844
844 Wheel Dozer
844
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.
- Specifications
- Standard / Optional Features
- Long Name -844 Wheel Dozer
- Name -844
- Brand -Caterpillar
- Status -Current
- Engine Model - 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
- 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
- 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.
- Operating Weight - 165089 lb / 74883 kg
- Blade Capacity Range - 20.8 yd³ / 15.9 m³
- 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
- Note - Travel speeds based on 45/65-45 L-5 46 ply tires.
- Output at 2,000 rpm and 6900 kPa (1,000 psi) - 82 gpm / 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
- 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 ° / 35 °
- Maximum Flow - 94.3 gpm / 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).
- Front - Fixed
- Rear - Trunnion
- Oscillation Angle - 8.5 ° / 8.5 °
- Brakes - 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
- 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) - 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
- 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.
- ROPS/FOPS - 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
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
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