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 |
| Engine Model | Cat® C27 |
| Net Power – SAE J1349:2011 – Standard Ambient | 732 hp |
| Rated Speed | 1800 r/min |
| Emissions | Option 1 – U.S. EPA Tier 4 Final / EU Stage V |
| Engine Power – ISO 14396:2002 | 786 hp |
| Gross Power – SAE J1995:2014 | 801 hp |
| Net Power – SAE J1349:2011 – High Ambient | 681 hp |
| Emissions | Option 2 – China Nonroad Stage III emissions standards, equivalent to U.S. EPA Tier 2 |
| Engine Power – ISO 14396: 2002 | 752 hp |
| Gross Power – SAE J1995:2014 | 766 hp |
| Net Power – SAE J1349:2011 – Standard Ambient | 699 hp |
| Net Power – SAE J1349:2011 – High Ambient | 648 hp |
| Bore | 5.4 in |
| Stroke | 6 in |
| Displacement | 1649.5 in³ |
| Peak Torque – Speed | 2624 lb/ft |
| Torque Rise | 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 |
| Blade Capacity Range | 20.8 yd³ |
| Transmission Type | Cat Planetary Power Shift |
| Converter Drive – Forward 1 | 4.5 mile/h |
| Converter Drive – Forward 2 | 8.3 mile/h |
| Converter Drive – Forward 3 | 14.2 mile/h |
| Converter Drive – Reverse 1 | 4.9 mile/h |
| Converter Drive – Reverse 2 | 9.1 mile/h |
| Converter Drive – Reverse 3 | 15.5 mile/h |
| Direct Drive – Forward 1 | Lock-up disabled |
| Direct Drive – Forward 2 | 8.5 mile/h |
| Direct Drive – Forward 3 | 15.2 mile/h |
| Direct Drive – Reverse 1 | 5.4 mile/h |
| Direct Drive – Reverse 2 | 9.6 mile/h |
| Direct Drive – Reverse 3 | 16.4 mile/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 |
| 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 |
| Relief Valve Setting – Tilt Cylinders (Small Pump) | 2920 psi |
| Steering System – Circuit | Pilot, load sensing |
| Steering System – Pump | Piston, variable displacement |
| Minimum Turning Radius – Over Blade | 34 ft |
| Total Steering Angle | 35 ° |
| Maximum Flow | 94.3 gpm |
| Relief Valve Setting | 4500 psi |
| Fuel Tank – Standard | 286.6 gal (US) |
| Cooling System | 54.9 gal (US) |
| Crankcase | 20 gal (US) |
| Transmission | 29.1 gal (US) |
| Differential – Final Drives – Front | 71.6 gal (US) |
| Differential – Final Drives – Rear | 68.9 gal (US) |
| Hydraulic System – Implement and Hydraulic Fan | 68.9 gal (US) |
| Hydraulic System – Steering and Braking | 34.9 gal (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 |
| Rear | Trunnion |
| Oscillation Angle | 8.5 ° |
| Brakes | Meets ISO 3540:2011 |
| Operator Sound Pressure Level (ISO 6396:2008) | 72 dB(A) |
| Machine Sound Power Level (ISO 6395:2008) | 116 dB(A) |
| Operator Sound Pressure Level (ISO 6396:2008)* | 72 dB(A) |
| Machine Sound Power Level (ISO 6395:2008)* | 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) |
| Machine Sound Power Level (ISO 6395:2008) | 116 dB(A) |
| Operator Sound Pressure Level (ISO 6396:2008)* | 72 dB(A) |
| Machine Sound Power Level (ISO 6395:2008)* | 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 |
| Height – Top of Exhaust Pipe | 16.6 ft |
| Height – Top of Hood | 12.7 ft |
| Ground Clearance | 2 ft |
| Centerline of Front Axle to Hitch | 7.5 ft |
| Centerline of Rear Axle to Edge of Bumper | 12.5 ft |
| Wheel Base | 15.1 ft |
| Length – With Blade on Ground | 36.5 ft |
| 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 |
