844

Wheel Dozers 844

Request A Price Find Dealer

Key Specs

Engine Model
Cat® C27
Cat® C27
Operating Weight
165089 lb
74883 kg
Net Power - SAE J1349:2011 - Standard Ambient
732 hp
546 kW

Overview

Mobile. Agile. Versatile.

Maximize productivity in mining applications with the Cat® 844 Wheel Dozer, designed with efficiency in mind. Enhanced maintenance capabilities and simplified serviceability make for a long lifecycle, low owning and operating costs, and more uptime. Move more material with a machine built for the toughest conditions.

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

Product Specifications for 844

Engine Model Cat® C27 Cat® C27
Net Power - SAE J1349:2011 - Standard Ambient 732 hp 546 kW
Rated Speed 1800 r/min 1800 r/min
Emissions Option 1 - U.S. EPA Tier 4 Final / EU Stage V Option 1 - U.S. EPA Tier 4 Final / EU Stage V
Engine Power - ISO 14396:2002 786 hp 586 kW
Gross Power - SAE J1995:2014 801 hp 597 kW
Net Power - SAE J1349:2011 - High Ambient 681 hp 508 kW
Emissions Option 2 - China Nonroad Stage III emissions standards, equivalent to U.S. EPA Tier 2 Option 2 - China Nonroad Stage III emissions standards, equivalent to U.S. EPA Tier 2
Engine Power - ISO 14396: 2002 752 hp 561 kW
Gross Power - SAE J1995:2014 766 hp 571 kW
Net Power - SAE J1349:2011 - Standard Ambient 699 hp 521 kW
Net Power - SAE J1349:2011 - 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 %
Note Net power advertised is the power available at the flywheel when the engine is equipped with fan at minimum speed, air intake system, exhaust system, and alternator. Net power advertised is the power available at the flywheel when the engine is equipped with fan at minimum speed, air intake system, exhaust system, and alternator.
Operating Weight 165089 lb 74883 kg
Blade Capacity Range 20.8 yd³ 15.9 m³
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
Note Travel speeds based on 45/65-45 L-5 46 ply tires. Travel speeds based on 45/65-45 L-5 46 ply tires.
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 or R1234yf. See the label or instruction manual for identification of the gas. - If equipped with R134a (Global Warming Potential = 1430), the system contains 1.8 kg (3.9 lb) of refrigerant, which has a CO2 equivalent of 2.574 metric tonnes (2.837 tons). The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a or R1234yf. See the label or instruction manual for identification of the gas. - If equipped with R134a (Global Warming Potential = 1430), the system contains 1.8 kg (3.9 lb) of refrigerant, which has a CO2 equivalent of 2.574 metric tonnes (2.837 tons).
Front Fixed Fixed
Rear Trunnion Trunnion
Oscillation Angle 8.5 ° 8.5 °
Brakes Meets ISO 3540:2011 Meets ISO 3540:2011
Operator Sound Pressure Level (ISO 6396:2008) 72 dB(A) 72 dB(A)
Machine Sound Power Level (ISO 6395:2008) 116 dB(A) 116 dB(A)
Operator Sound Pressure Level (ISO 6396:2008)* 72 dB(A) 72 dB(A)
Machine Sound Power Level (ISO 6395:2008)* 114 dB(A) 114 dB(A)
Note (1) *Sound suppression equipped *Sound suppression equipped
Note (2) The machine sound power level was measured according to ISO 6395:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed. The machine sound power level was measured according to ISO 6395:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed.
Note (3) The operator sound pressure level was measured according to ISO 6396:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed. The operator sound pressure level was measured according to ISO 6396:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed.
Note (4) Hearing protection may be needed when the machine is operated with a cab that is not properly maintained or when the doors or windows are open for extended periods or in a noisy environment. Hearing protection may be needed when the machine is operated with a cab that is not properly maintained or when the doors or windows are open for extended periods or in a noisy environment.
Operator Sound Pressure Level (ISO 6396:2008) 72 dB(A) 72 dB(A)
Machine Sound Power Level (ISO 6395:2008) 116 dB(A) 116 dB(A)
Operator Sound Pressure Level (ISO 6396:2008)* 72 dB(A) 72 dB(A)
Machine Sound Power Level (ISO 6395:2008)* 114 dB(A) 114 dB(A)
Note (1) *Sound suppression equipped *Sound suppression equipped
Note (2) The machine sound power level was measured according to ISO 6395:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed. The machine sound power level was measured according to ISO 6395:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed.
Note (3) The operator sound pressure level was measured according to ISO 6396:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed. The operator sound pressure level was measured according to ISO 6396:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed.
Note (4) Hearing protection may be needed when the machine is operated with a cab that is not properly maintained or when the doors or windows are open for extended periods or in a noisy environment. Hearing protection may be needed when the machine is operated with a cab that is not properly maintained or when the doors or windows are open for extended periods or in a noisy environment.
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.

ELECTRICAL AND LIGHTING

  • Alternator, 150 amp
  • Batteries, maintenance free (4 - 1,400 CCA)
  • Battery disconnect and jump start receptacle, bumper
  • Deutsch terminal connectors
  • Electrical system, 24V
  • Electronic transmission control
  • Lighting system, halogen (front and rear) lighting, access stairway, engine compartment
  • Starter lockout in bumper
  • Starting and charging system, 24V
  • Transmission lockout in bumper

POWERTRAIN

  • Brakes, oil cooled, multi-disc, service/secondary
  • Driveline parking brake
  • Engine Cat C27
  • Fuel priming pump (electric)
  • Ground level engine shutdown switch
  • Precleaner, engine air intake (above hood)
  • Radiator, Aluminum Modular (AMR)
  • Starting aid, (ether) automatic
  • Throttle Lock electronic
  • Torque Converter, Impeller clutch with lock-up clutch (ICTC) and rimpull control system
  • Transmission, 534 mm (21 in) planetary power shift (electronic) (3F/3R)

OPERATOR ENVIRONMENT

  • Advisor display, displays real time operating information, performs calibrations and customizes operator setting
  • Air conditioner and heater with automatic temperature control
  • Air precleaner, powered
  • Cab, sound-suppressed pressurized, separate external rolloever protective structure/falling objects protective structure (ROPS/FOPS)
  • Cigar lighter and ashtray
  • Coat hook
  • Converter (12V, 10/15 amp) and power port
  • Electro-hydraulic blade controls (joystick)
  • Heater and defroster
  • Horn, electric
  • Instrumentation, gauges: - engine coolant temperature, fuel level, hydraulic oil temperature, powertrain oil temperature, tachometer
  • 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
  • Light, dome (cab)
  • Lunchbox and beverage holders
  • 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
  • Radio, AM/FM with Bluetooth®, USB Port, 3.5 mm AUX input
  • Tinted glass
  • Wet-arm wipers/washers (front, rear and corner) intermittent front wiper

SAFETY

  • Alarm, back-up
  • Camera, rear vision
  • Emergency platform exit
  • Implement lockout switch
  • Mirrors, rearview (externally mounted)
  • Seat belt, retractable, 76 mm (3 in) wide
  • Stairway, left and right rear access
  • Steering and transmission lock lever, cab
  • Steering, secondary
  • Seat, trainer with lap belt, 76 mm (3in) wide
  • Toe kicks

SERVICE

  • Axle ecology drains
  • Case drain filters
  • Coupling, Caterpillar O-ring face seals
  • Engine, crankcase, 500 hour interval with CH4
  • Front walkway around cab
  • Guards, crankcase and powertrain
  • Grouped/labeled lube points
  • Battery disconnect and jump start receptacle, bumper
  • Hitch, drawbar with pin
  • Hoses, Cat XT™
  • Oil sampling valves
  • Sight guages for steering, implement and transmission oil
  • Vital Information Management System (VIMS) 3G with graphical information display: external data port, customizable operator profiles

COOLING

  • Standard ambient package (recommended for site conditions that do not exceed 43°C (110°F)

COLD WEATHER

  • Heated seat

EFFICIENCY

  • Economy mode with on demand throttle
  • Positive flow control hydraulic system
  • Impeller Clutch Torque Converter (ICTC) with lock-up clutch
  • Steering, load sensing
  • Soft detent controls
  • Engine idle management features: - Auto idle kickdown - Delayed engine shutdown - Engine idle shutdown

TRAMMING

  • Front fenders

844 Optional Equipment

NOTE

  • Standard and optional equipment may vary. Consult your Cat dealer for details.

ELECTRICAL AND LIGHTING

  • Lights, LED
  • Product Link (Cellular)
  • Product Link (Satellite)

POWERTRAIN

  • Engine brake
  • No-spin rear axle
  • No-spin rear axle and oil cooler
  • Precleaner, raised

OPERATOR ENVIRONMENT

  • Radio, Sirius XM/AM/FM radio with Bluetooth technology, USB port, 3.5 mm AUX input
  • Rubber mounted cab glass
  • Window sun screen

SAFETY

  • LED warning strobe

SERVICE

  • Product Link™

BLADES

  • HD Semi-U - 16.1 m3 (21.1 yd3)
  • Paint, black blade rear

COOLING

  • High ambient cooling - software (recommended for site conditions that do not exceed 49°C [121°F]

COLD WEATHER

  • 50° C (-58° F) antifreeze
  • 120V or 240V coolant heating elements (recommended in conditions from -18°C to -30°C [0°F to -22°F]
  • -40°C (-40°F) Hydraulic Oil, Arctic

TRAMMING

  • Fender extensions, roading, front and rear

See how 844 compares against frequently compared products.

Tools And Expert Help At Every Turn

Product Brochures and More Are Ready to Download!

Media Gallery

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

360 View
360 View

Check out current offers for the 844

View More Offers