New | 844K Wheel Dozer

Cat Large 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.

Engine
Engine ModelCat® C27 ACERT™
Gross Power752 mm H2O
Bore5.4 in
Stroke6 in
Displacement1649.5 in³
Torque Rise18 %
EmissionsU.S. EPA Tier 4 Final or Tier 2 Equivalent
Gross Power - ISO 14396752 mm H2O
Gross Power - SAE J1995766 mm H2O
Net Power - SAE J1349699 mm H2O
Net Power - SAE J1349 - High Ambient648 mm H2O
Net Power - SAE J1349 - Standard Ambient699 mm H2O
Peak Torque - Speed2624 lb/ft
Rated Speed1800 r/min
Weights
Operating Weight165089 lb
Transmission
Converter Drive - Forward 14.5 mile/h
Converter Drive - Forward 28.3 mile/h
Converter Drive - Forward 314.2 mile/h
Converter Drive - Reverse 14.9 mile/h
Converter Drive - Reverse 29.1 mile/h
Converter Drive - Reverse 315.5 mile/h
Direct Drive - Forward 28.5 mile/h
Direct Drive - Forward 315.2 mile/h
Direct Drive - Reverse 15.4 mile/h
Direct Drive - Reverse 29.6 mile/h
Direct Drive - Reverse 316.4 mile/h
Direct Drive - Forward 1Lock-up disabled
Transmission TypeCat Planetary Power Shift
Service Refill Capacities
Fuel Tank - Standard286.6 gal (US)
Cooling System54.9 gal (US)
Crankcase20 gal (US)
Transmission29.1 gal (US)
Differential - Final Drives - Front71.6 gal (US)
Differential - Final Drives - Rear68.9 gal (US)
Hydraulic System - Implement and Hydraulic Fan68.9 gal (US)
Hydraulic System - Steering and Braking34.9 gal (US)
Cab
Air ConditioningStandard 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
FOPSFOPS meets SAE J231 JAN81 and ISO 3449:1992 Level II criteria.
ROPSROPS meets SAE J11040 APR88, ISO 3471:2008 and ISO 3471:1994 criteria.
Brakes
BrakesMeets ISO 3540:2011
Axles
FrontFixed
RearTrunnion
Oscillation Angle8.5 °
Blade
Blade Capacity Range15.9-30.7 m3 (20.7-40.2 yd3)
Sound Performance - Standard
Machine Sound Level (ISO 6395:2008)115 dB(A)
Operator Sound Level - ISO 6396:200869 dB(A)
Sound Performance - Suppression
Machine Sound Level (ISO 6395:2008)113 dB(A)
Operator Sound Level - ISO 6396:200869 dB(A)
Hydraulic System - Lift/Tilt
Cylinder, Double Acting - Tilt and Tip, Bore and Stroke210 mm × 188 mm (8.25 in × 7.4 in)
Cylinders, Double Acting - Lift, Bore and Stroke133 mm × 1535 mm (5.25 in × 60.4 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
Hydraulic System - Steering
Maximum Flow94.3 gal/min
Minimum Turning Radius - Over Blade34 ft
Relief Valve Setting4500 psi
Steering System - CircuitPilot, load sensing
Steering System - PumpPiston, variable displacement
Total Steering Angle35 °
Dimensions (Approximate)
Centerline of Front Axle to Hitch7.5 ft
Centerline of Rear Axle to Edge of Bumper12.5 ft
Ground Clearance2 ft
Height - Top of Exhaust Pipe16.6 ft
Height - Top of Hood12.7 ft
Height - Top of ROPS17.2 ft
Length - With Blade on Ground36.5 ft
Wheel Base15.1 ft
  • Structures
  • Structures
  • Structures
  • Power Train
  • Power Train
  • Power Train
  • Power Train
  • Hydraulics
  • Hydraulics
  • Hydraulics
  • Hydraulics
  • Operator Station
  • Operator Station
  • Operator Station
  • Operator Station
  • Operator Station
  • Technology Solutions
  • Technology Solutions
  • Technology Solutions
  • Cat Minestar System
  • Cat Minestar System
  • Cat Minestar System
  • Cat Minestar System
  • Cat Minestar System
  • Safety
  • Safety
  • Safety
  • Safety
  • Safety
  • Serviceability
  • Customer Support
  • Sustainability
  • Cat Blades
  • Cat Blades
  • Cat Blades
  • Cat Blades

Standard Equipment

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 ec
  • 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 ACERT
  • 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

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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