844 Wheel Dozer

Engine ModelCat® C27

Net Power - SAE J1349:2011 - Standard Ambient732hp

Rated Speed1800r/min

EmissionsOption 1 - U.S. EPA Tier 4 Final / EU Stage V

Engine Power - ISO 14396:2002786hp

Gross Power - SAE J1995:2014801hp

Net Power - SAE J1349:2011 - High Ambient681hp

EmissionsOption 2 - China Nonroad Stage III emissions standards, equivalent to U.S. EPA Tier 2

Engine Power - ISO 14396: 2002752hp

Gross Power - SAE J1995:2014766hp

Net Power - SAE J1349:2011 - Standard Ambient699hp

Net Power - SAE J1349:2011 - High Ambient648hp

Bore5.4in

Stroke6in

Displacement1649.5in³

Peak Torque - Speed2624lb/ft

Torque Rise18%

NoteNet 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 Weight165089lb

Blade Capacity Range20.8yd³

Transmission TypeCat Planetary Power Shift

Converter Drive - Forward 14.5mile/h

Converter Drive - Forward 28.3mile/h

Converter Drive - Forward 314.2mile/h

Converter Drive - Reverse 14.9mile/h

Converter Drive - Reverse 29.1mile/h

Converter Drive - Reverse 315.5mile/h

Direct Drive - Forward 1Lock-up disabled

Direct Drive - Forward 28.5mile/h

Direct Drive - Forward 315.2mile/h

Direct Drive - Reverse 15.4mile/h

Direct Drive - Reverse 29.6mile/h

Direct Drive - Reverse 316.4mile/h

NoteTravel speeds based on 45/65-45 L-5 46 ply tires.

Output at 2,000 rpm and 6900 kPa (1,000 psi)82gpm

Cylinders, Double Acting - Lift, Bore and Stroke133 mm × 1535 mm (5.25 in × 60.4 in)

Cylinder, Double Acting - Tilt and Tip, Bore and Stroke210 mm × 188 mm (8.25 in × 7.4 in)

Relief Valve Setting - Bulldozer (Large Pump)2700psi

Relief Valve Setting - Tilt Cylinders (Small Pump)2920psi

Steering System - CircuitPilot, load sensing

Steering System - PumpPiston, variable displacement

Minimum Turning Radius - Over Blade34ft

Total Steering Angle35°

Maximum Flow94.3gpm

Relief Valve Setting4500psi

Fuel Tank - Standard286.6gal (US)

Cooling System54.9gal (US)

Crankcase20gal (US)

Transmission29.1gal (US)

Differential - Final Drives - Front71.6gal (US)

Differential - Final Drives - Rear68.9gal (US)

Hydraulic System - Implement and Hydraulic Fan68.9gal (US)

Hydraulic System - Steering and Braking34.9gal (US)

Air ConditioningThe 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

FrontFixed

RearTrunnion

Oscillation Angle8.5°

BrakesMeets ISO 3540:2011

Operator Sound Pressure Level (ISO 6396:2008)72dB(A)

Machine Sound Power Level (ISO 6395:2008)116dB(A)

Operator Sound Pressure Level (ISO 6396:2008)*72dB(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)

Machine Sound Power Level (ISO 6395:2008)116dB(A)

Operator Sound Pressure Level (ISO 6396:2008)*72dB(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.

ROPS/FOPSISO 3471:2008 and ISO 3449:2005 Level II Standards

Height - Top of ROPS17.2ft

Height - Top of Exhaust Pipe16.6ft

Height - Top of Hood12.7ft

Ground Clearance2ft

Centerline of Front Axle to Hitch7.5ft

Centerline of Rear Axle to Edge of Bumper12.5ft

Wheel Base15.1ft

Length - With Blade on Ground36.5ft

Standard

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

Optional

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

Standard

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

Optional

Lights, LED

Product Link (Cellular)

Product Link (Satellite)

Standard

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)

Optional

Engine brake

No-spin rear axle

No-spin rear axle and oil cooler

Precleaner, raised

Standard

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

Optional

Radio, Sirius XM/AM/FM radio with Bluetooth technology, USB port, 3.5 mm AUX input

Rubber mounted cab glass

Window sun screen

Standard

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

Optional

LED warning strobe

Standard

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

Optional

Product Link^™

Standard

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

Optional

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

Standard

Heated seat

Optional

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

Standard

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

Standard

Front fenders

Optional

Fender extensions, roading, front and rear

Optional

HD Semi-U - 16.1 m3 (21.1 yd3)

Paint, black blade rear