometer - Torque converter temperature
        • Instrumentation, warning indicators: - Action alert system, three category - Automatic transmission model enable status - Brake malfunction - Bucket float status - Delayed engine shutdown status - Engine idle shutdown status - Engine malfunction - Fuel economy mode enable status - Hydraulic lockout - Lockup clutch enable status - Low fuel level - Parking brake status - Rimpull control enable status - Seatbelt warning - Secondary steering (if equipped) - Throttle lock status - Transmission gear
        • Keypad, control with indicator lights: - Auto trans mode speed range - Auto/manual transmission mode - Lockup clutch - Reduced rimpull - Throttle lock
        • Light, dome (cab)
        • Lunchbox and beverage holders
        • Mirrors, rearview (externally mounted)
        • Seat, Cat comfort (cloth) air suspension
        • Seat belt, retractable, 76 mm (3 in) wide
        • STIC control system with steering lock
        • Tinted glass
        • Trainer seat with lap belt
        • Vital Information Management System (VIMS) 3G with graphical information display: external data port, customizable operator profiles
        • Wet-arm wipers/washers (front, rear and corner) intermittent front wiper
      • POWER TRAIN
        • Brakes, full hydraulic, enclosed, oil-disc
        • Axle-shaft oil-disc service brake
        • Electro hydraulic parking brake
        • Case drain filters
        • Cat clean emission module (Tier 4 only)
        • Demand fan
        • Engine Cat C27
        • Fuel priming pump (electric)
        • Ground level engine shutoff, bumper
        • Mufflers (under hood) (Tier 2 only)
        • Precleaner, engine air intake
        • Radiator, Aluminum Modular (AMR)
        • Separated cooling system
        • Starting aid, (ether) manual override
        • Throttle Lock
        • Torque Converter, Impeller Clutch with lock-up clutch feature and rimpull control system
        • Transmission, 534 mm (21 in) planetary power shift (electronic) (3F/3R)
      • ELECTRICAL
        • Alarm, back-up
        • Alternator, 150 amp
        • Batteries, maintenance free (2 - 1,400 CCA)
        • Converter, 10/15 amp, 24V to 12V
        • Deutsch component connectors
        • Electrical system, 24V
        • Electronic transmission control
        • Lighting system, halogen (front and rear) lighting, access stairway, engine compartment
        • Starter, electric
        • Starter lockout in bumper
        • Starting receptacle for emergency start
        • Transmission lockout in bumper
      • OTHER
        • Axle temperature sensor
        • Battery disconnect and jump start receptacle, bumper
        • Coupling, Caterpillar O-ring face seals
        • Economy mode with on demand throttle
        • Emergency platform egress
        • Engine, crankcase, 500 hour interval with CH4
        • Engine idle management features: - Auto idle kickdown - Delayed engine shutdown - Engine idle shutdown
        • Fenders, steel (front)
        • Guards, crankcase and power train
        • Grouped/labeled lube points
        • Hitch, drawbar with pin
        • Hoses, Cat XT
        • Oil sampling valves
        • Positive flow control hydraulic system
        • Product Link™
        • Sight Gauges: hydraulic tanks, steering/fan and implement/brake, and transmission
        • Stairway, left and right rear access
        • Steering, load sensing
        • Steering, secondary
        • Toe kicks
        • Vandalism protection caplocks
        • Venturi stack
        • Premixed 50% concentration of extended life coolant with freeze protection to -34° C (-29° F)

      OPTIONAL EQUIPMENT

      • NOTE
        • Standard and optional equipment may vary. Consult your Cat dealer for details.
      • POWER TRAIN
        • 50° C (-58° F) antifreeze
        • Engine oil change system, high speed, Wiggins
        • Engine block heater 120V or 240V
        • High ambient cooling - software
      • BLADES
        • Semi-U - 17.8 m3 (23.3 yd3)
        • HD Semi-U - 16.1 m3 (21.1 yd3)
        • Coal - 30.7 m3 (40.2 yd3)
      • OPERATOR ENVIRONMENT
        • Cab precleaner
        • AM/FM/CD/MP3 radio
        • Satellite Sirius radio with Bluetooth
        • LED warning strobe
        • CB radio ready
        • Window sun shade
      • MISCELLANEOUS ATTACHMENTS
        • Front and rear roading fenders
        • Fast fill fuel system (Shaw-Aero)
        • Axle oscillation stop
        • Paint, black blade rear

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