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Caterpillar

844 Wheel Dozer

Engine Model

C27 Cat®

Rated Speed

1800 r/min

Gross Power - ISO 14396

752 HP

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 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.

Photos

Videos

  • Meet the Pros: Cat® Wheel Dozers

360° View

Exterior

360° Exterior view. Double click on the image to zoom in on any area of the product.

Interior

360° interior view. Double click on the image to zoom in on any area of the product.

Specifications

  • Engine
    Spec Value
    Engine Model C27 Cat®
    Rated Speed 1800 r/min
    Gross Power - ISO 14396 752 HP
    Gross Power - SAE J1995 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 1649.5 in³
    Peak Torque - Speed 2624 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
  • Operating Specifications
    Spec Value
    Operating Weight 165089 lb
    Blade Capacities 15.9 - 30.7 m3 (20.7 - 40.2 yd3)
  • Transmission
    Spec Value
    Transmission Type Cat Planetary Power Shift
    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 1 Lock-up disabled
    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
  • Hydraulic System - Lift/Tilt
    Spec Value
    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) 2700 psi
    Relief Valve Setting - Tilt Cylinders (Small Pump) 2920 psi
  • Hydraulic System - Steering
    Spec Value
    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 4500 psi
  • Service Refill Capacities
    Spec Value
    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)
  • Air Conditioning System
    Spec Value
    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
    Spec Value
    Front Fixed
    Rear Trunnion
    Oscillation Angle 8.5 °
  • Brakes
    Spec Value
    Brakes Meets ISO 3540:2011
  • Sound Performance - Standard
    Spec Value
    Operator Sound Level (ISO 6396:2008) 69 dB(A)
    Machine Sound Level (ISO 6395:2008) 115 dB(A)
  • Sound Performance - Suppression
    Spec Value
    Operator Sound Level (ISO 6396:2008) 69 dB(A)
    Machine Sound Level (ISO 6395:2008) 113 dB(A)
  • Cab
    Spec Value
    ROPS/FOPS ISO 3471:2008 and ISO 3449:2005 Level II Standards
  • Dimensions (Approximate)
    Spec Value
    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

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