844

Wheel Dozers 844

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Key Specs

Engine Model
C27 Cat®
C27 Cat®
Rated Speed
1800 r/min
1800 r/min
Gross Power - ISO 14396
752 hp
561 kW

Overview

Mobile. Agile. Versatile.

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.

Benefits

IMPROVED EFFICIENCY

Lock-up torque converter, combined with an on-demand cooling fan and advanced engine idle management, delivers a more smooth shift

ENHANCED MAINTENANCE

Service access is conveniently located, helping to reduce maintenance time

ADDITIONAL SAFETY

Grouped, ground level engine and machine controls allow for safe and easy daily maintenance

UP TO 18% LESS CO2 EMISSIONS

The 844 emits up to 18% less CO2 than the previous 844H.

Product Specifications for 844

Engine Model C27 Cat® C27 Cat®
Rated Speed 1800 r/min 1800 r/min
Gross Power - ISO 14396 752 hp 561 kW
Gross Power - SAE J1995:2014 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 % 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 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 Weight 165089 lb 74883 kg
Blade Capacities 15.9 - 30.7 m3 (20.7 - 40.2 yd3) 15.9 - 30.7 m3 (20.7 - 40.2 yd3)
Transmission Type Cat Planetary Power Shift 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 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
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) 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) 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
Steering System - Circuit Pilot, load sensing Pilot, load sensing
Steering System - Pump Piston, variable displacement Piston, variable displacement
Minimum Turning Radius - Over Blade 34 ft 10369 mm
Total Steering Angle 35 ° 35 °
Maximum Flow 94.3 gal/min 357 l/min
Relief Valve Setting 4500 psi 31000 kPa
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 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. 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.
Front Fixed Fixed
Rear Trunnion Trunnion
Oscillation Angle 8.5 ° 8.5 °
Brakes Meets ISO 3540:2011 Meets ISO 3540:2011
Operator Sound Level (ISO 6396:2008) 69 dB(A) 69 dB(A)
Machine Sound Level (ISO 6395:2008) 115 dB(A) 115 dB(A)
Operator Sound Level (ISO 6396:2008) 69 dB(A) 69 dB(A)
Machine Sound Level (ISO 6395:2008) 113 dB(A) 113 dB(A)
ROPS/FOPS ISO 3471:2008 and ISO 3449:2005 Level II Standards ISO 3471:2008 and ISO 3449:2005 Level II Standards
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

844 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)

844 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

Compatible Technology and Services

Leverage Caterpillar connected data and security principles to improve efficiencies, increase productivity and make your business more profitable.

  • Cat Inspect

    Cat® Inspect allows you to access your equipment data on your mobile device. This easy-to-use app lets you capture inspection data and integrates with your other Cat data systems, so you can keep a close eye on your fleet. More than one million inspections are completed each year, providing convenience and accountability to equipment owners.

  • Cat Product Link

    Cat® Product Link™ wirelessly connects you to your equipment giving you valuable insight into how your machine or fleet is performing. Information such as location, hours, fuel usage, productivity, idle time, and diagnostic codes are made available through online web applications so that you can make timely, fact-based decisions to maximize efficiency, improve productivity, and lower the cost of owning and operating your fleet. Available with satellite or cellular connectivity.

  • Cat Remote Flash

    Remote Flash sends an alert from your Cat dealer, prompting you to update the software on your machine. To minimize downtime, updates can be deployed while on the jobsite without having to wait for a dealer technician to arrive. Remote flash decreases maintenance time and keeps your asset running with maximum efficiency.

  • VisionLink®

    VisionLink® is a cloud-based software application that takes the guesswork out of fleet management with key insights to maximize performance - regardless of fleet size or equipment manufacturer. Receive equipment data seamlessly to your desktop or mobile device, all from a convenient centralized solution to make informed decisions at every turn.

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Cat® Inspect allows you to access your equipment data on your mobile device. This easy-to-use app lets you capture inspection data and integrates with your other Cat data systems, so you can keep a close eye on your fleet. More than one million inspections are completed each year, providing convenience and accountability to equipment owners.

Explore Technology

Cat® Product Link™ wirelessly connects you to your equipment giving you valuable insight into how your machine or fleet is performing. Information such as location, hours, fuel usage, productivity, idle time, and diagnostic codes are made available through online web applications so that you can make timely, fact-based decisions to maximize efficiency, improve productivity, and lower the cost of owning and operating your fleet. Available with satellite or cellular connectivity.

Explore Technology

Remote Flash sends an alert from your Cat dealer, prompting you to update the software on your machine. To minimize downtime, updates can be deployed while on the jobsite without having to wait for a dealer technician to arrive. Remote flash decreases maintenance time and keeps your asset running with maximum efficiency.

Explore Technology

VisionLink® is a cloud-based software application that takes the guesswork out of fleet management with key insights to maximize performance - regardless of fleet size or equipment manufacturer. Receive equipment data seamlessly to your desktop or mobile device, all from a convenient centralized solution to make informed decisions at every turn.

Explore Technology

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844 Wheel Dozer

844 Wheel Dozer

844 Wheel Dozer

844 Wheel Dozer

844 Wheel Dozer

844 Wheel Dozer

844 Wheel Dozer
844 Wheel Dozer
844 Wheel Dozer
844 Wheel Dozer
844 Wheel Dozer
844 Wheel Dozer

Meet the Pros: Cat® Wheel Dozers

Meet the Pros: Cat® Wheel Dozers

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