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Wheel Dozers

844 Wheel Dozer

Engine Model

C27 Cat®

Rated Speed

1,800 r/min

Gross Power - ISO 14396

752 hp
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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 844 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

      Air Conditioning System

      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.

      Axles

      Front

      Fixed

      Rear

      Trunnion

      Oscillation Angle

      8.5 °

      Brakes

      Brakes

      Meets ISO 3540:2011

      Cab

      ROPS/FOPS

      ISO 3471:2008 and ISO 3449:2005 Level II Standards

      Dimensions (Approximate)

      Height - Top of ROPS

      17.2 ft

      Height - Top of Exhaust Pipe

      16.6 ft

      Height - Top of Hood

      12.7 ft

      Ground Clearance

      2 ft

      Centerline of Front Axle to Hitch

      7.5 ft

      Centerline of Rear Axle to Edge of Bumper

      12.5 ft

      Wheel Base

      15.1 ft

      Length - With Blade on Ground

      36.5 ft

      Engine

      Engine Model

      C27 Cat®

      Rated Speed

      1,800 r/min

      Gross Power - ISO 14396

      752 hp

      Gross Power - SAE J1995:2014

      766 hp

      Net Power - SAE J1349 - Standard Ambient

      699 hp

      Net Power - SAE J1349 - High Ambient

      648 hp

      Bore

      5.4 in

      Stroke

      6 in

      Displacement

      1,649.5 in³

      Peak Torque - Speed

      2,624 lb/ft

      Torque Rise

      18 %

      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

      Hydraulic System - Lift/Tilt

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

      82 gal/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)

      2,700 psi

      Relief Valve Setting - Tilt Cylinders (Small Pump)

      2,920 psi

      Hydraulic System - Steering

      Steering System - Circuit

      Pilot, load sensing

      Steering System - Pump

      Piston, variable displacement

      Minimum Turning Radius - Over Blade

      34 ft

      Total Steering Angle

      35 °

      Maximum Flow

      94.3 gal/min

      Relief Valve Setting

      4,500 psi

      Operating Specifications

      Operating Weight

      165,089 lb

      Blade Capacities

      15.9 - 30.7 m3 (20.7 - 40.2 yd3)

      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 - Implement and Hydraulic Fan

      68.9 gal (US)

      Hydraulic System - Steering and Braking

      34.9 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

      Transmission Type

      Cat Planetary Power Shift

      Direct Drive - Forward 1

      Lock-up disabled

      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
      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
        • Cigar lighter and ashtray
        • Coat hook
        • Electro-hydraulic blade controls (joystick)
        • Flip-up armrest
        • Heater and defroster
        • Horn, electric
        • 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, premium with heated and actively cooled leather, adjustable lumbar support, air adjustable bolsters on the seat and backrest, seat cushion tilt adjustment, and adjustable-length seat cushion
        • STIC control system with steering lock
        • Tinted glass
        • Wet-arm wipers/washers (front, rear and corner) intermittent front wiper
        • Converter (12V, 10/15 amp) and power port
      • POWER TRAIN
        • Brakes, oil cooled, multi-disc, service/secondary
        • Axle-shaft oil-disc service brake
        • Electro hydraulic parking brake
        • Cat clean emission module (Tier 4 only)
        • Demand fan
        • Engine Cat C27
        • Fuel priming pump (electric)
        • Ground level engine shutoff
        • Mufflers (under hood) (Tier 2 only)
        • Precleaner, engine air intake
        • Radiator, Aluminum Modular (AMR)
        • Separated cooling system
        • Starting aid, (ether) automatic
        • Throttle Lock electronic
        • 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
        • Alternator, 150 amp
        • Batteries, maintenance free (4 - 1,400 CCA)
        • Deutsch terminal connectors
        • Electrical system, 24V
        • Electronic transmission control
        • Lighting system, halogen (front and rear) lighting, access stairway, engine compartment
        • Starting and charging system, 24V
        • Starter lockout in bumper
        • Starting receptacle for emergency start
        • Transmission lockout in bumper
      • SERVICE
        • Vital Information Management System (VIMS) 3G with graphical information display: external data port, customizable operator profiles
        • Case drain filters
        • Coupling, Caterpillar O-ring face seals
        • Guards, crankcase and power train
        • Hitch, drawbar with pin
        • Hoses, Cat XT
        • Oil sampling valves
        • Product Link™
      • SAFETY
        • Camera, rear vision
        • Implement lockout switch
        • Seat belt, retractable, 76 mm (3 in) wide
        • Trainer seat with lap belt
        • Alarm, back-up
        • Emergency platform egress
        • Stairway, left and right rear access
        • Steering, secondary
        • Toe kicks
      • TRAMMING
        • Fenders, steel (front)
      • OTHER
        • Axle temperature sensor
        • Battery disconnect and jump start receptacle, bumper
        • Economy mode with on demand throttle
        • Engine, crankcase, 500 hour interval with CH4
        • Engine idle management features: - Auto idle kickdown - Delayed engine shutdown - Engine idle shutdown
        • Grouped/labeled lube points
        • Positive flow control hydraulic system
        • Sight Gauges: hydraulic tanks, steering/fan and implement/brake, and transmission
        • Steering, load sensing
        • Vandalism protection caplocks
        • 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/MP3 radio
        • Satellite Sirius radio with Bluetooth
        • LED warning strobe
        • CB radio ready
        • Window sun shade
      • TRAMMING
        • Front and rear roading fenders
      • MISCELLANEOUS ATTACHMENTS
        • Fast fill fuel system (Shaw-Aero)
        • Axle oscillation stop
        • Paint, black blade rear
      • OTHER
        • Venturi stack

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