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844K Wheel Dozer

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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SPECIFICATION SUMMARY
  • Engine Model Cat® C27 ACERT™
  • Gross Power 752.0 hp
  • Operating Weight 165089.0 lb
  • Bore 5.4 in

PRICE (USD)
Call 800-637-5000 for rate information

Engine

  • Engine Model
    Cat® C27 ACERT™
  • Gross Power
    752.0 hp
  • Bore
    5.4 in
  • Stroke
    6.0 in
  • Displacement
    1649.5 in3
  • Torque Rise
    18.0 %
  • Emissions
    U.S. EPA Tier 4 Final or Tier 2 Equivalent
  • Gross Power - ISO 14396
    752.0 hp
  • Gross Power - SAE J1995
    766.0 hp
  • Net Power - SAE J1349
    699.0 hp
  • Net Power - SAE J1349 (High Ambient)
    648.0 hp
  • Net Power - SAE J1349 (Standard Ambient)
    699.0 hp
  • Peak Torque @ (speed)
    2624.0 lb ft
  • Rated Speed
    1800.0 RPM
  • Engine Model
    C27 Cat®
  • Gross Power
    752 HP
  • Bore
    5.4 in
  • Stroke
    6 in
  • Displacement
    1649.5 in³
  • Torque Rise
    18 %
  • Emissions
    U.S. EPA Tier 4 Final or Tier 2 Equivalent
  • Gross Power - ISO 14396
    752 HP
  • Gross Power - SAE J1995
    766 HP
  • Net Power - SAE J1349
    699 HP
  • Net Power - SAE J1349 - High Ambient
    648 HP
  • Net Power - SAE J1349 - Standard Ambient
    699 HP
  • Peak Torque - Speed
    2624 lb/ft
  • Rated Speed
    1800 r/min

Weights

  • Operating Weight
    165089.0 lb
  • Operating Weight
    165089 lb

Transmission

  • Converter Drive - Forward 1
    4.5 mph
  • Converter Drive - Forward 2
    8.3 mph
  • Converter Drive - Forward 3
    14.2 mph
  • Converter Drive - Reverse 1
    4.9 mph
  • Converter Drive - Reverse 2
    9.1 mph
  • Converter Drive - Reverse 3
    15.5 mph
  • Direct Drive - Forward 2
    8.5 mph
  • Direct Drive - Forward 3
    15.2 mph
  • Direct Drive - Reverse 1
    5.4 mph
  • Direct Drive - Reverse 2
    9.6 mph
  • Direct Drive - Reverse 3
    16.4 mph
  • Direct Drive - Forward 1
    Lock-up disabled
  • 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 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

Service Refill Capacities

  • Fuel Tank - Standard
    286.6 gal
  • Cooling System
    54.9 gal
  • Crankcase
    20.0 gal
  • Transmission
    29.1 gal
  • Differentials and Final Drives - Front
    71.6 gal
  • Differentials and Final Drives - Rear
    68.9 gal
  • Hydraulic System - Implement and Hydraulic Fan
    68.9 gal (US)
  • Hydraulic System - Steering and Braking
    34.9 gal (US)
  • 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)

Axles

  • Front
    Fixed
  • Rear
    Trunnion
  • Oscillation Angle
    8.5 Degrees
  • Front
    Fixed
  • Rear
    Trunnion
  • Oscillation Angle
    8.5 °

Brakes

  • Brakes
    Meets ISO 3540:2011
  • Brakes
    Meets ISO 3540:2011

Cab

  • Air Conditioning
    Standard air conditioning system contains environmentally friendly R134a refrigerant
  • 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.
  • 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
  • Air Conditioning
    Standard air conditioning system contains environmentally friendly R134a refrigerant
  • 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.

Hydraulic System - Lift/Tilt

  • Cylinder, 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)
  • Output at 2,000 rpm and 6900 kPa (1,000 psi)
    82 gal/min
  • Relief Valve Setting - Bulldozer (Large Pump)
    2700 psi
  • Relief Valve Setting - Tilt Cylinders (Small Pump)
    2920 psi
  • Cylinders, Double Acting - Lift, Bore and Stroke
    133 mm × 1535 mm (5.25 in × 60.4 in)

Sound Performance - Suppression

  • Machine Sound Level (ISO 6395:2008)
    113.0 dB(A)
  • Operator Sound Level (ISO 6396:2008)
    69.0 dB(A)
  • Machine Sound Level (ISO 6395:2008)
    113 dB(A)
  • Operator Sound Level (ISO 6396:2008)
    69 dB(A)

Hydraulic System - Steering

  • Maximum Flow
    94.3 gal/min
  • Steering System - Circuit
    Pilot, load sensing
  • Steering System - Pump
    Piston, variable displacement
  • Total Steering Angle
    35.0 Degrees
  • Minimum Turning Radius - Over Blade
    34 ft
  • Relief Valve Setting
    4500 psi
  • Maximum Flow
    94.3 gal/min
  • Steering System - Circuit
    Pilot, load sensing
  • Steering System - Pump
    Piston, variable displacement
  • Total Steering Angle
    35 °

Dimensions (Approximate)

  • Center Line of Front Axle to Hitch
    7.5 ft
  • Center Line of Rear Axle to Edge of Bumper
    12.5 ft
  • Ground Clearance
    2.0 ft
  • Height to Top of Exhaust Pipe
    16.6 ft
  • Height to Top of Hood
    12.7 ft
  • Height to Top of ROPS
    17.2 ft
  • Length with Blade on Ground
    36.5 ft
  • Wheelbase
    15.1 ft
  • Centerline of Front Axle to Hitch
    7.5 ft
  • Centerline of Rear Axle to Edge of Bumper
    12.5 ft
  • Ground Clearance
    2 ft
  • Height - Top of Exhaust Pipe
    16.6 ft
  • Height - Top of Hood
    12.7 ft
  • Height - Top of ROPS
    17.2 ft
  • Length - With Blade on Ground
    36.5 ft
  • Wheel Base
    15.1 ft

Sound Performance - Standard

  • Machine Sound Level (ISO 6395:2008)
    115.0 dB(A)
  • Operator Sound Level (ISO 6396:2008)
    69.0 dB(A)
  • Machine Sound Level (ISO 6395:2008)
    115 dB(A)
  • Operator Sound Level (ISO 6396:2008)
    69 dB(A)

Blade

  • Blade Capacity Range
    15,9-30,7 m3 (20,7-40,2 yd.3)

Long Term Value and Durability

Built to Perform

Performance and Productivity

Work In Comfort

Integrated Cat® Technologies

Technology that Gets Work Done

Safety First

Save on Service and Maintenance

Top-Tier Service and Support

Reduce Environmental Impact

Purpose-Built Cat Attachments

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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