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.
Engine Model Cat® C27
Operating Weight 165089 lb
Net Power - SAE J1349:2011 - Standard Ambient 732 hp
Rated Speed 1800 r/min
Bore 5.4in
Displacement 1649.5in³
Emissions Option 1 - U.S. EPA Tier 4 Final / EU Stage V
Emissions Option 2 - China Nonroad Stage III emissions standards, equivalent to U.S. EPA Tier 2
Engine Model Cat® C27
Engine Power - ISO 14396: 2002 752hp
Engine Power - ISO 14396:2002 786hp
Gross Power - SAE J1995:2014 801hp
Gross Power - SAE J1995:2014 766hp
Net Power - SAE J1349:2011 - High Ambient 681hp
Net Power - SAE J1349:2011 - High Ambient 648hp
Net Power - SAE J1349:2011 - Standard Ambient 732hp
Net Power - SAE J1349:2011 - Standard Ambient 699hp
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.
Peak Torque - Speed 2624lb/ft
Rated Speed 1800r/min
Stroke 6in
Torque Rise 18%
Blade Capacity Range 20.8yd³
Operating Weight 165089lb
Converter Drive - Forward 1 4.5mile/h
Converter Drive - Forward 2 8.3mile/h
Converter Drive - Forward 3 14.2mile/h
Converter Drive - Reverse 1 4.9mile/h
Converter Drive - Reverse 2 9.1mile/h
Converter Drive - Reverse 3 15.5mile/h
Direct Drive - Forward 1 Lock-up disabled
Direct Drive - Forward 2 8.5mile/h
Direct Drive - Forward 3 15.2mile/h
Direct Drive - Reverse 1 5.4mile/h
Direct Drive - Reverse 2 9.6mile/h
Direct Drive - Reverse 3 16.4mile/h
Note Travel speeds based on 45/65-45 L-5 46 ply tires.
Transmission Type Cat Planetary Power Shift
Cylinder, Double Acting - Tilt and Tip, Bore and Stroke 210 mm × 188 mm (8.25 in × 7.4 in)
Cylinders, Double Acting - Lift, Bore and Stroke 133 mm × 1535 mm (5.25 in × 60.4 in)
Output at 2,000 rpm and 6900 kPa (1,000 psi) 82gal/min
Relief Valve Setting - Bulldozer (Large Pump) 2700psi
Relief Valve Setting - Tilt Cylinders (Small Pump) 2920psi
Maximum Flow 94.3gal/min
Minimum Turning Radius - Over Blade 34ft
Relief Valve Setting 4500psi
Steering System - Circuit Pilot, load sensing
Steering System - Pump Piston, variable displacement
Total Steering Angle 35°
Cooling System 54.9gal (US)
Crankcase 20gal (US)
Differential - Final Drives - Front 71.6gal (US)
Differential - Final Drives - Rear 68.9gal (US)
Fuel Tank - Standard 286.6gal (US)
Hydraulic System - Implement and Hydraulic Fan 68.9gal (US)
Hydraulic System - Steering and Braking 34.9gal (US)
Transmission 29.1gal (US)
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 co
Front Fixed
Oscillation Angle 8.5°
Rear Trunnion
Brakes Meets ISO 3540:2011
Machine Sound Power Level (ISO 6395:2008) 116dB(A)
Machine Sound Power Level (ISO 6395:2008)* 114dB(A)
Note (1) *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.
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.
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.
Operator Sound Pressure Level (ISO 6396:2008) 72dB(A)
Operator Sound Pressure Level (ISO 6396:2008)* 72dB(A)
Machine Sound Power Level (ISO 6395:2008) 116dB(A)
Machine Sound Power Level (ISO 6395:2008)* 114dB(A)
Note (1) *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.
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.
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.
Operator Sound Pressure Level (ISO 6396:2008) 72dB(A)
Operator Sound Pressure Level (ISO 6396:2008)* 72dB(A)
ROPS/FOPS ISO 3471:2008 and ISO 3449:2005 Level II Standards
Centerline of Front Axle to Hitch 7.5ft
Centerline of Rear Axle to Edge of Bumper 12.5ft
Ground Clearance 2ft
Height - Top of Exhaust Pipe 16.6ft
Height - Top of Hood 12.7ft
Height - Top of ROPS 17.2ft
Length - With Blade on Ground 36.5ft
Wheel Base 15.1ft
Standard and optional equipment may vary. Consult your Cat dealer for details.
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
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)
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
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
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
Standard ambient package (recommended for site conditions that do not exceed 43°C (110°F)
Heated seat
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
Front fenders
Standard and optional equipment may vary. Consult your Cat dealer for details.
Lights, LED
Product Link (Cellular)
Product Link (Satellite)
Engine brake
No-spin rear axle
No-spin rear axle and oil cooler
Precleaner, raised
Radio, Sirius XM/AM/FM radio with Bluetooth technology, USB port, 3.5 mm AUX input
Rubber mounted cab glass
Window sun screen
LED warning strobe
Product Link™
HD Semi-U - 16.1 m3 (21.1 yd3)
Paint, black blade rear
High ambient cooling - software (recommended for site conditions that do not exceed 49°C [121°F]
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
Fender extensions, roading, front and rear
