844

Rated Speed
1800 r/min
Gross Power - ISO 14396
752 HP / 561 kW
Gross Power - SAE J1995
766 HP / 571 kW

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.

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844 Wheel Dozer - Key Features (Global) 844 Wheel Dozer - Technical Specifications (Global)
Engine
Engine Model C27 Cat®
Rated Speed 1800 r/min
Gross Power - ISO 14396 752 HP / 561 kW
Gross Power - SAE J1995 766 HP / 571 kW
Net Power - SAE J1349 - Standard Ambient 699 HP / 521 kW
Net Power - SAE J1349 - High Ambient 648 HP / 483 kW
Bore 5.4 in / 137.2 mm
Stroke 6 in / 152.4 mm
Displacement 1649.5 in³ / 27.03 l
Peak Torque - Speed 2624 lb/ft / 3557 N·m
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
Operating Weight 165089 lb / 74883 kg
Blade Capacities 15.9 - 30.7 m3 (20.7 - 40.2 yd3)
Transmission
Transmission Type Cat Planetary Power Shift
Converter Drive - Forward 1 4.5 mile/h / 7.3 km/h
Converter Drive - Forward 2 8.3 mile/h / 13.3 km/h
Converter Drive - Forward 3 14.2 mile/h / 22.9 km/h
Converter Drive - Reverse 1 4.9 mile/h / 7.9 km/h
Converter Drive - Reverse 2 9.1 mile/h / 14.7 km/h
Converter Drive - Reverse 3 15.5 mile/h / 24.9 km/h
Direct Drive - Forward 1 Lock-up disabled
Direct Drive - Forward 2 8.5 mile/h / 13.7 km/h
Direct Drive - Forward 3 15.2 mile/h / 24.5 km/h
Direct Drive - Reverse 1 5.4 mile/h / 8.7 km/h
Direct Drive - Reverse 2 9.6 mile/h / 15.4 km/h
Direct Drive - Reverse 3 16.4 mile/h / 26.4 km/h
Hydraulic System - Lift/Tilt
Output at 2,000 rpm and 6900 kPa (1,000 psi) 82 gal/min / 311 l/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 / 18650 kPa
Relief Valve Setting - Tilt Cylinders (Small Pump) 2920 psi / 20150 kPa
Hydraulic System - Steering
Steering System - Circuit Pilot, load sensing
Steering System - Pump Piston, variable displacement
Minimum Turning Radius - Over Blade 34 ft / 10369 mm
Total Steering Angle 35 °
Maximum Flow 94.3 gal/min / 357 l/min
Relief Valve Setting 4500 psi / 31000 kPa
Service Refill Capacities
Fuel Tank - Standard 286.6 gal (US) / 1085 l
Cooling System 54.9 gal (US) / 208 l
Crankcase 20 gal (US) / 76 l
Transmission 29.1 gal (US) / 110 l
Differential - Final Drives - Front 71.6 gal (US) / 271 l
Differential - Final Drives - Rear 68.9 gal (US) / 261 l
Hydraulic System - Implement and Hydraulic Fan 68.9 gal (US) / 261 l
Hydraulic System - Steering and Braking 34.9 gal (US) / 132 l
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
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)
Cab
ROPS/FOPS ISO 3471:2008 and ISO 3449:2005 Level II Standards
Dimensions (Approximate)
Height - Top of ROPS 17.2 ft / 5240 mm
Height - Top of Exhaust Pipe 16.6 ft / 5049 mm
Height - Top of Hood 12.7 ft / 3862 mm
Ground Clearance 2 ft / 596 mm
Centerline of Front Axle to Hitch 7.5 ft / 2300 mm
Centerline of Rear Axle to Edge of Bumper 12.5 ft / 3795 mm
Wheel Base 15.1 ft / 4600 mm
Length - With Blade on Ground 36.5 ft / 11120 mm

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

Equipment Management

Cat® Equipment Management gives you access to the data you need to keep your equipment on the job site and earning money. You can track equipment location and hours, monitor machine use and health, then take informed action that will keep your operation running smoothly, efficiently and profitably.

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