844 Wheel Dozer

Engine ModelC27 Cat®

Rated Speed1800r/min

Gross Power - ISO 14396752hp

Gross Power - SAE J1995:2014766hp

Net Power - SAE J1349 - Standard Ambient699hp

Net Power - SAE J1349 - High Ambient648hp

Bore5.4in

Stroke6in

Displacement1649.5in³

Peak Torque - Speed2624lb/ft

Torque Rise18%

EmissionsU.S. EPA Tier 4 Final and EU Stage V or China Nonroad Stage III Emissions standards, equivalent to U.S. EPA Tier 2

Operating Weight165089lb

Blade Capacities15.9 - 30.7 m3 (20.7 - 40.2 yd3)

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

Output at 2,000 rpm and 6900 kPa (1,000 psi)82gal/min

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 Flow94.3gal/min

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 (Global Warming Potential = 1430). The system contains 1.8 kg of refrigerant which has a CO2 equivalent of 2.574 metric tonnes.

FrontFixed

RearTrunnion

Oscillation Angle8.5°

BrakesMeets ISO 3540:2011

Operator Sound Level (ISO 6396:2008)69dB(A)

Machine Sound Level (ISO 6395:2008)115dB(A)

Operator Sound Level (ISO 6396:2008)69dB(A)

Machine Sound Level (ISO 6395:2008)113dB(A)

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

Air conditioner and heater with automatic temperature control

Cab, sound-suppressed pressurized, protective structure (ROPS/FOPS), radio ready for (entertainment) includes antenna, speakers and converter (12V, 10-15 amp)

12V power port for mobile phone or laptop connection

Cigar lighter and ashtray

Coat hook

Electro-hydraulic blade controls (joystick)

Flip-up armrest

Heater and defroster

Horn, electric

Instrumentation, gauges: - Engine coolant temperature - Fuel level - Ground speed - Gear - Hydraulic oil temperature - Speedometer/tachometer - Torque converter temperature

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

Keypad, control with indicator lights: - Auto trans mode speed range - Auto/manual transmission mode - Lockup clutch - Reduced rimpull - Throttle lock

Light, dome (cab)

Lunchbox and beverage holders

Mirrors, rearview (externally mounted)

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

STIC control system with steering lock

Tinted glass

Wet-arm wipers/washers (front, rear and corner) intermittent front wiper

Converter (12V, 10/15 amp) and power port

Optional

Cab precleaner

AM/FM/MP3 radio

Satellite Sirius radio with Bluetooth

LED warning strobe

CB radio ready

Window sun shade

Standard

Brakes, oil cooled, multi-disc, service/secondary

Axle-shaft oil-disc service brake

Electro hydraulic parking brake

Cat clean emission module (Tier 4 only)

Demand fan

Engine Cat C27

Fuel priming pump (electric)

Ground level engine shutoff

Mufflers (under hood) (Tier 2 only)

Precleaner, engine air intake

Radiator, Aluminum Modular (AMR)

Separated cooling system

Starting aid, (ether) automatic

Throttle Lock electronic

Torque Converter, Impeller Clutch with lock-up clutch feature and rimpull control system

Transmission, 534 mm (21 in) planetary power shift (electronic) (3F/3R)

Optional

50° C (-58° F) antifreeze

Engine oil change system, high speed, Wiggins

Engine block heater 120V or 240V

High ambient cooling - software

Standard

Alternator, 150 amp

Batteries, maintenance free (4 - 1,400 CCA)

Deutsch terminal connectors

Electrical system, 24V

Electronic transmission control

Lighting system, halogen (front and rear) lighting, access stairway, engine compartment

Starting and charging system, 24V

Starter lockout in bumper

Starting receptacle for emergency start

Transmission lockout in bumper

Standard

Vital Information Management System (VIMS) 3G with graphical information display: external data port, customizable operator profiles

Case drain filters

Coupling, Caterpillar O-ring face seals

Guards, crankcase and power train

Hitch, drawbar with pin

Hoses, Cat XT

Oil sampling valves

Product Link^™

Standard

Camera, rear vision

Implement lockout switch

Seat belt, retractable, 76 mm (3 in) wide

Trainer seat with lap belt

Alarm, back-up

Emergency platform egress

Stairway, left and right rear access

Steering, secondary

Toe kicks

Standard

Fenders, steel (front)

Optional

Front and rear roading fenders

Standard

Axle temperature sensor

Battery disconnect and jump start receptacle, bumper

Economy mode with on demand throttle

Engine, crankcase, 500 hour interval with CH4

Engine idle management features: - Auto idle kickdown - Delayed engine shutdown - Engine idle shutdown

Grouped/labeled lube points

Positive flow control hydraulic system

Sight Gauges: hydraulic tanks, steering/fan and implement/brake, and transmission

Steering, load sensing

Vandalism protection caplocks

Premixed 50% concentration of extended life coolant with freeze protection to -34° C (-29° F)

Optional

Venturi stack

Optional

Semi-U - 17.8 m3 (23.3 yd3)

HD Semi-U - 16.1 m3 (21.1 yd3)

Coal - 30.7 m3 (40.2 yd3)

Optional

Fast fill fuel system (Shaw-Aero)

Axle oscillation stop

Paint, black blade rear